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Q1. | For dielectrics in alternating field, polarizability a_{e} is a complex quantity. The imaginary part of a_{e} is zero for |

A. | ω = 0 [Wrong Answer] |

B. | ω → ∞ [Wrong Answer] |

C. | ω = 0 and ω → ∞ [Correct Answer] |

D. | ω = natural frequency ω_{0} [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 :**

⇒ An enhancement mode MOSFET is off when the gate voltage is

zero

negative

less than threshold value

none of the above

⇒ The drain characteristics of JFET are drawn between

V

_{GS}and V

_{DS}for different values of drain current

drain current and V

_{GS}for different values of V

_{DS}

drain current and V

_{DS}for different values of V

_{GS}

drain current and V

_{GS }for one value of V

_{DS}

⇒ Which of the following is 'synchronous'?

Half adder

Full adder

R-S flip-flop

Clocked R-S flip-flop

⇒ A disadvantage of microstrip line as the connections of compared to strip line is that former

do not lend themselves to printed circuit

are more likely to radiate

are bulky

are more expensive and complex

⇒ A typical value of

*g*

_{m}for a FET is about 25 μs.

TRUE

FALSE

⇒ Material which lack permanent magnetic dipoles are known as

paramagnetic

diamagnetic

ferromagnetic

ferrimagnetic

⇒ In a tape recorder the output from RF oscillator is given to

only erase head coil

only record head coil

coils of both erase head and record head

none of the above

⇒ The product

*k*T (where

*k*is Boltzmann's constant and T is absolute temperature) at room temperature is about

0.051 eV

0.026 eV

0.01 eV

0.001 eV

⇒ In static RAM 6264 the number of address inputs are

10

12

13

15

⇒ In the circuit of figure,

*v*

_{03 v1 + 4 v2-3 v1 - 4 v24 v1 + 3 v2-4 v1 - 3 v2}

⇒ How is an N-channel junction Field Effect Transistor operated as an amplifier?

With a forward bias gate source junction

With a reverse bias gate-source junction

With a open gate source junction

With a shorted gate source junction

⇒ The fourier transform of the half cosine pulse as shown below is _______

0.5 {sin [0.5(

*f*- 1)] + sin [0.5 (

*f*+ 1)]}

0.25 [sin c[0.25 (

*f*- 2)1 + sin c[0.25(

*f*+ 2)]]

0.5 {sin c [0.5 (

*f*- 1)] + sin c [0.5 (

*f*+ 1)]}

sin c(

*f*- 0.5) + sin c (

*f*+ 0.5)

⇒ In a moving iron voltmeter the coil has a resistance of 20 Ω and an inductance of 0.3 H. The swamping resistance in 2000 Ω. To ensure correct reading with dc as well as 50 Hz ac, the value of capacitor to be connected in parallel with swamping resistance should be

0.0125 μF

0.0311 μF

0.0521 μF

0.0622 μF

⇒ The parameter A of a two port network is equal to

V

_{2}/V

_{1}with I

_{1}= 0

V

_{1}/I

_{2}with V

_{2}= 0

I

_{1}/I

_{2}with V

_{2}= 0

V

_{1}/V

_{2}with I

_{2}= 0

⇒ Direct and reflected sound waves may interfere with each other.

TRUE

FALSE

⇒ In figure, the reading of wattmeter will be proportio

V I cos θ

3 VI cos θ

3 VI sin θ

V I sin θ

⇒ The range of memory location in given memory interfacing scheme

0000H - 07FFH

F800H - FFFFH

0000H - 03FFH

0000H - 3FFFH

⇒ In a D latch

data bit D is fed to S input and D to R input

data bit D is fed to R input and D to S input

data bit D is fed to both R and S inputs

data bit D is not fed to any input

⇒ For H(

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*j*ω)] ≥ 0 for 0 ≤ ω ≤ ∞ is

a necessary condition

a sufficient condition

a necessary and sufficient condition

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⇒ A time varying magnetic field produces

electric field only

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both magnetic and electric fields

none of the above

⇒ The current flowing through the resistance R in the circuit in the figure has the form 2 cos 4

*t*, where

(0.18 +

*j*0.72)

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*j*1.90)

- (0.18 +

*j*1.90)

(0.23 - 0.35

*j*)

⇒ If the output current wave shape of class C circuit has a period of 1 μs and a pulse width of 0.006 μs, the duty cycle is

0.06

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0.00006

0.0006

⇒ If R

_{T}, R

_{h}represent condition for reciprocity in case of transmission parameter and hybrid parameter respectively and similarly S

_{T}, S

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1 -

*c*2 -

*d*3 -

*a*4 -

*f*

1 -

*c*2 -

*b*3 -

*e*4 -

*d*

1 -

*e*2 -

*d*3 -

*a*4 -

*b*

1 -

*e*2 -

*d*3 -

*a*4 -

*f*

⇒ Sulphur hexafluoride is used in

transformers

generators

relays

circuit breakers

⇒ A separately excited dc motor is run from a dc source through a chopper. At 600 rpm and rated torque, the duty cycle of chopper is 0.8. At 600 rpm and half the rated torque, the duty cycle is likely to be

0.9

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⇒ All of the output pulses are at full transmitter power for a strong signal in all of the following except

PWM

PAM

PFM

PCM

⇒ Which circuit is called swamped amplifier?

CC

CE

CB

Both (a) and (b)

⇒ ABCD + AB C D =

ABC

ABCD

A B D

ABCD

⇒

**Assertion (A):** A half cycle of sine wave can be expressed as sum of sine wave and another sine wave shifted by *T*/2 where T is the time period.

**Reason (R):** The function *u*(*t* - *t*_{0}) - *u*(*t* - *t*_{0} - T) is a gate function occuring at *t* = *t*_{0} and of duration T.

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 true, R is false

A is false, R is true

⇒ The voltage applied to an R-L circuit at

*t*= 0 when switch is closed is 100 cos (100

*t*+ 30°). The circuit resistance is 80 Ω and inductance is 0.6 H (in which initial current is zero). What is the maximum amplitude of current flowing through the circuit?

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