Question # 1

When a body is whirled in a horizontal circle by means of string, the centripetal force is supplied by

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Mass of body

Velocity of a body

Tension in the string

Centripetal acceleration

Angular displacement is

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Scalar quantity

Vector quantity

Basic quantity

None of these

If the initial velocity of a projectile becomes doubled, the time of fight will be.

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Same

4 times

Double

3 times

Height of geo stationary orbit of the satellite above the earth is.

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300 km

250 km

400 km

None of these

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

Pascal is the unit of

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Pressure

Force

Tension

Weight

Angular velocity determines, How fast or, How slow a body is

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Accelerating

Vibrating

Rotating

Oscillating

Efficiency of steam locomotive is.

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8%

10%

9%

7%

The state of human blood flow can be found by using.

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Newton's formula of speed of sound

Interference of sound

Phenomena of beats

Doppler's effect of sound

The velocity of a projectile is maximum

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At the highest point

At point of launching and just before striking the ground

At half of the height

After striking the ground

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

The accepted value for speed of light in vacuum

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2.99 x 10⁸m - sec^-1

2.99 x 10⁶m - sec^-1

2.99 x 10⁸km - sec^-1

2.99 x 10⁸m - h^-1

Turning of radio is example of.

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Mechanical resonance

Electrical resonance

Physical resonance

Biological resonance

Critical angle is that incident angle in denser medium for which angle of refraction is.

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0 ^o

45 ^o

90 ^o

120 ^o

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The orbital angular momentum is associated with the motion of a body along

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Straight path

Circular path

Curved path

Along any path

The light energy travels in space as waves was firstly proposed by

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Maxwell

Young

Einsten

Hydrogen

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

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