Question # 1

The number of significant figure in 8.80 x 10⁶ kg is

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1

3

6

5

Parallel vectors of same magnitude will be

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Equal

Opposite

Both a and b

None of these

The time rate of change of momentum equals

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Weight

Applied force

Impulse

Mass

A man of mass 5 kg is falling freely, the fore acting on it will be

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5 N

9.8 N

19.6 N

49 N

The error is constant for ............error

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Random

Systematic

Both a and b

All

If the pressure of a gas is doubled, then speed of sound is.

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Doubled

Become half

Not affected

Increases by four times

The motion and rest are

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Absolute

Relative

Mutual

All of these

The shortest distance between two points is called

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Distance

Amplitude

Displacement

Is a number

When one mirror of a Michelson interferometer is moved a distance of 0.5 mm, 2000 fringes and observed, The wavelength of light used is.

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5000 m

50000 A^o

500 cm

2000 A^o

An immediate source of energy for our body is:

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mango

Glucose

mushroom

meat

Which of the following is the derived quantity.

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Time

Length

Area

Mass

The kinetic energy of molecules of an ideal gas at absolute zero is

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Very low

Very high

Zero

First increases then decreases

Which is not the essential component of a spectrometer.

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Collimator

Telescope

Turntable

Microscope

The temperature of human body on Kelvin scale is

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210K

310K

410K

510K

A ball is thrown up with 20 ms-1 at an angle of 60 ^owith x-axis , the velocity of the ball at the top position is.

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0 ms-1

10 ms-1

20 ms-1

16 ms-1

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

The SI unit of angular displacement is.

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Degree

Revolution

Radian

Rotation

The Detector in Photo phone is made up of.

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Cadmium

Germanium

Selenium

Silicon

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