Question # 1

LDR can act as:

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Diode

Switch

Transistor

Rectifier

The power of small fan is:

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40 W

50 W

60 W

80 W

The refractive index of air is:

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6

7

2

1,0003

The converter of analogue to digital signal is:

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ADC

DAC

ATDC

None of these

The value or current I passing through a conductor is inversely proportional to:

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Temperature

Potential difference

e.m.f.

resistance

Electric current in conductors is due to the flow of:

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Positive ions

Negative ions

Positive charge

Free electrons

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral particle

Repels a neutral particle

Which is the most suitable means of reliable continuous communication between an orbiting satellite and Earth?

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Microwaves

Radio waves

Sound wave

any light waves

The equivalent resistance in parallel combination is:

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R_c=R₁+R₂+R₃ +.................+R_n

R_c=1/R₁+1/R₂+1/R₃+.................+1/R_n

a and b

None of these

The device which converts digital quantities into analog quantities is called:

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ADC

DAC

ACD

CAD

A digital multimeter is used to measure:

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Current

Resistance

Potential difference

All of above

If 2 joules of energy is required to transfer one coulomb of charge from one point to another, the potential difference between these points will be:

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1V

2V

4V

6V

When a heavy nucleus splits into, lighter nuclei, the process would .

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Release nuclear energy

Absorb nuclear energy

Release chemical energy

Absorb chemical energy

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