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Q1. | For the single rectangular pulse of the given fi |

A. | TRUE [Correct Answer] |

B. | FALSE [Wrong Answer] |

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

⇒ In the given figure the phase angle of F

*n*is either 0 or &

TRUE

FALSE

⇒

**Assertion (A):** The maximum efficiency of a class B push pull amplifier is 78.5%

**Reason (R):** A current mirror uses a compensating diode in parallel with the emitter diode

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

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

A is correct R is wrong

A is wrong R is correct

⇒ In figure the total inductance of the circui

L

_{1}+ L

_{2}

L

_{1}+ L

_{2}- M

L

_{1}+ L

_{2}- 2M

L

_{1}+ L

_{2}+ M

⇒ A 4 bit synchronous counter has flip flops having propagation delay of 50 ns each and AND gates having propagation delay of 20 ns each. The maximum frequency of clock pulses can be

20 MHz

50 MHz

14.3 MHz

5 MHz

⇒

Match the following:

List I (Properties) | List II (Relations) | ||
---|---|---|---|

A. | Linear but NOT time-invariant | 1. | y(t) = t^{2}x(t) |

B. | Time-invariant but NOT linear | 2. | y(t) = t |x(t)| |

C. | Linear and time invariant | 3. | y(t) = |x(t)| |

4. | y(t) = x(t - 5) |

A-1, B-3, C-4

A-2, B-3, C-4

A-3, B-1, C-2

A-1, B-2, C-3

⇒ In most of instruments, the controlling torque is provided by

fluid fraction

spring

eddy current

either (a) or (c)

⇒ In a bipolar transistor, emitter efficiency is about

0.99

0.9

0.8

0.7

⇒ For a second order system, the position of poles is in the shaded region shown in the given figure. The variation in damping facto

from 0 to 1

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from 1 to 5

from 0 to 3

⇒ The

*z*transform of sequence

*x*[

*n*] = {2, 4, 3, 2}

2

*z*

^{-1}+ 4

*z*

^{-2}+ 3 + 2

*z*

^{+1}

2

*z*

^{-1}+ 3 + 4

*z*

^{+1}+ + 2

*z*

^{+2}

2

*z*

^{+1}+ 3

*z*

^{-1}+ 4

*z*

^{-2}+ 2

*z*

^{-3}

3 + 2

*z*

^{-1}+ 4

*z*

^{-2}+ 2

*z*

^{-1}

⇒ A directional coupler is used

to transmit microwave signals

to generate microwave signals

to measure amplitude and phase of a travelling wave

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⇒ Which of the following instruments is used almost exclusively to measure radio frequency currents?

Moving coil

Rectifier

Moving iron

Thermocouple

⇒ In the op-amp circuit of figure, V

_{010 V-10 V5 V-5 V}

⇒ A dc chopper V = 500 V feeds an electric fraction dc series motor. The chopping frequency is 400 Hz. The series inductance required to limit the maximum current swing to 10 A is

20 mH

about 31 mH

about 51 mH

about 92 mH

⇒ Find V

_{th}in the cir

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10 V

0 V

5 V

⇒ Which one is correct option about ROC?

ROC does not contain any pole

ROC of finite duration sequence is entire plane expect

*z*= 0,

*z*= ∞

*a*and

*b*

only

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⇒ The signal input to a given amplifier is made up of 100 mΩ signal power and 1 mΩ noise power. The amplifier contributes an additional 100 mΩ of noise and has a power gain of 20 dB. The noise factor is

1

1.5

2

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⇒ Consider the following differences between QPSK and MSK

- The side lobes in MSK are relatively much smaller in comparison to the main lobe
- The spectrum of MSK has a main centre lobe which is 1.5 times as wide as the main lobe of QPSK
- The waveforms of both MSK and QPSK exhibit phase continuity

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1, 2 and 3

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⇒ In 8085 microprocessor, what is the length of temporary register?

6 bits

8 bits

12 bits

16 bits

⇒ An electrical network with 8 independent nodes will have __________ nodal equations.

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6

7

8

⇒ Consider the following statements, SWR of a transmission line is infinite when the load is

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- a complex impedance
- an open circuit
- a pure reactance

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2, 3, 4

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⇒ The number of digits in octal system is

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7

9

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⇒ A broadside array consisting of 200 cm wavelength with 10 half-wave dipole spacing 10 cm. And if each array element feeding with 1 amp. current and operating at same frequency then find the radiated power

730 W

73 W

100 W

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Multiply

Add

Shift

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⇒ Ferrites have

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low eddy current loss

low resistivity

higher specific gravity compared to iron

⇒ For a = - 1, find the value of V

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⇒ For 200V r.m.s. value triangular wave, the peak voltage will be

200 V

222 V

280 V

346 V

⇒ The input gate current of FET is closer to

few amperes

few milli amperes

few microamperes

negligibly smaller value

⇒ The spectral component of noise associated with

*k*

^{th}frequency is given, in the limit as Δ

*f*→ 0 by

*n*(

_{k}*t*) written as

*n*(

_{k}*t*) = C

_{k}cos (2p

*k*Δ

*ft*+ θ

_{k1, 2 only1, 3 only1, 2, 32, 3 only}

⇒ If A = 3 +

*j*1 and B = 4 +

*j*3, A - B =

8.062 ∠29.7°

10 ∠45°

2.236 ∠243.43°

6.72 ∠243.43°

⇒ For an

*m*-derived filter, attenuation is infinite when

*f*=

*f*

_{∞}.

TRUE

FALSE