Question # 1

The dimension of linear inertia is:

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MLT²

ML⁰T^-2

ML⁰T⁰

MLT^-1

Resistor is a device which convert electric energy to

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Heat energy

Chemical energy

Elastic energy

All of the above

The pointer of a magnetic compass:

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Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

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The upper half of the image is cut off

The brightness of the image is reduced

The brightness of the image is increased

No effect at all

Different radioactive material have

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same half lives

different half lives

same mean lives

same total lives

Which of the following is an example of a S.H.M?

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motion of a projectile

motion of a train along a circular path

motion of swing

electrons revolving sound the nucleus

Origin of the electric and the gravitational forces

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Was known in 1911 A.D.

Was known in 1811 A.D.

Was known in 1711 A.D.

is still unknown

Was known in 1611 A.D.

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

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-2 mv

Zero

2 mv

mv

Tick the conservation force:

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Tension in a string

Air resistance force

Elastic spring

Frictional force

The fluid is incompressible, if itsdensity is

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zero

constant

very high

very small

The quantity have dimension of ML²T⁰²will have SI unit of:

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Watt

Newton

Joule

Metre

Moment of inertia of thin rod is

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1/2 mL²

1/6 mL²

1/12 mL²

1/15 mL²

The typical speed of reconnaissance jet (SR-71) is

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900 ms^-1

950 ms^-1

980 ms^-1

990 ms^-1

When the speed of a moving body is doubled

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Its P.E. is doubled

Its acceleration is doubled

Its K.E. is doubled

Momentum is doubled

Is Boyle's law is applicable, to the isothermal process

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No

Yes

Some what applicable

None of these

Viscosity of air at 30^oC in Nsm^-2

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0.015 × 10^-3

0.019 × 10^-3

0.151 × 10^-3

0.0179 × 10^-3

When the fuel ignited it turns to a gas at

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Low pressure

High pressure

Extremely high pressure

None of these

Impulse is the force applied for a very short interval time in which force is

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Constant

Not constant

May be constant for some time

None of these

The light from the sun reaches to earth with wavefronts

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Spherical

Cylindrical

Plane

None of these

When brakes are applied to a fast moving car, the passengers will be thrown:

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Forward

Backward

Downward

None of these

If force of friction is negligible, then acceleration of two free falling objects of different masses is

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The same

Different

Smaller mass has smaller acceleration

None of these

The dimensions of Planck's constant is equal to that of

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Energy

Momentum

Angular momentum

Power

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