Electrical Engineering (EE)
A network N is to be connected to a load of 500 ohms. If the Thevenin’s equivalent voltage and Norton’s equivalent current of N are 5 volts and 10 mA respectively, the current through the load will be- a)2.5 mA
- b)1 mA
- c)10 mA
- d)5 mA
Correct answer is option 'D'. Can you explain this answer?
A network N is to be connected to a load of 500 ohms. If the Thevenin’s equivalent voltage and Norton’s equivalent current of N are 5 volts and 10 mA respectively, the current through the load will be
a)
2.5 mA
b)
1 mA
c)
10 mA
d)
5 mA
ARTI DALWAR answered • 9 hours agoGiven, 
∴
= 500 Ω
Hence, the current through the load is
∴
= 500 Ω
Hence, the current through the load is
In the π-circuit shown below, the current through the 2 Ω, resistor is
- a)5 A
- b)-6.67 A
- c)11.67 A
- d)1.67 A
Correct answer is option 'D'. Can you explain this answer?
In the π-circuit shown below, the current through the 2 Ω, resistor is
a)
5 A
b)
-6.67 A
c)
11.67 A
d)
1.67 A
AMITA DHARAM answered • 9 hours agoHere, we apply superposition theorem.
Taking the 20 A current source only:
Taking the 10 A current source only:
Hence, the net current through the 2 Ω resistor
= I1 - I2 = (6.67 - 5) A = 1.67A
Taking the 20 A current source only:
Taking the 10 A current source only:
Hence, the net current through the 2 Ω resistor
= I1 - I2 = (6.67 - 5) A = 1.67A
In the circuit shown below, the current through the inductive reactance is
- a)0 A
- b)- j10 A
- c)-J2.25 A
- d)j5 A
Correct answer is option 'B'. Can you explain this answer?
In the circuit shown below, the current through the inductive reactance is
a)
0 A
b)
- j10 A
c)
-J2.25 A
d)
j5 A
SANJU KUMARI answered • 9 hours agoLet us apply superposition theorem.
Here,
and
∴
= 10 ∠- 90 ° + 0 = -j10 A
Here,
and
∴
= 10 ∠- 90 ° + 0 = -j10 A
Md Suhail Khan asked • 23 minutes agoWhich property of delta function indicates the equality between the area under the product of function with shifted impulse and the value of function located at unit impulse instant ?- a)Replication
- b)Sampling
- c)Scaling
- d)Product
Correct answer is option 'B'. Can you explain this answer?
Which property of delta function indicates the equality between the area under the product of function with shifted impulse and the value of function located at unit impulse instant ?
a)
Replication
b)
Sampling
c)
Scaling
d)
Product
Assuming the op-amp to be ideal, the input admittance of the op-amp shown below is
- a)(R1 + R2)
- b)
- c)
- d)
Correct answer is option 'C'. Can you explain this answer?
Assuming the op-amp to be ideal, the input admittance of the op-amp shown below is
a)
(R1 + R2)
b)
c)
d)
KIRAN DEVI answered • 9 hours agoSince the op-amp is ideal, the inverting terminal will be virtually grounded.
Hence, Vi = I1 R1
or,
or,
Hence, Vi = I1 R1
or,
or,
In the circuit shown below, the value of lx is
- a)2 A
- b)-0.6 A
- c)2.6 A
- d)1.4 A
Correct answer is option 'D'. Can you explain this answer?
In the circuit shown below, the value of lx is
a)
2 A
b)
-0.6 A
c)
2.6 A
d)
1.4 A
JYOTI PARMAR answered • 9 hours agoApplying nodal analysis at the given node, we have
or, 3Ix = V - 3 ...(i)
Also, 10 = 2Ix + V
or, V = 10 - 2Ix ...(ii)
Putting V from equation (ii) into equation (i),
3Ix = 10 - 2Ix - 3
or, 5Ix = 7
or,
or, 3Ix = V - 3 ...(i)
Also, 10 = 2Ix + V
or, V = 10 - 2Ix ...(ii)
Putting V from equation (ii) into equation (i),
3Ix = 10 - 2Ix - 3
or, 5Ix = 7
or,
Sunil Manjani asked • 54 minutes agoA Wien-bridge is used to measure the frequency of the input signal. However, the input signal has 10% third harmonic distortion. Specifically the signal is 2 sin 400 πt + 0.2 sin 1200 πt (with t insec). With this input the balance will- a)Lead to a null indication and setting will correspond to a frequency of 200 Hz
- b)Lead to a null indication and setting will correspond to 260 Hz
- c)Lead to a null indication and setting will correspond to 400 Hz
- d)Not lead to null indication
Correct answer is option 'D'. Can you explain this answer?
A Wien-bridge is used to measure the frequency of the input signal. However, the input signal has 10% third harmonic distortion. Specifically the signal is 2 sin 400 πt + 0.2 sin 1200 πt (with t insec). With this input the balance will
a)
Lead to a null indication and setting will correspond to a frequency of 200 Hz
b)
Lead to a null indication and setting will correspond to 260 Hz
c)
Lead to a null indication and setting will correspond to 400 Hz
d)
Not lead to null indication
In the circuit shown in figure below, what is the value of current i through source when V = 4 volts?- a)1 A
- b)2 A
- c)3 A
- d)0 A
Correct answer is option 'D'. Can you explain this answer?
In the circuit shown in figure below, what is the value of current i through source when V = 4 volts?
a)
1 A
b)
2 A
c)
3 A
d)
0 A
HEEMA RAJENDER answered • 9 hours agoUsind nodal analysis,
or,
∴ i = 0 A
or,
∴ i = 0 A
Nanvar Entertainments asked • 55 minutes agoMatch List-I (Power Semiconductor Devices) with List-ll (Characteristics) and select the correct answer using the codes given below the lists:
List-I
A. Power BJT
B. Power MOSFET
C. IGBT
D. Schottky diodeList-ll
1. Exponential l-V characteristics
2. Suitable for high frequency inverters and choppers
3. Square law l-V characteristics
4. Offers ease of control and high current density
- a)a
- b)b
- c)c
- d)d
Correct answer is option 'B'. Can you explain this answer?
Match List-I (Power Semiconductor Devices) with List-ll (Characteristics) and select the correct answer using the codes given below the lists:
List-I
A. Power BJT
B. Power MOSFET
C. IGBT
D. Schottky diode
List-I
A. Power BJT
B. Power MOSFET
C. IGBT
D. Schottky diode
List-ll
1. Exponential l-V characteristics
2. Suitable for high frequency inverters and choppers
3. Square law l-V characteristics
4. Offers ease of control and high current density
1. Exponential l-V characteristics
2. Suitable for high frequency inverters and choppers
3. Square law l-V characteristics
4. Offers ease of control and high current density
a)
a
b)
b
c)
c
d)
d
For the circuit given in figure below, the Thevenin’s voltage and resistance as seen at “AB" are respectively- a)5 V, 10 Ω
- b)10 V, 10 Ω
- c)5 V,5 Ω
- d)5 V, 15 Ω
Correct answer is option 'A'. Can you explain this answer?
For the circuit given in figure below, the Thevenin’s voltage and resistance as seen at “AB" are respectively
a)
5 V, 10 Ω
b)
10 V, 10 Ω
c)
5 V,5 Ω
d)
5 V, 15 Ω
MENKA PARASHAR answered • 9 hours ago
(Using voltage divider rule)
RTh across,
Assertion (A): In the method of solution of the network using nodal analysis, the assumption is made that the node potential is always higher than the other voltages appearing in the equation.
Reason (R): Nodal analysis is used to find the branch currents.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
Correct answer is option 'B'. Can you explain this answer?
Assertion (A): In the method of solution of the network using nodal analysis, the assumption is made that the node potential is always higher than the other voltages appearing in the equation.
Reason (R): Nodal analysis is used to find the branch currents.
Reason (R): Nodal analysis is used to find the branch currents.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
JYOTI CHARAN answered • 9 hours agoNode potential is always higher than the other voltages appearing in the equations otherwise a negative value for current would result.
A 3 phase induction motor draws 1000 KVA at a p.f of 0.8 lag. A synchronous motor is connected in parallel to draw an additional 750 KVA at a power factor of 0.6 lead. The p.f of the total load supplied by the mains is . A. U... more
Sangeetha Subburaj answered • 16 hours agoCorrect answer is A .unity
but plz explain the solution
but plz explain the solution
Suraj Kumar asked • 1 hour agoWhich of the following device can be used as a phase advancer ?- a)3-f induction motor squirrel cage type
- b)3-f induction motor slip ring type
- c)synchronous motor working at leading power factor
- d)synchronous motor working at lagging power factor
Correct answer is option 'C'. Can you explain this answer?
Which of the following device can be used as a phase advancer ?
a)
3-f induction motor squirrel cage type
b)
3-f induction motor slip ring type
c)
synchronous motor working at leading power factor
d)
synchronous motor working at lagging power factor
Pinkesh Patel asked • 1 hour agoThe Voltage Source Inverter (VSI) shown in the figure below is switched to provide a 50Hz, square wave ac output voltage vo across an RL load. Reference polarity of vo and reference direction of the output current io are indicated in the figure. It is given that R = 3 ohms, L = 9.55mH.
Appropriate transition i.e., Zero Voltage Switching (ZVS) / Zero Current Switching (ZCS) of the IGBTs during turn-on / turn-off is- a)ZVS during turn off
- b)ZVS during turn-on
- c)ZCS during turn off
- d)ZCS during turn-on
Correct answer is option 'D'. Can you explain this answer?
The Voltage Source Inverter (VSI) shown in the figure below is switched to provide a 50Hz, square wave ac output voltage vo across an RL load. Reference polarity of vo and reference direction of the output current io are indicated in the figure. It is given that R = 3 ohms, L = 9.55mH.
Appropriate transition i.e., Zero Voltage Switching (ZVS) / Zero Current Switching (ZCS) of the IGBTs during turn-on / turn-off is
a)
ZVS during turn off
b)
ZVS during turn-on
c)
ZCS during turn off
d)
ZCS during turn-on
The steady-state response of the system is given by (when the excitation is 8 cos2t) VISHRUT KUMAR asked • 3 hours agoConsider the following statements: Routh-Hurwitz critierion gives
1. aboslute stability
2. the number of roots lying on the right half of the s-plane
3. the gainmargin and phase margin
Which of these statements are correct ?- a)1, 2 and 3
- b)1 and 3
- c)2 and 3
- d)1
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements: Routh-Hurwitz critierion gives
1. aboslute stability
2. the number of roots lying on the right half of the s-plane
3. the gainmargin and phase margin
Which of these statements are correct ?
1. aboslute stability
2. the number of roots lying on the right half of the s-plane
3. the gainmargin and phase margin
Which of these statements are correct ?
a)
1, 2 and 3
b)
1 and 3
c)
2 and 3
d)
1
UMESH KUMAR MANDAL asked • 7 hours agoIn extrinsic semiconductor, conductivity varies with respect to temperature.- a)For low temperature, it decreases then increases
- b)For low temperature it increases then increases
- c)It increases as temperature increases
- d)It decreases as temperature increases
Correct answer is option 'B'. Can you explain this answer?
In extrinsic semiconductor, conductivity varies with respect to temperature.
a)
For low temperature, it decreases then increases
b)
For low temperature it increases then increases
c)
It increases as temperature increases
d)
It decreases as temperature increases
Taranhaar Kumar asked • 8 hours agoVoltage remaining constant, if the frequency is increased then- a)eddy current losses will decrease
- b)hysteresis loss will decrease
- c)eddy current losses will remain unchanged
- d)hysteresis losses will remain unchanged
Correct answer is option 'C'. Can you explain this answer?
Voltage remaining constant, if the frequency is increased then
a)
eddy current losses will decrease
b)
hysteresis loss will decrease
c)
eddy current losses will remain unchanged
d)
hysteresis losses will remain unchanged
Rahul Manikandan asked • 8 hours agoQ. No. 1 – 5 Carry One Mark EachChoose the most appropriate phrase from the options given below to complete the following sentence.India is a post-colonial country because- a)it was a former British colony
- b)Indian Information Technology professionals have colonized the world
- c)India does not follow any colonial practices
- d)India has helped other countries gain freedom
Correct answer is option 'A'. Can you explain this answer?
Q. No. 1 – 5 Carry One Mark Each
Choose the most appropriate phrase from the options given below to complete the following sentence.
India is a post-colonial country because
a)
it was a former British colony
b)
Indian Information Technology professionals have colonized the world
c)
India does not follow any colonial practices
d)
India has helped other countries gain freedom
Monika Savaliya asked • 8 hours agoThe transfer function C (s ) of a compensator is given below.
The frequency range in which the phase (lead) introduced by the compensator reaches the maximum is- a)0.1 < ω < 1
- b)1 < ω < 10
- c)10 < ω < 100
- d)ω > 100
Correct answer is option 'A'. Can you explain this answer?
The transfer function C (s ) of a compensator is given below.
The frequency range in which the phase (lead) introduced by the compensator reaches the maximum is
a)
0.1 < ω < 1
b)
1 < ω < 10
c)
10 < ω < 100
d)
ω > 100
Sunil Manjani asked • 10 hours agoWhen electromagnetic waves are reflected at an angle from a wall, their wave-length along the wall is- a)the same as in free space
- b)the same as the wavelength perpendicular to the wall
- c)shortened because of the Doppler effect
- d)greater than in the actual direction of propagation
Correct answer is option 'D'. Can you explain this answer?
When electromagnetic waves are reflected at an angle from a wall, their wave-length along the wall is
a)
the same as in free space
b)
the same as the wavelength perpendicular to the wall
c)
shortened because of the Doppler effect
d)
greater than in the actual direction of propagation
Gurpreet Singh asked • 10 hours agoConsider the following statements:In 8085 microprocessor, data - bus and addressbus are multiplexed in order to1. Increase the speed of microprocessor2. Reduce the number of pins.3. Connect more peripheral chips.Which of the above statement is/are correct?- a)1 only
- b)2 only
- c)2 and 3
- d)1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements:
In 8085 microprocessor, data - bus and addressbus are multiplexed in order to
1. Increase the speed of microprocessor
2. Reduce the number of pins.
3. Connect more peripheral chips.
Which of the above statement is/are correct?
a)
1 only
b)
2 only
c)
2 and 3
d)
1, 2 and 3
Guriya Kumari asked • 10 hours agoDirections:Q. No. 11 – 35 Carry One Mark EachQ.In the circuit shown, the diodes are ideal, the inductance is small, and Io ≠ 0. Which one of the following statements is true?
- a)D1 conducts for greater than 180o and D2 conducts for greater than 180o
- b)D2 conducts for more than 180o and D1conducts for 180o
- c)D1 conducts for 180o and D2 conducts for 180o .
- d)D1 conducts for more than 180o and D2 conducts for 180o
Correct answer is option 'A'. Can you explain this answer?
Directions:
Q. No. 11 – 35 Carry One Mark Each
Q.
In the circuit shown, the diodes are ideal, the inductance is small, and Io ≠ 0. Which one of the following statements is true?
a)
D1 conducts for greater than 180o and D2 conducts for greater than 180o
b)
D2 conducts for more than 180o and D1conducts for 180o
c)
D1 conducts for 180o and D2 conducts for 180o .
d)
D1 conducts for more than 180o and D2 conducts for 180o
Anil Swami asked • 11 hours agoConsider the following statements: In root-locus plot, the breakaway points
1. Ned not always be on real axis alone
2. Must lie on the root loci
4. Must lie between 0 and – 1
Which of these statements are correct ?- a)1, 2 and 3
- b)1 and 3
- c)2 and 3
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements: In root-locus plot, the breakaway points
1. Ned not always be on real axis alone
2. Must lie on the root loci
4. Must lie between 0 and – 1
Which of these statements are correct ?
1. Ned not always be on real axis alone
2. Must lie on the root loci
4. Must lie between 0 and – 1
Which of these statements are correct ?
a)
1, 2 and 3
b)
1 and 3
c)
2 and 3
d)
None of the above
Arvind Shah asked • 12 hours agoEddy current damping is not used on type instruments because- a)the presence of a permanent magnet required damping would affect the deflection and reading of the instrument
- b)the presence of permanent magnet will result overheating of the coil
- c)uneven scale will be required and the instrument will require calibration every time
- d)excessive vibration will result in a disc due to eddy currents, thereby affecting the accuracy
Correct answer is option 'A'. Can you explain this answer?
Eddy current damping is not used on type instruments because
a)
the presence of a permanent magnet required damping would affect the deflection and reading of the instrument
b)
the presence of permanent magnet will result overheating of the coil
c)
uneven scale will be required and the instrument will require calibration every time
d)
excessive vibration will result in a disc due to eddy currents, thereby affecting the accuracy
Manoj Pawar asked • 14 hours agoIn the optimum generator scheduling different power plants, the minimum fuel cost is obtained when- a)only the incremental fuel cost of each plant is the same
- b)the penalty factor of each plant is the same
- c)the ratio of the incremental fuel cost to the penalty factor of each plant is the same.
- d)the incremental fuel cost of each plant multiplied by its penalty factor is the same
Correct answer is option 'D'. Can you explain this answer?
In the optimum generator scheduling different power plants, the minimum fuel cost is obtained when
a)
only the incremental fuel cost of each plant is the same
b)
the penalty factor of each plant is the same
c)
the ratio of the incremental fuel cost to the penalty factor of each plant is the same.
d)
the incremental fuel cost of each plant multiplied by its penalty factor is the same
RANJITH KUMAR asked • 14 hours agoConsider the following statements: A proportional plus derivative controller
1. has high sensitivity
2. increases the stability of the system
3. improves the steady-state accuracy
Which of these statements are correct ?
- a)1, 2 and 3
- b)1 and 2
- c)2 and 3
- d)1 and 3
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements: A proportional plus derivative controller
1. has high sensitivity
2. increases the stability of the system
3. improves the steady-state accuracy
Which of these statements are correct ?
1. has high sensitivity
2. increases the stability of the system
3. improves the steady-state accuracy
Which of these statements are correct ?
a)
1, 2 and 3
b)
1 and 2
c)
2 and 3
d)
1 and 3
Pravesh Varshney asked • 14 hours agoConsider the following statements related to
Thevenin’s theorem:
For the application of Thevenin’s theorem
1. the circuit should not. contain non-iinear elements.
2. the circuit may contain unilateral or bilateral elements or both.
3. there should not be magnetic coupling between the load and circuit, to be replaced by Thevenin's theorem.
4. there should not be controlled sources on the load size, controlled from some other oart of the circuit.- a)1,2 and 3 only
- b)2, 3 and 4 only
- c)1,3 and 4 only
- d)1 and 4 only
Correct answer is option 'C'. Can you explain this answer?
Consider the following statements related to
Thevenin’s theorem:
For the application of Thevenin’s theorem
1. the circuit should not. contain non-iinear elements.
2. the circuit may contain unilateral or bilateral elements or both.
3. there should not be magnetic coupling between the load and circuit, to be replaced by Thevenin's theorem.
4. there should not be controlled sources on the load size, controlled from some other oart of the circuit.
Thevenin’s theorem:
For the application of Thevenin’s theorem
1. the circuit should not. contain non-iinear elements.
2. the circuit may contain unilateral or bilateral elements or both.
3. there should not be magnetic coupling between the load and circuit, to be replaced by Thevenin's theorem.
4. there should not be controlled sources on the load size, controlled from some other oart of the circuit.
a)
1,2 and 3 only
b)
2, 3 and 4 only
c)
1,3 and 4 only
d)
1 and 4 only
Sunil Manjani asked • 15 hours agoWhich one of the following statements is correct- a)linearity is worse than that of a phase discriminator
- b)stabilization is provided against signal strength variations
- c)the output is twice of that obtainable from a similar phase discriminator
- d)the circuit is same as that in a discriminator, except that the diode connections are reversedIn a ratio detector
Correct answer is option 'A'. Can you explain this answer?
Which one of the following statements is correct
a)
linearity is worse than that of a phase discriminator
b)
stabilization is provided against signal strength variations
c)
the output is twice of that obtainable from a similar phase discriminator
d)
the circuit is same as that in a discriminator, except that the diode connections are reversedIn a ratio detector
Dev Never Give Up asked • 15 hours agoTwo -insulator discs of identical capacitance value C makes up a string for a 22 kV, 50 Hz,single-phase overhead line insulation system. If the pin to earth capacitance is also C, then the string efficiency is- a)50%
- b)75%
- c)90%
- d)86%
Correct answer is option 'B'. Can you explain this answer?
Two -insulator discs of identical capacitance value C makes up a string for a 22 kV, 50 Hz,single-phase overhead line insulation system. If the pin to earth capacitance is also C, then the string efficiency is
a)
50%
b)
75%
c)
90%
d)
86%
Digvijay Kumar asked • 17 hours agoThe load currents in short-circuit calculation are neglected because
1. short-circuit currents are much larger than load currents.
2. short-circuit currents are greatly out of phase with load currents.
Which of these statement(s) is/are correct ?- a)neither 1 nor 2
- b)2 alone
- c)1 alone
- d)1 and 2
Correct answer is option 'C'. Can you explain this answer?
The load currents in short-circuit calculation are neglected because
1. short-circuit currents are much larger than load currents.
2. short-circuit currents are greatly out of phase with load currents.
Which of these statement(s) is/are correct ?
1. short-circuit currents are much larger than load currents.
2. short-circuit currents are greatly out of phase with load currents.
Which of these statement(s) is/are correct ?
a)
neither 1 nor 2
b)
2 alone
c)
1 alone
d)
1 and 2
Sunil Manjani asked • 18 hours agoA directional coupler with three or more holes is sometimes used in preference to the two-hole coupler- a)because it is more efficient
- b)to increase coupling of the signal
- c)to reduce spurious mode generation
- d)to increase the bandwidth of the system
Correct answer is option 'D'. Can you explain this answer?
A directional coupler with three or more holes is sometimes used in preference to the two-hole coupler
a)
because it is more efficient
b)
to increase coupling of the signal
c)
to reduce spurious mode generation
d)
to increase the bandwidth of the system
Manoj Sharma asked • 18 hours agoIn a thyrite lightning arrester the resistance- a)varies linearly with applied voltage
- b)increases with the applied voltage
- c)Decreases linearly with the applied voltage
- d)is high at low current and low at high current
Correct answer is option 'D'. Can you explain this answer?
In a thyrite lightning arrester the resistance
a)
varies linearly with applied voltage
b)
increases with the applied voltage
c)
Decreases linearly with the applied voltage
d)
is high at low current and low at high current
BHAWANA KUMARI asked • 18 hours ago A recording of the output of the emf induced for star and delta are recorded.Then shape of the emf induced in Y-connected 3-phase transformer is non sinusoidal in nature due to- a)3rd harmonic component of currents is absent
- b)3rd harmonic component of currents is present
- c)negative sequence component of current is present
- d)none of the mentioned
Correct answer is option 'A'. Can you explain this answer?
A recording of the output of the emf induced for star and delta are recorded.Then shape of the emf induced in Y-connected 3-phase transformer is non sinusoidal in nature due to
a)
3rd harmonic component of currents is absent
b)
3rd harmonic component of currents is present
c)
negative sequence component of current is present
d)
none of the mentioned
PAMITA JEET asked • 21 hours agoThe Norton’s equivalent circuit for the circuit shown below across the terminals X-Y can be represented as a current source (IN) connected across a resistance (RN). The value of IN and RN are respectively
- a)1.25 A and 0.8 Ω
- b)1 A and 0.5 Ω
- c)1 A and 0.8 Ω
- d)1.25 A and 0.5 Ω
Correct answer is option 'C'. Can you explain this answer?
The Norton’s equivalent circuit for the circuit shown below across the terminals X-Y can be represented as a current source (IN) connected across a resistance (RN). The value of IN and RN are respectively
a)
1.25 A and 0.8 Ω
b)
1 A and 0.5 Ω
c)
1 A and 0.8 Ω
d)
1.25 A and 0.5 Ω
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