Question # 1

If we increase the length of a simple pendulum four times, its time period will become

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2 times

3 times

4 times

6 times

Rate of diffusion is

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Faster in solids than in liquids and gases

Faster in liquids than in solids and gases

Equal to solids, liquids and gases

Faster in gases than in liquids and solids

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

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done is 25J. The angle which the force makes the direction of motion will be:

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60°

90°

30°

0°

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

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50

100

150

200

250

A P-N juction or semiconductor diode cannot be used as

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A rectifier

Detector

Oscillator

An amplifier

A ball of mass m moving with uniform speed collides elastically with another stationary ball. The incident ball will lose maximum kinetic energy when mass of the stationary ball is

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m

2 m

4 m

Infinity

If the slope of the velocity-time graph increases at constant rate with time, then the body is said to have

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uniform deceleration

uniform negative acceleration

average acceleration

uniform positive acceleration

The body of physics involves

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Structure of space and time

Interaction of electromagnetic radiation with matter

Both of them

Chemical Changes

If force and displacement are in opposite direction, the work done is taken as:

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Positive work

Negative work

Zero work

Infinte work

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

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negative charges

positive charges

protons

electrons

Torque producing anticlockwise rotation is taken as

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negative

positive

zero

both negative and positive

If a gymnast sitting on a rotating table with his arms out stretched suddenly lowers his hands

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The angular velocity decreases

The moment of inertia decreases

The angular velocity remains constant

The angular momentum increases

A car is moving high velocity when it takes a turn.A force acts on it outwardly because of

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Centripetal force

Centrifugal force

Gravitational force

All of these

The electrical forces between the molecules of a liquid are

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Repulsive

Attractive

Both A and B

None

Diameter of the nucleus is of the order of

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10^-10m

10^-12m

10^-15m

10^-18m

The appearance of colours in the shape (or oil) film results from:

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Dispersion

Interference

Reflection

Refraction

Einsteins theory gives us a physical picture of how gravity

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Created

Produced

Works

None of these

If the volume of a gas is to be increased four times then

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Its temperature must be doubled

At constant temperature its pressure must be decreased four times

At constant temperature its pressure must be increased two times

It cannot be increased

Young's modulus for bone is

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10

15

20

25

The lift of Aero plane based on

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Law of gravitation

Bernoulli's theorem

Torricelli's theorem

Law of conservation of momentum

Stress may be

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Tensile

Compressive

Shear

All of these

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