Question # 1

A direction of torque is

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Along the position vector r

Perpendicular to both r and f

Along the direction of force F

Opposite to the direction of r

In stationary waves the points which always remain at rest are.

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Nodes

Antinodes

Crest

Trough

Michelson's interferometer can be used ot find the

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Velocity of light

Wavelength of light

Velocity of sound

Wavelength of sound

The internal energy of a piece of lead when beaten by hammer will.

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Increase

Decrease

Remains constant

Increases and then decrease

The frequency of 2nd pendulum is

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0.5 Hz

1 Hz

1.5 Hz

2 Hz

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

What would encourage trade between two countries

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Different tax system

Frontier checks

National currencies

reduced tariffs

One complete round trip of a body is called

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Displacement

Time period

Vibration

Frequency

In case of point source the shape of wave front is.

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Plane

spherical

Circular

Eliptical

The SI unit of power is

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Joule

Newton

Watt

Kilowatt

Standard metal according to Michelson's interferometer is equivalent to

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1553163.5 wave meter

3 x 108meter

15503000 meter

None of these

The artificial satellites are held in orbits by

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Gravitational force

Electric force

Magnetic force

All of these

When a vector is multiplied by a (-)ve number its direction

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Remains constant

Reversed

Change by 90°

None of these

Einstein's theory gives us the physical picture of how the

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Body moves

Gravity works

Moment of inertia produced

Weightlessness creates

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

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Remain same

Sixteen times

Double

Four times

Environmental crisis are also known as

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Population crisis

Entropy crisis

War crisis

Mass crisis

The unit of energy is same as that of

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Power

Work

Torque

Density

The final image formed by a simple microscope.

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Virtual and inverted

Real and erected

Virtual and erected

Real and inverted

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