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Q1. | A radio frequency signal contains the following three frequencie |

A. | Push pull amplifier [Wrong Answer] |

B. | Wideband amplifier [Wrong Answer] |

C. | Audio frequency amplifier [Wrong Answer] |

D. | Tuned voltage amplifier [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 :**

⇒ Computer virus is a piece of rough software of unknown origin that

copies itself like a breeding germ

spreads from one machine to another

eats away processing power

all of the above

⇒ The nodal method of circuit analysis is based on

KVLs, ohm law

KCLs, ohm law

KCLs, KVL

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⇒ RMS value of

*i*(

*t*) = 10[1 + sin (-

*t*)] is

10

10/2

l50

102

⇒ Which one of the following rules determines the mapping of

*s*-plane to

*z*-plane?

Right half of the s-plane maps into outside of the unit circle in

*z*-plane

Left half of the

*s*-plane maps into outside of the unit circle.

Imaginary axis in

*s*-plane maps in to the circumference of the unit circle.

All of the above

⇒ Which variety of copper has the best conductivity?

Pure annealed copper

Hard drawn copper

Induction hardened copper

Copper containing traces of silicon

⇒ Two port circuits are connected in parallel. To determine the response, it is more convenient to use

O.C. impedance parameters

S.C. admittance parameters

ABCD parameters

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⇒ If the diameter of a wire is doubled, its current carrying capacity becomes

one-fourth

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four times

⇒ For a rectangular waveguide (

*a*x

*b*,

*a*>

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*b*< λ < 2

*b*; λ > 2

*a*

*b*< λ < 2

*b*; λ < 2

*a*

*a*< λ < 2

*b*; λ < 2

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*b*; λ > 2

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⇒ The capacitance of a capacitor is not affected by

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thickness of plates

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⇒ In what range should Re(

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*e*

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Re(

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Re(

*s*) >

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Re(

*s*) <

*a*

Re(

*s*) >

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⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | Horn antenna | 1. | High directivity |

B. | Parabolic antenna | 2. | Very high directivity |

C. | Lens antenna | 3. | Moderate directivity |

A-1, B-2, C-3

A-3, B-2, C-1

A-3, B-1, C-2

A-1, B-3, C-2

⇒ What will be minimum conversion rate in 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).

9000

9259

1000

1000

⇒ A complementary symmetry amplifier has

1 P-N-P and 1 N-P-N transistor

2 P-N-P transistor

2 N-P-N transistor

2 P-channel FETs

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**Assertion (A):** Impulse function is an important function in network analysis.

**Reason (R):** Convolution integral enables us to find the response of a network to an arbitary input in terms of the impulse response.

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 angle subtended by earth at geostationary communication satellite is

17.34°

51.4°

120°

60°

⇒ In a bipolar junction transistor a

_{dc}= 0.98, I

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635 mA

735 mA

835 mA

935 mA

⇒ A quarter wave line open circuited at far end behaves as

inductance

L and C in parallel

capacitance

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⇒ DeMorgan's first theorem is =

A . A = 0

A = A

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⇒ A Colpitt's oscillator uses

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an inductor and two capacitors

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either (a) or (b)

⇒ Tellegen's theorem is applicable to

circuits with passive elements only

circuits with linear elements only

circuits with time invariant elements only

circuits with active or passive, linear or nonlinear and time invariant or time varying elements

⇒ Consider the following expression for the driving point imped

2 and 4

1 and 3

1 and 4

2 and 3

⇒ The open loop gain of an amplifier is 50 but likely to decrease by 20% due to various factors. If negative feedback with β = 0.1 is used, the change in gain will be about

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0.02

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0.0005

⇒ A mobile telephone has a range of about

50 km

10 km

1 km

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⇒ The radiation resistance of a circular loop of one turn is 0.01 ohm. For 5 turn loop the radiation resistance is

0.002 Ω

0.01 Ω

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⇒ A power factor meter has

one current and one pressure circuit

one current circuit and two pressure circuits

two current circuits and two pressure circuits

two current circuits and one pressure circuit

⇒ The multiplier resistance and meter coil in a voltmeter are in

series

parallel

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⇒ VSWR = E

*/E*

_{max}*.*

_{min}TRUE

FALSE

⇒ A 4 bit ripple counter uses flip flops with propagation delay of 50 ns each. The maximum clock frequency which can be used is

5 MHz

10 MHz

20 MHz

25 MHz

⇒ The core of a coil has a length of 10 cm. The self inductance is 8 mH. If the core length is doubled, all other quantities remaining the same, the self inductance will be

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16 mH

8 mH

4 mH

⇒ VTM stands for voltage tunable magnetron.

TRUE

FALSE