Question # 1

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

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Fringe width will decrease

Fringe width will increase

Fringe width will remain unchanged

Fringe will become less intense

Radio telescope is used to gather information from

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Earth

Moon only

Far side of the universe

Sea water

Significant figures in 0.0010 are:

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Four

Three

Two

One

The current sensitivity of the galvanometer is

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C/BAN

BAN/C

CAN/B

CBN/A

A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:

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Radius of the circle

Twice the radius

Thrice the radius

None of these

The nucleus left after the emission of some radiation is called:

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Parent nucleus

Daughter necleus

Mother necleus

Any of these

None of these

Energy is not carried by

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Transverse progressive waves

Longitudinal vibration

Stationary waves

Electromagnetic

A device which converts Electrical energy into mechanical energy is called as

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Transformer

Generator

Motor

All of these

Acceleration of a body is positive, if the velocity of the body is

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constant

increasing

decreasing

none of them

The study of physics involves?

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Structure of space and time

Interaction of electromagnetic radiation with matter

Both of them

Chemical changes

None of them

Bernoulli's equation is the fundamental equation in fluid dynamics, which relates pressure to fluid

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speed

height

none of them

both of them

In Bernoulli's equation, the work done due to fluid is

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A lens behaves as a converging lens in air and a diverging lens in water the refractive index of the material is

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Equal to unity

Equal to 1.33

Between unity and 1.33

Greater than 1.33

The smallest part of a crystal lattice is called:

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A molecule

An atom

A unit cell

A particle

Under same environment the measurement of a physical quantity gives different values. The error in measurement is called

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Random error

Systematic error

Physical error

Uncertainty

In projectile motion when a body is projected upward it must have

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Initial velocity

Angle θ < 90^o

Falling under gravity

All of these

A straight current carrying conductor experiences maximum forces in a uniform magnetic field when it is placed:

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Parallel to the field

Perpendicular o the field

At an angle of 45 to the field

None of these

The word fluid means

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To rise

To fall

To flow

To oppose

The work done in taking a particle from the floor to a table depends on

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The actual path taken

The time taken in this work

The speed of the particle

The height of the table

The effect is to increase the inflation the bag is

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To compress the blood vessels

To increase external pressure

To cut off the flow of blood

All of these

The principle of rocket motion is based on the

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First law of motion

Second law of motion

Third law of motion

None of these

If 'd' 'm' and fringe spacing ΔY are known, the interference effect due to light of λ

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Cannot be determine

Can be determined in same cases

Can be determined

None of these

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