Question # 1

A body has P.E. = mgh, when it is at height 'h' from the ground. At the point at the distance 'x' below from the top its P.E. with

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mgh

mgx

mg(x-h)

None of these

the velocity of sound at 0 ^oC is 332 ms-1, the velocity of sound at 10 ^oC will be

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337.1 ms-1

338.1 ,ms-1

342.1 ms-1

328.1 ms-1

In an object is placed in between focus point and Opticla center of a convex lens, the image formed by lens is.

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Real inverted

Virtual diminshed

Virtual inverted

Virtual erected

An ideal reversible heat engine has

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100% efficiency

Highest efficiency

80%

90%

A set of frequencies which are multiples of the fundamental frequency are called.

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Doppler effect

Nodal frequencies

Beat frequencies

Hamonics

If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.

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Constant

Zero

Increase

Decrease

A 2 meter of high tank is full of water. If a hole appears at its middle, then the speed of efflux is.

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4.4 ms-1

10 ms-1

6.2 ms-1

20 ms-1

Radar system is an application of.

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Chemical effect

Electric effect

Magnetic effect

Doppler's effect

1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

Watt -m2 is the unit of

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Energy

Intensity

Power

Work

If 332 waves pass through a medium in 1 second with speed of 332 ms-1 then wavelength will be

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7 m

332 m

664 m

1 m

The moment of inertia is analogue to

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Mass

Weight

Torque

Force

The relation between linear and angular velocity is

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The motion of gas molecules is

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In the same direction

Random

Walls of container

Opposite to each other

The time period of an oscillating mass spring system is 10 second. If mass attached to spring id doubled then time period becomes.

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10 sec

20 sec

5 sec

None of these

Value of triple point of water is given as.

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Zero K

100 K

273.16 K

373.16 K

The unit of co efficient of viscosity in S.I system

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Kg -1 ms-1

Kg m-1 s-1

kg -1 m-1

Kg ms-1

The time rate of change of momentum equals

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Weight

Applied force

Impulse

Mass

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