Question # 1

A ball is thrown upwards with a velocity of 100 m/s. It will reach the ground after

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10 s

20 s

5 s

40 s

Glass is an example of

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crystalline solid

amorphous solid

polymeric solid

none of them

The irregular and unsteady flow of the fluid is called

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turbulent flow

steady flow

either of them

both of them

A full-scale deflection is obtained in a galvanometer with a current of few

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ampere

volts

milliampere

ohm

The word amorphous means:

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Without any structure

With definite structure

Regular arrangement of molecules

Both (B) and (C)

None of these

Tick the correct answer:

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Torque is a vector quantity

Torque is the turning effect of a force

Torque is called moment of a force

All of above

How many isotopes of helium are present?

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1

2

3

4

In rotational motion, analogue of force F us called:

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Couple

Torque

Mass

Moment of intertia

The value of LDR depends upon intensity of:

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Sound falling on it

Current passing through it

Magnetic field surrounding it

Light falling on it

Non of these

When a platinum wire is heated, it appears yellow at

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1600°C

900°C

1100°C

1300°C

A physical system under going forced vibrations is known as

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Simple harmonic oscillator

Compound harmonic oscillator

Physical harmonic oscillator

driven harmonic oscillator

Rocket engines lift a rocket from the earth surface because hot gas with high velocity

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Push against the earth

Push against the air

React against the rocket and push it up

Heat up the air which lifts the rocket.

Ball pen functions on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tension

For the monochromatic beam of X-rays, the crystal planes in a lattice act like a

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perfect absorbers

boundary

mirror

none of them

When a ray of light goes from a denser medium into a rare medium

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The wavelength of light is decreased

The frequency of light increased

The speed of light is increased

The light undergoes a phase change of π

The bands below the valence band are

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completely filled and play active part in conduction process

completely filled and plays no part in conduction process

not completely filled and play active part in conduction process

not completely filled and play no part in conduction process

When an image is placed at the focal length of the eye piece, the final image formed at

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2 F

4 F

6 F

Infinity

A ray of light always points

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Anti parallel to wave front

Perpendicular to wave front

Parallel to wave lets

None

The K.E.of a light and a heavy object is same.Which object has maximum momentum?

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Light object

Heavy object

Both have the same momentum

Data is not sufficient

The torque is taken as positive when it is

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Clockwise

Anticlockwise

Both

None of these

An INTEASAT VI satellite operates at microwave frequencies of

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4, 6, 13, 16 GHZ

4, 5, 11, 13 GHz

4, 6, 11, 18 GHz

4, 6, 11 and 14 Ghz

Identify the incorrect statement

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The distance between the objective and eye-piece is 16.02 cm

The angular magnification of the planet is 800

The image of the planet is inverted

The objective is larger than the eye-piece

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