Question # 1

Acceleration of a body is negative if the velocity of the body is

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constant

increasing

decreasing

none of them

The information from far side of the universe are gathered by:

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Radio telescope

Microscope

Telescope

Spectro scope

Escape velocity from surface of Moon as compared to that from Earth surface is:

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Greater

Smaller

Equal

None of thes

The R₁= infinity and R₂= 0, then the gain of non-inverting amplifier is

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zero

infinity

one

any one of these

The pressure exerted by the gas is

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directly proportional to the P.E

inversely proportional to the P.E

inversely proportional to the K.E

directly proportional to the K.E

If an amount of heat enters the system it could

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decrease the internal energy

not change the internal energy

increase the internal energy

none of them

Gamma rays consist of steam of

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electron

proton

photons

all of these

The concept of direction is purely:

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Absolute

Relative

Relative to stars always

Relative to the sun always

None of these

In case of metallic conductors, the change carries are:

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Protons

Electrons

Antiprotons

Positrons

Both (A) and (B)

Two forces each of the magnitude F act perpendicular to each other. The angle made by the resultant force with the horizontal will be:

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30°

45°

60°

90°

Referring to above figure, current in coil P falls from its maximum value to zero

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At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

When switch is kept closed

None of these

The number 1678.9 should be written in scientific notation as

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16.789 × 10³

1.6789 × 10³

1678.9 × 10³

None of these

If an electron vertically downwards, then the horizontal component of the earth’s magnetic field will deflect it to wards

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West

East

North

The relation for the adiabatic change is

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PV = Constant

PV²= Constant

PV^r= Constant

PV^-r= Constant

For a point source of light the wave front produced are

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Circular

Spherical

Cylinrical

None

Linear momentum is a vector quantity and has direction of

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Its displacement

Velocity

Acceleration

None of these

Five equal forces of 10N each are applied at one point and all are lying in one plane.If the angles between them are equal,the resultant force will be:

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Zero

10 N

20 N

10 √2 N

A stationary wave is established in a string which vibrates in four segments at afrequency of 120 Hz. Its fundamental frequency is:

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15Hz

60Hz

30Hz

430Hz

In semiconductors, at 0 K, the electrons in conduction band is

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Partially filled

No

Yes

None of these

To observe interference of light the condition which must be met with is that the sources must be:

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Monochromatic

Phase coherent

Both of above

None of above

Two bodies A and B each of mass 2 kg moving towards right collide with each other elastically,after collision

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A stops and velocity of B increases

Velocity of both decreases

Both moves with the same velocity

Both interchange their velocities

An automobile moves with constant speed along a circle of radius 40 m. It takes 2 μ second to complete one circle,The average speed for one complete circle is

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20 ms^-1

40 ms^-1

60 ms^-1

0 ms^-1

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