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?

ARTI DALWAR answered • 9 hours ago

Given,

∴

= 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?

AMITA DHARAM answered • 9 hours ago

Here, 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

= I_{1 }- I_{2} = (6.67 - 5) A = 1.67A

Taking the 10 A current source only:

Hence, the net current through the 2 Ω resistor

= I

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?

SANJU KUMARI answered • 9 hours ago

Let us apply superposition theorem.

Here,

and

∴

= 10 ∠- 90 ° + 0 = -j10 A

Here,

and

∴

= 10 ∠- 90 ° + 0 = -j10 A

Md Suhail Khan asked • 23 minutes ago

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

Correct answer is option 'B'. Can you explain this answer?

Assuming the op-amp to be ideal, the input admittance of the op-amp shown below is

- a)(R
_{1}+ R_{2}) - b)
- c)
- d)

Correct answer is option 'C'. Can you explain this answer?

KIRAN DEVI answered • 9 hours ago

Since the op-amp is ideal, the inverting terminal will be virtually grounded.

Hence, V_{i} = I_{1 }R_{1}

or,

or,

Hence, V

or,

or,

In the circuit shown below, the value of l_{x} 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?

JYOTI PARMAR answered • 9 hours ago

Applying nodal analysis at the given node, we have

or, 3I_{x} = V - 3 ...(i)

Also, 10 = 2I_{x} + V

or, V = 10 - 2I_{x} ...(ii)

Putting V from equation (ii) into equation (i),

3I_{x }= 10 - 2I_{x} - 3

or, 5I_{x }= 7

or,

or, 3I

Also, 10 = 2I

or, V = 10 - 2I

Putting V from equation (ii) into equation (i),

3I

or, 5I

or,

Sunil Manjani asked • 54 minutes ago

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

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

Correct answer is option 'D'. Can you explain this answer?

HEEMA RAJENDER answered • 9 hours ago

Usind nodal analysis,

or,

∴ i = 0 A

or,

∴ i = 0 A

Nanvar Entertainments asked • 55 minutes ago

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

Correct answer is option 'B'. 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

Correct answer is option 'A'. Can you explain this answer?

MENKA PARASHAR answered • 9 hours ago

(Using voltage divider rule)

R

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.

Correct answer is option 'B'. Can you explain this answer?

JYOTI CHARAN answered • 9 hours ago

Node potential is always higher than the other voltages appearing in the equations otherwise a negative value for current would result.

Sangeetha Subburaj answered • 16 hours ago

Correct answer is A .unity

but plz explain the solution

but plz explain the solution

Suraj Kumar asked • 1 hour ago

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

Correct answer is option 'C'. Can you explain this answer?

Pinkesh Patel asked • 1 hour ago

The Voltage Source Inverter (VSI) shown in the figure below is switched to provide a 50Hz, square wave ac output voltage v_{o} across an RL load. Reference polarity of v_{o} and reference direction of the output current i_{o} 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?

VISHRUT KUMAR asked • 3 hours ago

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

Correct answer is option 'B'. Can you explain this answer?

UMESH KUMAR MANDAL asked • 7 hours ago

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

Correct answer is option 'B'. Can you explain this answer?

Taranhaar Kumar asked • 8 hours ago

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

Correct answer is option 'C'. Can you explain this answer?

Rahul Manikandan asked • 8 hours ago

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

Correct answer is option 'A'. Can you explain this answer?

Monika Savaliya asked • 8 hours ago

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

Correct answer is option 'A'. Can you explain this answer?

Sunil Manjani asked • 10 hours ago

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

Correct answer is option 'D'. Can you explain this answer?

Gurpreet Singh asked • 10 hours ago

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

Correct answer is option 'B'. Can you explain this answer?

Guriya Kumari asked • 10 hours ago

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)D
_{1}conducts for greater than 180^{o}and D_{2}conducts for greater than 180^{o} - b)D
_{2}conducts for more than 180^{o}and D_{1}conducts for 180^{o} - c)D
_{1}conducts for 180^{o}and D_{2}conducts for 180^{o}. - d)D
_{1}conducts for more than 180^{o}and D_{2 }conducts for 180^{o}

Correct answer is option 'A'. Can you explain this answer?

Anil Swami asked • 11 hours ago

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

Correct answer is option 'B'. Can you explain this answer?

Arvind Shah asked • 12 hours ago

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

Correct answer is option 'A'. Can you explain this answer?

Manoj Pawar asked • 14 hours ago

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

Correct answer is option 'D'. Can you explain this answer?

RANJITH KUMAR asked • 14 hours ago

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

Correct answer is option 'B'. Can you explain this answer?

Pravesh Varshney asked • 14 hours ago

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

Correct answer is option 'C'. Can you explain this answer?

Sunil Manjani asked • 15 hours ago

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

Correct answer is option 'A'. Can you explain this answer?

Dev Never Give Up asked • 15 hours ago

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%

Correct answer is option 'B'. Can you explain this answer?

Digvijay Kumar asked • 17 hours ago

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

Correct answer is option 'C'. Can you explain this answer?

Sunil Manjani asked • 18 hours ago

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

Correct answer is option 'D'. Can you explain this answer?

Manoj Sharma asked • 18 hours ago

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

Correct answer is option 'D'. Can you explain this answer?

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?

PAMITA JEET asked • 21 hours ago

The Norton’s equivalent circuit for the circuit shown below across the terminals X-Y can be represented as a current source (I_{N}) connected across a resistance (R_{N}). The value of I_{N} and R_{N} 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?

Fetching relevant content for you

Ask a question