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Q1. | The useful magnetic flux obtainable from any closed surface is |

A. | unity [Wrong Answer] |

B. | constant [Wrong Answer] |

C. | both (a) and (b) [Wrong Answer] |

D. | none of the above [Correct Answer] |

View Answer
Explanation:-
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**Also Read Similar Questions Below :**

⇒ A certain transistor has a

_{dc}of 0.98 and a collectors leakage current of 5 μA. If I

_{E}= 1 mA, the base current will be

35 μA

25 μA

15 μA

5 μA

⇒ The frequency response of an ideal tuned amplifier should be as represented in figur

A

B

C

D

⇒ In a dual converter operated in circulating current mode, the circulating current flows

when load current is zero

when load current is non-zero

even when load current is zero

none of the above

⇒ In TTL the transistors are driven into and out of saturation.

TRUE

FALSE

⇒ In a satellite system circular polarization is to be obtained. The antenna used is

parabolic

horn

log periodic

helical

⇒ The carrier frequency will be if L = 50 µH and C = 1 nF.

512

612 kHz

712 kHz

812 kHz

⇒ In the output of a DM speech encoder, the consecutive pulses are of opposite polarity during time interval

*t*

_{1}<

*t*<

*t*

_{2}. This indicates that during this interval

the input to the modulator is essentially constant

the modulator is going through slope overload

the accumulator is in saturation

the speech signal is being sampled at the Nyquist rate

⇒ Each cell of a static RAM has

4 MOS transistors

4 MOS transistors and 2 capacitors

2 MOS transistors and two capacitors

1 MOS transistor and 1 capacitor

⇒ A voltage wave

*v*= 10 + 20 sin ω

*t*+ 7.5 sin 3 ω(

*t*) is applied to a series combination of two elements. The current is

*i*= 5 sin (ω

*t*+ 20°) + 1.5 sin (3ω

*t*+ 10°). The elements are

R and C

R and L

L and C

both inductances

⇒ For what positive value of K does the polynomial

*s*

^{4}+ 8

*s*

^{3}+ 24

*s*

^{2}+ 32

*s*+ K have roots with zero real parts?

10

20

40

80

⇒ At a temperature of about 1 K, aluminium is a

conductor

insulator

photoconductor

superconductor

⇒ If a number of odd functions are added, the resultant sum is

even function

odd funtion

either even or odd function

mixture of odd amd even functions

⇒ For the logic circuit of the given figure,

A + BC

BC

AB

AB + C

⇒ An RLC series circuit has R = 1 Ω, L = 1 H, C = 1 F. The damping ratio is

More than 1

1

0.5

Zero

⇒

**Assertion (A):** A class C chopper can operate in first and second quadrants

**Reason (R):** A class B chopper operates only in second quadrant.

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

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

A is correct but R is wrong

A is wrong but R is correct

⇒ The 1150 kg geosynchronous satellite INSAT-IA parked 36000 km above India had greatly improved India's

intelligence gathering capacity

domestic communications

meteorological capability

both (b) and (c)

⇒ In a Vidicon camera tube, the beam current is controlled by

grid G

_{1}

grid G

_{2}

grids G

_{1}, G

_{2}, G

_{3}

grid G

_{2}, G

_{3}

⇒ If the numerator of Z(

*s*) is one degree higher than denominator, Z(

*s*) has a pole at infinity.

TRUE

FALSE

⇒ N circles for a = a

_{1}, and a = a

_{1}± 180°

*n*(where

*n*= 1, 2, 3, ....) are the same.

TRUE

FALSE

⇒ Fourier transform of an external exponential

*e*

*W0*

^{j}*t*

δ(

*f*-

*f*

_{0})

1

δ(

*f*+

*f*

_{0})

∞

⇒ In figure the output

*v*(

*t*)

phase modulated signal

amplitude modulated signal

frequency modulated signal

none of the above

⇒ The open loop gain of an actual op-amp is about 100.

TRUE

FALSE

⇒ In analog signal given below is sampled at such a rate that the samples of signal can be given to a collection of buffers having capacity of either 24 samples/sec. or 25 samples/sec. The sampling rate is minimum such that it fully utilizes the collection of both types of buffers

*m(t)*= 2 sin 480p

*t*+ 3 sin 720 p

*t<*

600 H

300 H

1200 H

2400 H

600 H

*z*300 H

*z*1200 H

*z*2400 H

*z*

⇒ The main advantage of TDM over FDM is

TDM requires more bandwidth than FDM

less complicated in hardware than FDM

better SNR

required filter

⇒ Schering bridge is used to measure

capacitance and dielectric loss

inductance

resistance

mutual inductance

⇒ When .4546 E 5 and .5433 E 7 are to be added in normalized floating point mode

none of the numbers is changed to any other form

.4546 E 5 is changed .004546 E 7 and .5433 E 7 is not changed

.5433 E 7 is changed to 54.33 E 5 and .4546 E 5 is not changed

both the numbers are changed and their exponents are made equal to 6

⇒ The number of memory locations in which 14 address bits can access is

1024

2048

4096

16384

⇒ In laboratory experiment the output from reflex klystron is moderated by square wave because

it is easy to generate a square wave

crystal diode operates in square law region of

it prevents frequency modulation

detector circuit is less complicated

⇒ For global communication, the number of satellites needed is

1

3

10

5

⇒ The range of value "

1 <

-1 <

⇒ The main advantage of TDM over FDM is

TDM requires more bandwidth than FDM

less complicated in hardware than FDM

better SNR

required filter

⇒ Schering bridge is used to measure

capacitance and dielectric loss

inductance

resistance

mutual inductance

⇒ When .4546 E 5 and .5433 E 7 are to be added in normalized floating point mode

none of the numbers is changed to any other form

.4546 E 5 is changed .004546 E 7 and .5433 E 7 is not changed

.5433 E 7 is changed to 54.33 E 5 and .4546 E 5 is not changed

both the numbers are changed and their exponents are made equal to 6

⇒ The number of memory locations in which 14 address bits can access is

1024

2048

4096

16384

⇒ In laboratory experiment the output from reflex klystron is moderated by square wave because

it is easy to generate a square wave

crystal diode operates in square law region of

*i*-*v*characteristicsit prevents frequency modulation

detector circuit is less complicated

⇒ For global communication, the number of satellites needed is

1

3

10

5

⇒ The range of value "

*a*" for which system will be stable. If impulse response of DT system is =*a**∪[*^{n}*n*]*a*> 1*a*< 11 <

*a*< ∞-1 <

*a*< 1