Question # 1

Hot igneous rocks, usually in molten or partly molten state are found in the depth of

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5 km

10 km

15 km

20 km

Which one of the followign Muslim mathmatision determined the earths circumference.

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Al Beruni

Ibn Sina

Al Khawrizmi

None of these

The resultant of two forces 3 N and 4 N acting at right angle to each other is

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7 N

5 N

4 N

1 N

On loading the prong of a tuning fork with wax, the frequency of sound.

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Increases

Decreases

Remains same

First increases then decrease

Which of the following is evidence of wave nature of light

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Interference

Diffraction

Polarization

All of these

the work done in isochoric process is.

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Constant

Variable

Zero

Depend upon condition

Not change in entropy of a system after one complete Carnot cycle is.

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Positive

Negative

Zero

None of these

The speed of sound in air would become double than ots speed at 10^oC at a temperature of.

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313 ^oC

586 ^oC

859^oC

899 ^oC

The product of cross sectional area of a pipe and speed of fluid along the pipe is

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Zero

Maximum

Constant

Variable

In thermodynamics system internal energy decrease by 100 J and 100 J of work done on the system then heat lost will be.

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Zero

100 J

200 J

-200 J

Speed of sound in copper is

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38000 ms-1

3600 ms-1

3500 ms-1

3400 ms-1

If the tension a stretched string is made four times then the velocity of wave.

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Remains same

Is halved

Becomes twice

Becomes 4 times

Angular frequency is the characteristic of

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Linear motion

Vibratory motion

Circular motion

All of these

The types of optical fibres are

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Three

Four

Five

Six

A man of 5000 kg moves with an acceralation of 1 ms-2 force acting on it is.

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5 N

500 N

50 N

5000 N

the length of simple pendulum of time period 1 second is

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2 m

1 m

0.5

0.25 m

If velocity 'v' of an object is double, then K.E. because.

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Remain same

Sixteen times

Double

Four times

Rate of change of velocity is called

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Speed

Acceleration

Displacement

Torque

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