Question # 1

When current passes through a solenoid coil, it behaves like a

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loop

circle

bar magnet

none of these

During the whole carnot cycle

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Thermal equilibrium is maintained

mechanical equilibrium is maintained

both the thermal and mechanical equilibriumis maintained

both the thermal and mechanical equilibrium is not maintained

The resonance will be sharp, if the amplitude decreases rapidly at a frequency

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equal to the resonant frequency

slight different from the resonant frequency

greatly different from the resonant frequency

any one of them

The motion of a projectile is

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one dimension

two dimension

three dimension

all of them

The positron was discovered by:

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In cosmic radiation

In 1932

By Carl Anderson

All above

By direc

OP-AMP has the following input terminals

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one

two

three

four

Amplitude in SHM is equivalent to_____ in circular motion:

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Diameter

Radius

Circumference

None of these

Michael Faraday and Joseph Henry belong respectively to

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USA and England

England and France

England and USA

USA and France

None of these

The substance in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero,are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

Depletion region contains:

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Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

Which of the following waves are more energetic

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radio waves

infrared waves

ultraviolet

γ-rays

The conduction band in a solid

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may be empty

cannot be empty

should be filled

all of them

Satellites are objects that orbit around the

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Sun

Planet

Earth

None of these

In an inertial frame of reference the weight of body equal to

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Force of attraction

Coulomb's force

Force of gravity

All of these

The escape velocity of a body depends upon

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The mass of the body

The mass of the planet

Volume of body

Density of body

In Bragg's formula, the path difference should beam integral multiple of the wavelengths

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d sin θ = nλ

d sin 2θ = nλ

2 d sin θ = nλ

None of these

The light from the sun reaches to earth with wavefronts

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Spherical

Cylindrical

Plane

None of these

Newton's third law says, that the action and reactions are

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Equal but in the same direction

Equal but in opposite direction

May be unequal but in the same direction

May be unequal but in opposite direction

Bulk modulus for mercury is

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27

29

29.4

30

The diameter of an optical fibre with its protective case may be typically

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7.62 cm

67.62 mm

6.0 mm

90 mm

Shear modulus for aluminium is

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30

70

80

90

When a horse pulls a cart.the force that makes the horse run forward is the force exerted by

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The horse on the ground

The horse on the cart

The ground on the horse

The ground on the cart

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