Question # 1

The magnetism produced by electrons within an atom can arise from

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electrons orbiting the nucleus

electrons posses a spin

both motions

none of these motions

The direction of the linear momentum is the direction of

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speed

velocity

weight

none of them

X-rays can penetrate in a solid matte through a distance of several:

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Kilo metres

Metres

Centimeters

A few angstroms

One micrometer

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

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-4

4

2

1

The number of protons inside a nucleus is called

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mass number

atomic weight

atomic number

none of these

In a _____ flow, each particle of the fluid is called a streamline and different streamlines ______cross each other.

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Streamline, cannot

Turbulent, cannot

Streamline, can

None of these

According to the special theory of relativity

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mass and energy are same entities

mass and energy are same entities but interconverible

mass and energy are different entities but interconverible

mass and energy are different entities but non-interconveritble

The product of induced current and the resistance of the wire through which the current is passing is called:

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Electromagnetic induction

induced emf

Induced current

Self induced

None of these

The unit of magnetic flux is

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Weber-m²

Weber-m³

Henry

Weber

What is the coefficient of mutual inductance, when the magnetic flux changes by 2 X 10^-2Wb, and change in current is 0.01 A?

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2 H

3 H

1/2 H

Zero

In the equation E=mc² value of c is?

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186000 miles per hour

186000 miles per sec

3 X 10⁸m/sec

Both A and C

Both B and C

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

The efficiency of a practical heat engine:

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Can be 100%

Can not be 100%

Is always Zero

None of these

A projectile on its path gets divided into two pieces at its highest point.Which is true?

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Momentum increases

Momentum decreases

Kinetic energy increases

Kinetic energy decreases

The band full of electrons, which donot play any part in the conduction process is known as

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Conduction band

Forbidden energy band

Valence band

Completely filled band

Tick which of the following is not state variable:

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Heat energy

Pressure

Entropy

Volume

Huygen's principle is used to study the

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formation of wavefronts

propagation of wavefronts

nature of light

speed of light

The critical temperature of tin is

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1.18 K

4.2 K

3.72 K

7.2 K

The bands below the valence band are

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completely filled and play active part in conduction process

completely filled and plays no part in conduction process

not completely filled and play active part in conduction process

not completely filled and play no part in conduction process

Work energy principle is the work done on the body is equal to

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Change in power

Change in K.E.

Change in acceleration

Change in angular velocity

Unit of dielectric constant of medium is

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Coulombs /Newton-meter

Newton-meter²/coulomb²

coulomb²/ (Newton-meter)²

None of the above

Position vector is a vector, which describes the

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Location of a point with respect to origin

Location of point with respect to any point

Location of a point with respect to some related point

None of these

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