Question # 1

The output of a two input NOR gate is 1 when:

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A is 1 and B is 0

A is 0 and B IS 1

Both A and B are 0

Both A and B are 1

The half life of carbon -14 is:

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5730 years

5740 years

5750 years

5760 years

Which device has two coils, primary and secondary?

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D.C. Motor

Transformer

A.C. genrator

a and b

Which component is output device of computer?

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CPU

C.D

Keyboard

Monitor

The A.C. used in our houses has frequency _____ cycle/sec

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60

30

50

130

The step-up transformer

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Increases the input current

Increase the input voltage

Has more turns in the primary

Has less turns in hte secondary coil

The amount of current that causes the loss of muscle control is:

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0.1A

0.015A

2A

1A

Formula for time period of spring mass system is represented by:

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T = 2π√m/k

T = 2π √k/m

T = 1/2π√k/m

T = 1/2π√m/k

Safe limit of radiations exposure in one year.

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4 rem

5 rem

3 rem

6 rem

The direction of electric field lines due to positive charge is:

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A way from the charge

Towards the charge

Both a and b

None of these

1 KB = :

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1024 bytes

1024 KB

1024MB

None of these

If the intensity of faintest audible sound is Io and of another sound is I then sound level will be:

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K log Io/I

Log Io/I 2K

K log Io/I2

K log I/Io

When a ray of light enters from denser medium to rare medium, the angle of incidence for which angle of refraction is 90^o is called:

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angle of incidence

critical angle

angle of refrection

None of these

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