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Q1. | A frequency multiplier stage should operate as |

A. | class A [Wrong Answer] |

B. | class AB [Wrong Answer] |

C. | class C [Correct Answer] |

D. | either of the above [Wrong Answer] |

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

⇒ The minority carrier life time and diffusion constant in a semiconductor material are respectively 100 microsecond and 100 cm

^{2}/sec. The diffusion length is

0.1 cm

0.01 cm

0.0141 cm

1 cm

⇒ In a digital system there are three inputs ABC. Output should be high when atleast two inputs are high. Then output =

AB + BC + AC

ABC + ABC + A BC + ABC

AB + BC + AC

AB + BC + AC

⇒ A system has high gain and phase margin. The system is

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very stable and sluggish

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⇒ In envelope detection of an AM waveform

One side band and full-ampiitude carrier are needed

Both side bands and full-amplitude carrier are needed

Only two side bands are needed

Upper side band and part of carrier are needed

⇒

Match the following:

List I (μP) | List II (Number of bits in register) | ||
---|---|---|---|

A. | 8085 | 1. | 32 bit |

B. | 8086 | 2. | 16 bit |

C. | 68000 | 3. | 8/16 bit |

A-1, B-2, C-3

A-2, B-3, C-1

A-3, B-2, C-1

A-3, B-1, C-2

⇒ The difference between phase and frequency modulation

is purely of academic interest

lies in the different definitions of the modulation index

lies in the poor audio response of phase modulation

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⇒ For the circuit shown in the figure, the time constant RC = 1 ms. The input voltage is V

_{1}(

*t*) = 2 sin 10

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sin (10

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⇒ In 8085, which of the following registers cannot be paired?

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C

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⇒ Following state diagram shows clocked sequential circ

6

7

5

4

⇒ High frequency oscillations can be caused by

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magnetic coupling

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⇒ Consider a baseband binary PAM receiver shown below. The additive channel noise

*n*(

*t*) is whit with power spectral density S

_{N}(

*f*) = N

_{0}/2 = 10

^{-20}W/Hz. The low-pass filter is ideal with unity gain and cutoff frequency 1 MHz. Let Y

_{k}represent the random variable

*y*(

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10

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2 x 10

_{k}10^{10}10

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^{-10}2 x 10

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⇒ In figure, the effective capacitance between A and

2 μF

4 μF

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⇒ The power in the signal

40

41

42

82

⇒ For the transport lag G(

is constant

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⇒ The carrier mobility in a semiconductor is 0.4 m

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⇒ Binary 1111 when subtracted from binary 11111 is

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⇒ If two network is connected in series-parallel connection then

[

[Z] = [Z

none

⇒ The Boolean expression B⊕E is a simplified version of expression ABE + BCDE+ BC D E + A B D E + B C D E + A B D E then which of the following choice is correct?

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2 and 3 only

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data insufficient

⇒ In a CD the channel separation is

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1.6 μm

2.5μm

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⇒ Adder is a combinational logic circuit.

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⇒ A frequency multiplier stage should operate as

class A

class B

class AB

class C

⇒ The relative permeability is taken as unity for which of the following?

Air

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⇒ In a proportional plus integral control action

proportional gain K

proportional gain K

both proportional gain K

both proportional gain K

⇒ A negative-feedback closed-loop system is supplied to an input 5 V. The system has a forward gain of 1 and a feedback gain of 1 and a feedback gain of 1. What is the output voltage?

1.0 V

1.5 V

2.0 V

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⇒ The admittance parameter Y

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0.1 mho

-0.05 mho

0.05 mho

⇒ A

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C only

L only

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⇒ Which 8085 instruction causes exchange of contents of stack pointer with the contents of H L register pair?

⇒ The open loop gain of an amplifier is 200. If negative feedback with β = 0.2 is used, the closed loop gain will be

200

40

4.878

1.212

⇒ For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is Y. Y is give

A + (B + C) D

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none of these

⇒ In figure, the effective capacitance between A and

2 μF

4 μF

8 μF

10 μF

⇒ The power in the signal

*s*(*t*) = 8 cos (20 p - p/2) + 4 sin (15 p*t*) is40

41

42

82

⇒ For the transport lag G(

*j*ω) =*e*^{-jωT}, the phase angleis constant

varies linearly with frequency

varies linearly with low frequencies only

values as per square law

⇒ The carrier mobility in a semiconductor is 0.4 m

^{2}/Vs. Its diffusion constant at 300k will be (in m^{2}/s).0.43

0.16

0.04

0.01

⇒ Binary 1111 when subtracted from binary 11111 is

101110

10110

10000

100010

⇒ If two network is connected in series-parallel connection then

*h*= [*h*_{a}] + [*h*_{b}][

*a*_{a}] + [*b*_{b}][Z] = [Z

_{a}] - [Z_{b}]none

⇒ The Boolean expression B⊕E is a simplified version of expression ABE + BCDE+ BC D E + A B D E + B C D E + A B D E then which of the following choice is correct?

- don't care conditions doesn't exist
- don't care conditions exist
*d*( 16, 18, 20, 23, 27, 29) is the set of don't care conditions*d*( 16, 20, 22, 27, 29) is the set of don't care conditions

1 only

2 and 3 only

2 and 4 only

data insufficient

⇒ In a CD the channel separation is

1 μm

1.6 μm

2.5μm

4 μm

⇒ Adder is a combinational logic circuit.

TRUE

FALSE

⇒ A frequency multiplier stage should operate as

class A

class B

class AB

class C

⇒ The relative permeability is taken as unity for which of the following?

Air

Cobalt

Vacuum

Bismuth

⇒ In a proportional plus integral control action

proportional gain K

*is adjustable but integral time T*_{p}*is constant*_{i}proportional gain K

*is adjustable but integral time T*_{p}*is adjustable*_{i}both proportional gain K

*and integral time T*_{p}*are adjustable*_{i}both proportional gain K

*and integral time T*_{p}*are constant*_{i}⇒ A negative-feedback closed-loop system is supplied to an input 5 V. The system has a forward gain of 1 and a feedback gain of 1 and a feedback gain of 1. What is the output voltage?

1.0 V

1.5 V

2.0 V

2.5 V

⇒ The admittance parameter Y

_{12}in the 2 port network in the fi-0.2 mho

0.1 mho

-0.05 mho

0.05 mho

⇒ A

*dc*voltage source is connected across a series RLC circuit, Under steady state conditions, the applied*dc*voltage drops entirely across theR only

C only

L only

R and L

⇒ Which 8085 instruction causes exchange of contents of stack pointer with the contents of H L register pair?

`XTHL`

`PCHL`

`LHLD`

`MVIA`

⇒ The open loop gain of an amplifier is 200. If negative feedback with β = 0.2 is used, the closed loop gain will be

200

40

4.878

1.212

⇒ For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is Y. Y is give

A + (B + C) D

A + BC + D

A(BC + D)

none of these