Q.1

If+=how much is+ 672?

  • 534
  • 1403
  • 1623
  • 1513
Q.2

A sphere with charge Q was placed in, but not touching a larger hollow sphere. If there is any charge initially on the outer sphere; to remove it the outer sphere was earthed momentarily, and then the inner sphere was removed. The charge remaining on the outer sphere was then measured. This charge was found to be __________ to the charge on the inner sphere.

  • equal and of same again
  • equal and of opposite sign
  • unequal and of same sign
  • unequal and of opposite sign
Q.3

A certain JK FF has tpd =nsec. The largest MOD counter that can be constructed from these FFs and still operate up toMHz is

  • any
  • 8
  • 256
  • 10
Q.4

Four messages band limited to W, W,andrespectively are to be multiplex using Time Division Multiplexing (TDM). The minimum bandwidth required for transmission of this TDM signal is

  • W
  • 3W
  • 6W
  • 7W
Q.5

A periodic voltage has following values for equal time intervals changing suddenly from one value to next :--etc.
RMS value of the waveform is :

  • 31 v
  • 32 v
  • insufficient data
  • none of these
Q.6

The number of product terms in the minimized sum of product expression obtained through the following k map is (where "d" denotes don't care states)

  • 2
  • 3
  • 4
  • 5
Q.7

Which of the following terms are equivalent?

  1. A ⊕ B ⊕ C
  2. A ⊕ B ⊙ C
  3. A ⊙ B ⊕ C
  4. A ⊙ B ⊙ C
  • 1 and 4; 2 and 3
  • 1 and 3
  • 2 and 3
  • 1, 2 and 4
Q.8

A periodic voltage has following values for equal time intervals changing suddenly from one value to next :--etc.
RMS value of the waveform is :

  • 31 v
  • 32 v
  • insufficient data
  • none of these
Q.9

If A = then |A50| will be

  • (1 - 1002)
  • (1 - 502)
  • (1 - 1002)
  • (1 - 502)
Q.10

Which of the following terms are equivalent?

  1. A ⊕ B ⊕ C
  2. A ⊕ B ⊙ C
  3. A ⊙ B ⊕ C
  4. A ⊙ B ⊙ C
  • 1 and 4; 2 and 3
  • 1 and 3
  • 2 and 3
  • 1, 2 and 4
Q.11

Which of the following terms are equivalent?

  1. A ⊕ B ⊕ C
  2. A ⊕ B ⊙ C
  3. A ⊙ B ⊕ C
  4. A ⊙ B ⊙ C
  • 1 and 4; 2 and 3
  • 1 and 3
  • 2 and 3
  • 1, 2 and 4
Q.12

Which of the following terms are equivalent?

  1. A ⊕ B ⊕ C
  2. A ⊕ B ⊙ C
  3. A ⊙ B ⊕ C
  4. A ⊙ B ⊙ C
  • 1 and 4; 2 and 3
  • 1 and 3
  • 2 and 3
  • 1, 2 and 4
Q.13

The following series RLC circuit with zero initial conditions is excited by a unit impulse function δ(t).

For t >the output voltage Vc (t) is

Q.14

The following series RLC circuit with zero initial conditions is excited by a unit impulse function δ(t).

For t >the output voltage Vc (t) is

Q.15

A periodic voltage has following values for equal time intervals changing suddenly from one value to next :--etc.
RMS value of the waveform is :

  • 31 v
  • 32 v
  • insufficient data
  • none of these
Q.16

A periodic voltage has following values for equal time intervals changing suddenly from one value to next :--etc.
RMS value of the waveform is :

  • 31 v
  • 32 v
  • insufficient data
  • none of these
Q.17

If A = then |A50| will be

  • (1 - 1002)
  • (1 - 502)
  • (1 - 1002)
  • (1 - 502)
Q.18

The following series RLC circuit with zero initial conditions is excited by a unit impulse function δ(t).

For t >the output voltage Vc (t) is

Q.19

If A = then |A50| will be

  • (1 - 1002)
  • (1 - 502)
  • (1 - 1002)
  • (1 - 502)
Q.20

The following series RLC circuit with zero initial conditions is excited by a unit impulse function δ(t).

For t >the output voltage Vc (t) is

Q.21

In a JK flip-flop, J is connected to Q and K is connected to Q outputs. The JK FF converts into a

  • RS FF
  • D FF
  • T FF
  • Clocked RS FF
Q.22

In a transmission line terminated with a load equal to the characteristic impedance, the reflection coefficient is

  • 0
  • +1
  • -1
  • Infinity
Q.23

A point charge of 6 μC is located at the origin, uniform line charge density ofnC/m of 8 m length lies along the x axis and a uniform sheet of charge equal tonC/m2 of area p x 42 lies in the z = 0 plane. Calculate total electric flux leaving the surface of sphere of 4 m radius centered at origin.

  • 86.97 μC
  • 8.697 nC
  • 8.697 μC
  • 86.97 nC
Q.24

Use block diagram reduction methods to obtain the equivalent T.F from R to C.

Q.25

An electrical system and its signal-flow graph representation are shown in figure (a) and (b) respectively

The values of G2 and H, respectively are

Q.26

Use block diagram reduction methods to obtain the equivalent T.F from R to C.

Q.27

An electrical system and its signal-flow graph representation are shown in figure (a) and (b) respectively

The values of G2 and H, respectively are

Q.28

Use block diagram reduction methods to obtain the equivalent T.F from R to C.

Q.29

Find current flowing through 1 H inductor at t =at which switch 'S' is opened.

  • 0
  • 2
  • 3
  • 5
Q.30

An electrical system and its signal-flow graph representation are shown in figure (a) and (b) respectively

The values of G2 and H, respectively are

Q.31

An electrical system and its signal-flow graph representation are shown in figure (a) and (b) respectively

The values of G2 and H, respectively are

Q.32

Use block diagram reduction methods to obtain the equivalent T.F from R to C.

Q.33

Find current flowing through 1 H inductor at t =at which switch 'S' is opened.

  • 0
  • 2
  • 3
  • 5
Q.34

Use block diagram reduction methods to obtain the equivalent T.F from R to C.

Q.35

Find current flowing through 1 H inductor at t =at which switch 'S' is opened.

  • 0
  • 2
  • 3
  • 5
Q.36

The maximum effective aperture of an antenna which is operating at wavelength of 2 m and has a directivity ofis __________ .

  • 15.92
  • 31.84
  • 3.184
  • 1.592
Q.37

Consider following statements :

  1. Maximum energy of electrons liberated photoelectrically is independent of light intensity
  2. Maximum energy of electrons liberated photoelectrically varies nonlinearly with frequency of incident light.
  • statement (1) is true and (2) is false
  • statement (1) and (2) both are true
  • statement (1) is false and (2) is true
  • statement (1) and (2) both are false
Q.38

If the function A, B are A = R + PQ + RS B = PQRS + PQRS + PQRS
Which of the following is true?

  • A = B
  • A = B
  • no direct relation between A and B
  • insufficient data
Q.39

A speech signal, band limited to 4kHz and peak voltage varying between +and -is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits. Assuming the signal to be uniformly distributed between its peak values, the signal to noise ratio at the quantizer output is

  • 156 dB
  • 32 dB
  • 48 dB
  • 64 dB
Q.40

The fourier transform of a voltage signal x(t) is X(f). The unit of X(f) is __________ .

  • volts
  • volt2
  • volt/sec
  • volt-sec
Q.41

(9)11 x (9)13 x(9)15 = (?)16

  • 933
  • 2D9
  • 339
  • 9AB
Q.42

A silicon PN junction with no bias have a doping concentration of
Nd = 2 x 1016 cm-3 and Na = 1016 cm-3. The space charge width is:

  • 3.345 x 10-3 cm
  • 3.345 x 10-4 cm
  • 3.345 x 10-5 cm
  • 3.345 x 10-6 cm
Q.43

The signal y(t) = x(- t) is __________ .

  • causal
  • non-causal
  • depends on x(t)
  • none of these
Q.44

Inmicroprocessor system, what will be the total delay provided by the following loop.
MVI A, 11H
LXI B, 12FFH
Delay: DCX B
XTHL
NOP
XRA B
JNZ Delay

where system clock is operating at 3 MHz.

  • 3.154 msec
  • 3.514 msec
  • 2.644 msec
  • 3.166 msec
Q.45

A speech signal, band limited to 4kHz and peak voltage varying between +and -is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits. The number of quantization levels required to reduce the quantization noise by a factor of 4 would be

  • 1024
  • 512
  • 256
  • 64
Q.46

A diode detector load consists of 0.μF capacitor in parallel with a 5 k ohms resistor. The maximum depth of modulation without diagonal clipping at modulating frequency ofHz andkHz is

  • 0.76, 0.24
  • 0.95, 0.3
  • 0.24, 0.76
  • 0.3, 0.95
Q.47

InWhenever a signal is received at TRAP terminal its program execution is transferred to a subroutine on address __________ .

  • 0000 H
  • 0024 H
  • 002 CH
  • provided by the address generation logic
Q.48

If (225)Y = (165)8 find value of Y

  • 7
  • 8
  • 9
  • 11
Q.49

The ratio of condition current density to displacement current density for a good conductor and a good dielectric is respectively __________ .

  • greater than 1, greater than 1
  • greater than 1, less than 1
  • less than 1, less than 1
Q.50

The distance between target and radar is reduced to half. Power received increases by

  • 1/16
  • 1/4
  • 4 times
  • 16 times
0 h : 0 m : 1 s