Question # 1

At resonance frequency the impedance of parallel resonance circuit is

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Maximum

Minimum

Zero

None of the above

Mathematical manipulation of the two quantized states can be best carried if they are represented by

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high - low

yes - no

on - off

0 - 1

The bridge circuit of full wave rectification uses

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one diode

two diode

three diode

four diode

The average of A.C. current and voltage over a complete cycle is

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Maximum

zero

Neither zero nor maximum

None of these

In a transistor, if the central region is p-type then this type of transistor is known as

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p-n-p transistor

n-p-n transistor

either of these

none of these

The amplifier which us used to perform mathematical operations electronically is known as

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calculator

OP-AMP

computer

any one of them

The device which allows only the flow of an A.C. through a circuit is

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Capacitor

Inductor

D.C. motor

Battery

When the pn-junction is forward biased. the current flows through it is of the order of

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mili-amperes

amperes

nano-amperes

micro-amperes

Chock consumes externally small

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Charge

Current

Power

Potential

When the emitter-base junction of a transistor is reverse biased, collector current

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Reverses

Increases

Decreases

Stops

For a n-p-n transistor, the conventional current equation can be written as

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I_E+ I_C= I_B

I_C- I_B= I_E

I_C+ I_B= I_E

I_B+ I_E= I_C

The power factor of resonant series circuit is

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1

0

-1

0.5

An A.C varies as a function of

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Current

Voltage

Time

Charge

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

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Instantaneous value

RMS value

Value averaged over a cycle

Either (B) or (C)

Either (A) or (C)

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

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2nd group

fourth group

fifth group

sixth group

SI unit of impedance is

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hertz

henry

ampere

ohms

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