Electrical Engineering (EE)
where F(s) is the Laplace transform of f(t) 
is equal to
Bhuvaneshwari Kanagaraj asked • 2 hours agoThe main characteristics of a Darlington amplifier are- a)high input impedance, low output impedance and high current gain.
- b)low input impedance, low output impedance and low current gain.
- c)high input impedance, high output impedance and high current gain.
- d)low input impedance, low output impedance and high current gain.
Correct answer is option 'A'. Can you explain this answer?
The main characteristics of a Darlington amplifier are
a)
high input impedance, low output impedance and high current gain.
b)
low input impedance, low output impedance and low current gain.
c)
high input impedance, high output impedance and high current gain.
d)
low input impedance, low output impedance and high current gain.
Suraj Ekal asked • 3 hours agoWhich one of the following statements is correct? A tunnel diode is always biased- a)By a dc source
- b)In the middle of its negative resistance region
- c)In the positive resistance region nearest tozero
- d)In the reverse direction
Correct answer is option 'B'. Can you explain this answer?
Which one of the following statements is correct? A tunnel diode is always biased
a)
By a dc source
b)
In the middle of its negative resistance region
c)
In the positive resistance region nearest tozero
d)
In the reverse direction
Anurag Kumar asked • 3 hours agoWhich of the following is the inverse Laplace transform of log5 1\5-1?
Uttam Mohanty asked • 3 hours agoAssertion (A): If points at infinity are included, G(s) has same number of poles and zeros.Reason (R): The function 
has a zero at s = - 2.- a)Both A and R are correct and R is correct explanation of A
- b)Both A and R are correct but R is not correct explanation of A
- c)A is correct but R is wrong
- d)R is correct but A is wrong
Correct answer is option 'B'. Can you explain this answer?
Assertion (A): If points at infinity are included, G(s) has same number of poles and zeros.
Reason (R): The function has a zero at s = - 2.
has a zero at s = - 2.a)
Both A and R are correct and R is correct explanation of A
b)
Both A and R are correct but R is not correct explanation of A
c)
A is correct but R is wrong
d)
R is correct but A is wrong
Harsha Sonarthi Sonarthi asked • 4 hours agoWhen the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop- a)inductor motor torque
- b)induction generator torque
- c)synchronous motor torque
- d)d.c. motor toque
Correct answer is option 'B'. Can you explain this answer?
When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop
a)
inductor motor torque
b)
induction generator torque
c)
synchronous motor torque
d)
d.c. motor toque
Sunil Manjani asked • 4 hours 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
Vishnu Venukuttan asked • 5 hours ago Of the two methods of loop and node variable analysis- a)loop analysis is always preferable,
- b)node analysis is always preferable.
- c)loop analysis may be preferable in some situations while node analysis may be preferable in other situations.
- d)there is nothing to choose between them
Correct answer is option 'B'. Can you explain this answer?
Of the two methods of loop and node variable analysis
a)
loop analysis is always preferable,
b)
node analysis is always preferable.
c)
loop analysis may be preferable in some situations while node analysis may be preferable in other situations.
d)
there is nothing to choose between them
Biswajeet Soren asked • 6 hours agoA modulated signal is given by,s(t) = m1(t) cos (2 π fct) + m2(t) sin (2 π fct)where the baseband signal m1(t) and m2(t) have bandwidths of 10 kHz and 15 kHz respectively. The bandwidth of the modulated signal, in kHz, is- a)10
- b)15
- c)25
- d)30
Correct answer is option 'D'. Can you explain this answer?
A modulated signal is given by,
s(t) = m1(t) cos (2 π fct) + m2(t) sin (2 π fct)
where the baseband signal m1(t) and m2(t) have bandwidths of 10 kHz and 15 kHz respectively. The bandwidth of the modulated signal, in kHz, is
a)
10
b)
15
c)
25
d)
30
Dev Never Give Up asked • 6 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%
Amit Dibragede20 Dibrage asked • 6 hours agoFor successful parallel operation of two singlephase transformers, the most essential condition is that their- a)Percentage impedance are equal
- b)polarities are property connected
- c)Turns rations are exactly equal
- d)KVA ratings are equal
Correct answer is option 'B'. Can you explain this answer?
For successful parallel operation of two singlephase transformers, the most essential condition is that their
a)
Percentage impedance are equal
b)
polarities are property connected
c)
Turns rations are exactly equal
d)
KVA ratings are equal
Aparna Telang asked • 7 hours agoAssertion (A): In liquid system the ratio of change in liquid level to change in flow rate is called resistance of liquid flow.Reason (R): In liquid level systems the ratio of change in liquid stored in a tank to the change in head is called capacitance of tank.- a)Both A and R are correct and R is correct explanation of A
- b)Both A and R are correct but R is not correct explanation of A
- c)A is correct but R is wrong
- d)R is correct but A is wrong
Correct answer is option 'B'. Can you explain this answer?
Assertion (A): In liquid system the ratio of change in liquid level to change in flow rate is called resistance of liquid flow.
Reason (R): In liquid level systems the ratio of change in liquid stored in a tank to the change in head is called capacitance of tank.
a)
Both A and R are correct and R is correct explanation of A
b)
Both A and R are correct but R is not correct explanation of A
c)
A is correct but R is wrong
d)
R is correct but A is wrong
Meera Cherian asked • 7 hours agoWhen a fault occurs in a high voltage transmission line, first the- a)circuit breaker operates then the relay.
- b)relay operates, then successively the isolator and the circuit breaker.
- c)relay operates then the circuit breaker.
- d)isolator operates, then successively the relay and the circuit breaker.
Correct answer is option 'C'. Can you explain this answer?
When a fault occurs in a high voltage transmission line, first the
a)
circuit breaker operates then the relay.
b)
relay operates, then successively the isolator and the circuit breaker.
c)
relay operates then the circuit breaker.
d)
isolator operates, then successively the relay and the circuit breaker.
Dhake Pavan asked • 8 hours agoIn a shaded-pole induction motor, the rotor runs from the- a)shaded portion to the unshaded portion of the pole while the flux in the former leads that in the latter
- b)shaded portion to the unshaded portion of the pole while the flux in the former lags that in the latter
- c)unshaded portion to the shaded portion while the flux in the former leads that in the latter
- d)unshaded portion to the shaded portion while the flux in the former lags that in the latter
Correct answer is option 'C'. Can you explain this answer?
In a shaded-pole induction motor, the rotor runs from the
a)
shaded portion to the unshaded portion of the pole while the flux in the former leads that in the latter
b)
shaded portion to the unshaded portion of the pole while the flux in the former lags that in the latter
c)
unshaded portion to the shaded portion while the flux in the former leads that in the latter
d)
unshaded portion to the shaded portion while the flux in the former lags that in the latter
Vaishali More asked • 8 hours agoAssertion (A): The TTL output acts as a current sink in low state Reason (R): The TTL input current is largest in low state.- a)Both A and R are correct and R is correct explanation of A
- b)Both A and R are correct but R is not correct explanation of A
- c)A is true, R is false
- d)A is false, R is true
Correct answer is option 'B'. Can you explain this answer?
Assertion (A): The TTL output acts as a current sink in low state
Reason (R): The TTL input current is largest in low state.
a)
Both A and R are correct and R is correct explanation of A
b)
Both A and R are correct but R is not correct explanation of A
c)
A is true, R is false
d)
A is false, R is true
Hemalatha S asked • 9 hours agoThe use of electronic instruments is becoming more extensive because they have- a)the capability to respond to signals from remote places
- b)afast response and compatibility with digital computers
- c)both (a) and (b)
- d)a high sensitivity but less reliability
Correct answer is option 'C'. Can you explain this answer?
The use of electronic instruments is becoming more extensive because they have
a)
the capability to respond to signals from remote places
b)
afast response and compatibility with digital computers
c)
both (a) and (b)
d)
a high sensitivity but less reliability
Sunil Manjani asked • 9 hours agoA signal propagated in a waveguide has a full wave of electric intensity change between the two further walls, and no component of the electric field in the direction of propagation. The mode is- a)TE1.1
- b)TE1.0
- c)TM2.2
- d)TE2.0
Correct answer is option 'D'. Can you explain this answer?
A signal propagated in a waveguide has a full wave of electric intensity change between the two further walls, and no component of the electric field in the direction of propagation. The mode is
a)
TE1.1
b)
TE1.0
c)
TM2.2
d)
TE2.0
Manjusha Patil asked • 9 hours agoAssertion (A): Hamming code is commonly used for error correction Reason (R): In Hamming code the number of parity bits increases as the number of information bits increases.- a)Both A and R are correct and R is correct explanation of A
- b)Both A and R are correct but R is not correct explanation of A
- c)A is true, R is false
- d)A is false, R is true
Correct answer is option 'B'. Can you explain this answer?
Assertion (A): Hamming code is commonly used for error correction
Reason (R): In Hamming code the number of parity bits increases as the number of information bits increases.
a)
Both A and R are correct and R is correct explanation of A
b)
Both A and R are correct but R is not correct explanation of A
c)
A is true, R is false
d)
A is false, R is true
Om Matta asked • 10 hours agoA point charge 5nC is located at origin .what is the potential at (2,0,0)?
Vivek Gautam asked • 11 hours agoA series resonant circuit has an inductive reactance of 1000W, a capacitive reactance of 1000W and a resistance of 0. 1W. If the resonant frequency is 10 MHz, then the bandwidth of the circuit will be- a)1 kHz
- b)10 kHz
- c)1 MHz
- d)0.1 kHz
Correct answer is option 'A'. Can you explain this answer?
A series resonant circuit has an inductive reactance of 1000W, a capacitive reactance of 1000W and a resistance of 0. 1W. If the resonant frequency is 10 MHz, then the bandwidth of the circuit will be
a)
1 kHz
b)
10 kHz
c)
1 MHz
d)
0.1 kHz
Prateek Thakur asked • 11 hours agoIn a single-phase induction type energy meter, the lag adjustment is done to ensure that- a)current coil flux lags the applied voltage by 90º.
- b)pressure coil flux lags the applied voltage by 90º.
- c)pressure coil flux is in phase with the applied voltage
- d)current coil flux lags the pressure coil flux by 90º.
Correct answer is option 'B'. Can you explain this answer?
In a single-phase induction type energy meter, the lag adjustment is done to ensure that
a)
current coil flux lags the applied voltage by 90º.
b)
pressure coil flux lags the applied voltage by 90º.
c)
pressure coil flux is in phase with the applied voltage
d)
current coil flux lags the pressure coil flux by 90º.
Sunil Manjani asked • 12 hours agoAn AM signal is detected using an envelope detector. The carrier frequency and modulating signal frequency are 1 MHz and 2 kHz respectively. An appropriate value for the time constant of the envelope detector is- a)500 μ sec.
- b)20 μ sec.
- c)0.2 μ sec.
- d)1 μ sec.
Correct answer is option 'B'. Can you explain this answer?
An AM signal is detected using an envelope detector. The carrier frequency and modulating signal frequency are 1 MHz and 2 kHz respectively. An appropriate value for the time constant of the envelope detector is
a)
500 μ sec.
b)
20 μ sec.
c)
0.2 μ sec.
d)
1 μ sec.
Sunil Manjani asked • 12 hours agoThe Hartley-Shannon theorem sets a limit on the- a)highest frequency that may be sent over a given channel
- b)maximum capacity of channel with a given noise level
- c)maximum number of coding levels in a channel with a given noise level
- d)maximum number of quantizing levels in a channel with a given noise level
Correct answer is option 'B'. Can you explain this answer?
The Hartley-Shannon theorem sets a limit on the
a)
highest frequency that may be sent over a given channel
b)
maximum capacity of channel with a given noise level
c)
maximum number of coding levels in a channel with a given noise level
d)
maximum number of quantizing levels in a channel with a given noise level
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