Question # 1

The value of relative permittivity of different dielectrics are:

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Equal

Different

Greater than one

Smaller than one

Both (B) and (C)

An axis of rotation

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Is a straight line

Is normal to the plane of rotation

Passes through pivot point O

All of them

The closed loop gain of the inverting amplifier is written as

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G = R₂/R₁

G = 1 + R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved

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1.92 N

19.2 N

12 N

0.192 N

The square of 0.4 is:

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Greater than 0.4

Smaller than 0.4

Equal to 0.4

None of them

The time period of a simple pendulum is independent of its:

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Length

Mass

Value of g

Both A and B

Coulomb's force between two point charges depends upon

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Magnitude of charges

Distance between them

Medium in which they are located

All of the above

In an N-type silicon, which of the following statement is true

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Electrons are majority carriers and trivalent atoms are the dopants

Electrons are minority carriers and pentavalent atoms are the dopants

Holes are minority carriers and pentavalent atoms are the dopants

Holes are majority carriers and trivalent atoms are the dopants

With increase of temperature, the viscosity of liquid and gases

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Increases for both

Decreases for both

Increases for liquids and decreases for gases

Decreases for liquids and increases for gases

The fluid is incompressible, if itsdensity is

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zero

constant

very high

very small

The SI unit of magnetic induction is

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Weber

Weber/meter

Henry

Tesla

A line normal to the wave front is called

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A beam of light

A ray of light

Both

None of these

If the instant velocity does not change, the body is moving with a

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Initial velocity

Variable velocity

Uniform velocity

None of these

Relation between range and maximum range is

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R=R_max Sinθ

R=R_max Sinθ/2

R=R_max Sin2θ

R_max = RSin2θ

Davisson and Germer, in their experiment used:

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Nickle crystal

Lead crystal

Graphite crystal

Glass

The torque is taken as negative when it is

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Clockwise

Anticlockwise

Both

None of these

If the velocity-time graph is a straight line, then it is

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parallel to velocity-time

parallel to time axis

inclined to velocity axis

inclined to time-axis

In uniform circular motion the angular acceleration vector is

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Constant in magnitude and direction both

Constant in magnitude only

Constant in direction only

Varies in magnitude and direction both

The typical speed of Moon around the Earth is

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1000 ms^-1

2000 ms^-1

3000 ms^-1

4000 ms^-1

Torque is a turning effect of a

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Body

Momentum

Force

None of these

The centre of gravity of a body of an irregular shape lies

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At its centre

inside the surface

At the intersection of medians

All of these

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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