Question # 1

The path described by a projectile is called its

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orbit

trajectory

range

distance

In magnet-coil experiment, emf can be produced by

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Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving

Relative motion of the loop and magnet

Any one of above

All above

The force exerted by the fluid in a hydraulic pump on the piston is 10 cm², the fluid pressure on the piston is, in N/cm²

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20

200

2000

20,000

Selenium is:

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An insulator

A conductor

Both A and B

Excellent conductor

None of these

The shell closer to the nucleus is called:

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N shell

L shell

K shell

M shell

O shell

In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as

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plastic limit

plastic deformation

proportional limit

elastic behaviour

Direction of angular momentum is determined by:

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Right hand rule

Head to tail rule

Left hand rule

None of them

When two protons are brought closer potential energy of both of them:

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Increases

Decreases

Remains same

None of these

Depletion region contains:

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Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

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Double

Remains constant

Half

None of these

Potentiometer is more sensitive than voltmeter, because

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Voltmeter has a very high resistance

Voltmeter has a very low resistance

Potentiometer does not draw any current from a source of unknown potential difference

Potentiometer is sensitive

Newtons third law says, that the action and reactions are

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Equal but in the same direction

Equal but in opposite direction

May be unequal but in the same direction

May be unequal but in opposite direction

What remains constant in the field of central force?

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Potential energy

Kinetic energy

Angular momentum

Linear momentum

Range of a projectile is R.when the angle of projection is 30°.Then the value of the other angle of projection for the same range is:

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45°

60°

50°

40°

Torque will be zero if

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body is at rest

rotating with uniform angular velocity

zero angular acceleration

all of them

Spectrometer can measure quite accurately prism

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Deviation of light by a glass prism

Angle of prism

Refractive index of the material of prism

None of these

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

Electric potential energy per unit charge gives the expression for

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Electric intensity

Electric flux

Electric potenial

Power

The length of a telescope is 36 cm.The focal lengths of its lenses can be

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30 cm,6 cm

-30 cm,-6 cm

30 cm,-6 cm

-30 cm,-6 cm

The center of gravity is also called

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Centre of mass

Centre of body

Centre of force

None of these

A gas is compressed adiabatically till its temperature is double. The ratio of its final to its initial volume is

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1/2

More than 1/2

Less than 1/2

Between 1 and 1/2

The property of bending of light around obstacies is called

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interference

reflection

diffraction

polarization

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