Question # 1

All point of the rigid body rotating about a fixed axis do not have same.

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Angular acceleration

Angular speed

speed

Angular displacement

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

Beats can be heard when difference of frequency is not more than.

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8 Hz

10 Hz

4 Hz

6 Hz

Minimum number of unequal forces whose vector sum can be zero are.

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5

4

3

2

Salter's duck was invented by

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Newton

Einstein

Prof Salter

Maxwell

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

Errors due to incorrect design of a device are called

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Random Error

Systematic Error

Physical Error

None of these

The work done will be maximum when angle between F and d.

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180^o

0^o

90^o

60^o

Teh uncertainty may occur due to

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Limitation of an instrument

Natureal variance of the object

Personal negligence

All of the above

Slope of velocity time graph describes a physical quantity called.

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Displacement

Average velocity

Average acceleration

Momentum

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 one is non renewable source of energy.

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Hydro electric

Bio mass

Tides

Oil

Identity the non conservative force among the following.

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Frictional force

Electrical force

Gravitational force

Elastic restoring force

The SI unit for measuring plane angle is

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Streadian

Radian

Both a and B

None of these

A force of 20 N acts along x axis, tis component is.

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0 N

10 N

20 N

30 N

The word Fluid means

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To rise

To fall

To flow

To oppose

The study of fluid dynamics is

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Easy

Complicated

Impossible

None of these

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

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