Question # 1

When we consider the average velocity of a body, then the body is moving in

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straight line

curved path

may be in a straight or curved path

none of them

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

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11/3 A

3 A

3/11 A

6

The special theory of relativity is based on:

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Four postulates

Three postulates

Two postulates

One postulate

None of these

The pressure will be low where the speed of the fluid is

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Zero

High

Low

Constant

The charge carriers in gases are

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electrons

ions

protons

ions and electrons

The device which allows only the flow of an A.C. through a circuit is

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Capacitor

Inductor

D.C. motor

Battery

An LED emits light when it is:

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Forward biased

Reverse biased

Operated without battery

Operated with heat source

None of these

Which of the following options correctly states the equation of continuity for an ideal fluid?

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A₁A₂= V₁V₂

A₁/A₂= V₂/V₁

A₁/A₂= V₁/V₂

none of the above

Certain charge +q is placed at the center of a sphere. At each of the sphere,The directions of electric intensity and vector area are:

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Same

Different

Opposite to each other

At 60º with each other

Both (B) and (C)

The wave form of SHM is

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Pulsed wave

Square wave

Triangular waved

Sine wave

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

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n/AL

Al/n

nAL

nA/L

The pressure will be low where the speed of fluid is

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Zero

High

Low

Constant

The optical fibre is covered for protection with

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rubber jacket

plastic jacket

steel jacket

copper jacket

Bernoulli s equation applicable in the case of

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Streamlined flow of compressible fluids

Streamlined flow of incompressible fluids

Turbulent flow of compressible fluids

Two substances having the same crystal structure are called:

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Isomorphism

Subtance

Allotropic subtances

Polymorphous substances

Blood is an/a

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Ideal fluid

Perfect fluid

Compressible fluid

Incompressible fluid

Angle between ray of light and the corresponding wavefront is:

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0°

60°

90°

120°

1 torr = --------------------

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1.20 Nm^-2

1.38 Nm^-2

1.33 Nm^-2

1.31 Nm^-2

The gravitational acceleration decreases inversely as the distance from the centre of the Earth is

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Square

One time

Three times

None of these

When a plane polarized light is passed through certain crystals they

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Are totally absorbed

Are totally reflected

Rotate the plane of polarization

None of these

The SI units of impulse are

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Nm

Nm²

Nm^-1

Ns

The property due to which the size or shape of a lattice is not important is called

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Cleavage

Anisotropy

Homogenity

None of these

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