Question # 1

Watt is equal to:

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Coulomb per second

Newton per second

Volt per second

Joule per second

A and B are the two inputs of a NOR gate. Its output would be 1 when:

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A = 1, B = 1

A = 0 , B = 1

A = 1, B = 0

A = 0 , B = 0

When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate:

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The rod and the paper are oppositely charged

The rod acquires a positive charge

The rod and the paper have the same charges

The rod acquires a negative charge

Which instrument measures the potential difference:

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Voltmeter

Barometer

Galvanometer

Ammeter

The turn ratios of a transformer is 10. It means.

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I_s = 10I_p

N_s = N_p

N_s = 10 N_p

V_s =V_p /10

The ratio of external force applied on the spring to displacement is called:

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Hook's law

Constant

Spring constant

The value of refractive index of water is:

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2.33

1.36

1.33

1.39

The line which passes through pole of the mirror and center of curvature is called principal:

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axis

Focus

Line

None of these

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

A current carrying conductor produces a field around it is called:

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Electric field

Magnetic field

Both a and b

None of these

The screen of a cathode ray tube consists of a thin layer of:

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Sodium

Nitrogen

Oxygen

Phosphorus

Electronics is a branch of:

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Mass

Applied Physics

Mechanics

Nuclear Physics

The focal length is related to radius of curvature by the formula:

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f = 2R

f = 4R

f = R/2

R = f/2

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