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Q1. | Match the following:
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A. | A-3, B-4, C-1, D-2 [Wrong Answer] | ||||||||||||||||||||

B. | A-4, B-3, C-2, D-1 [Correct Answer] | ||||||||||||||||||||

C. | A-4, B-3, C-1, D-2 [Wrong Answer] | ||||||||||||||||||||

D. | A-1, B-2, C-3, D-4 [Wrong Answer] | ||||||||||||||||||||

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⇒ The main drawback in the performance of shunt peaked wide band amplifier is

two low gain at low frequency

poor phase response

reduce frequency at middle frequency

that the maximum gain of the stage is small

⇒ Primary advantage of a crystal oscillator is that

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it gives a high O/P voltage

its frequency of oscillation remains almost constant

it operates on a very low dc supply voltage

⇒ For a BJT, under the saturation region.

I

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I

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I

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⇒ A circuit is fed by two sources of different frequency and magnitudes 100 ∠0° V and 50 ∠30°V. The current in a particular branch is 10 ∠20° A. If the magnitudes of the sources are changed to 200 ∠0° V and 100 ∠0° V, the current in that branch should be

20 ∠20° A

10 ∠20° A

14.14 ∠20° A

10 ∠- 20° A

⇒ On load tap changer using thyristors can have a maximum of two taps.

TRUE

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⇒ Two sinusoidal waves 1 and 2 have peak values V

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⇒ If temperature increases by about 50°, the resistance of thermistor changes to

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twice of its initial value

eight times of its initial value

one eight of its initial value

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the phase of input and output signal is identical

no signal is applied to the input

the transistor is unbiased

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RC coupling

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transformer coupling

either (b) or (c)

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perfect insulator

conductor

slightly conducting

any of the above

⇒ The traffic-handling capacity of an Earth station on the uplink depends on

its EIRP

satellite antenna gain

noise associated with the satellite

all of the above

⇒ Current chopping leads to

over voltage

over current

both over voltage and over current

either over voltage or over current

⇒ The integral of a unit impulse is unit step function.

TRUE

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- In LED, the light energy radiated due to recombination with the aid of traps.

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1, 2 and 3

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⇒ The multivibrator circuit that has a typical application of converting sinusoidal input into a square wave output is

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monoshot multivibrator

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