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Q1. | The electrical power to a megger is provided by |

A. | battery [Wrong Answer] |

B. | inverter [Wrong Answer] |

C. | permanent magnet dc generator [Correct Answer] |

D. | ac generator [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ The type of noise that interfere very much with high frequency transmission is

white

transit time

flicker

shot

⇒ When a coil consisting of single turn rotates at a uniform speed in a magnetic field, the induced e.m.f. is

changing

reversing

steady

alternating

⇒ The output V-I characteristics of an Enhancement type MOSFET has

only an ohmic region

only a saturation region

an ohmic region at low voltage value followed by a saturation region at higher voltages.

an ohmic region at large voltage values. Preceded by a saturation region at lower voltages.

⇒ A reactance function is always a quotient of

even to odd polynomials

odd to even polynomials

even to odd or odd to even polynomials

even to even polynomials

⇒

- P(
*s*) =*s*^{4}+*s*^{3}+ 2*s*^{2}+ 4*s*+ 3 - Q(
*s*) =*s*^{4}+ 2*s*^{3}+*s*

*s*) and Q(

*s*) polynomials?

Both P(

*s*) and Q(

*s*) are Hurwitz

Both P(

*s*) and Q(

*s*) are non-Hurwitz

P(

*s*) is Hurwitz but Q(

*s*) is non-Hurwitz

P(

*s*) is non-Hurwitz but Q(

*s*) is Hurwitz

⇒ A moving iron voltmeter reads 250 V when connected to 250 V dc. If connected to 250 V 50 Hz, the voltmeter reading is likely to be

250 V

252 V

248 V

210 V

⇒ Fourier transform is defined for

periodic

non-periodic

finite duration

all

⇒ At the peak of negative half cycle in fi

diode A is forward biased and diode B is reverse biased

both diodes are reverse biased

both diodes are forward biased

diode A is reverse biased and diode B is forward biased

⇒ The discrete time system describes by

*y*(

*n*) =

*x*(

*n*

^{2}) is

casual, Linear, time varying

casual, non-linear, timevari

non-casual, Linear, time invariant

non-casual, non-linear, time variant

⇒ In a circuit of figure, V

_{s}= 10 cos(ω

*t*) power drawn by the 2Ω resistor is 4 watts. The power facto

0.3

0.4

0.6

none

⇒ Measurement of Hall coefficient enables the determination of

transportation factor decreases and a increases

transportation factor increases and a increases

transportation factor increases and a decreases

transportation factor decreases and a decreases

⇒ Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.

TRUE

FALSE

⇒ In AM increased depth of modulation increases __________ and in FM with increased depth of modulation __________ increases.

total transmitted power, bandwidth

bandwidth, bandwidth

bandwidth, total transmitted power

total transmitted power, sideband power

⇒ If E is energy level of electron and E

_{F}is Fermi level, then

all quantum states with E less than E

_{F}will be occupied at T = 0

all quantum states with E less than E

_{F}will be empty at T = 0

some quantum states with E less than E

_{F}will be occupied at T = 0

none of the above

⇒ Cross-over distortion behaviour is a characteristic of

class A output stage

class B output stage

class AB output stage

common base output stage

⇒ Antiferromagnetic materials do not have permanent dipoles.

TRUE

FALSE

⇒ In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The image frequency at 1000 kHz will be

1010 kHz

1455 kHz

1910 kHz

545 kHz

⇒ If D, G and η denote the directly, power gain and efficiency of an antenna, then which of the following relation holds :

DGη = 1

η = DG

D = ηG

D = G/η

⇒ The characteristic equation of a feedback control system is given by

*s*

^{3}+ 5

*s*

^{2}+ (K + 6)

*s*+ K

(- 3, 0)

(- 2, 0)

(- 1, 0)

(2, 0)

⇒ Which one of the following pairs is not correctly matched?

NaCl : Diamagnetic

Gd : Paramagnetic

Ferrite : Ferrimagnetic

Cr

_{2}O

_{3}: Ferromagnetic

⇒ For an op-amp source follower circuit

input and output voltages have same magnitude

output and input voltages are in phase

output and input voltages are in phase but have different magnitudes

output and input voltages have same magnitude and are in phase

⇒ The output voltage waveform of a CE amplifier is fed to a dc coupled CRO. The trace on the screen will be

dc output voltage

ac output voltage

sum of dc and ac output voltage

either (a) or (b)

⇒ In a thermocouple temperature transducer, the output voltage is usually measured by

high resistance ammeter

high resistance voltmeter

high resistance milli-voltmeter

none of the above

⇒ A transistor has a power rating of 8 W for a case temperature of 25°C. If derating factor is 30 mW/°C, the power rating for 55°C, case temperature is

8 W

7.5 W

7.1 W

6.8 W

⇒ Ohm's law is valid for

dc voltage and current

ac voltage and current

all voltages and current

dc and ac voltages and currents

⇒ Probability density function of thermal noise is

Poisson

Binomial

Gaussian

None of the above

⇒ If A = 7 ∠15, A

^{2}is

49 ∠225°

49 ∠30°

49 ∠15°

49 ∠7.5°

⇒ Which of the following operation are performed on linear queues?

- Testing a linear queue for underflow
- Enqueue operation
- Dequeue operation
- Testing a linear queue for overflow.

1, 2 and 3

2, 3 and 4

1, 3 and 4

1, 2, 3 and 4

⇒

**Assertion (A):** A half wavelength line can be used as a 1 : 1 transformer.

**Reason (R):** The input impedance of a half wavelength line is equal to load impedance.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

⇒ A Darlington pair consist of

two CB amplifiers

two CC amplifiers

two cascaded CC amplifiers

two cascaded CE amplifiers