Question # 1

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

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Remains constant

Reversed

Change by 90°

None of these

Diffraction is a special type of

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Reflection

Polarization

Interference

Refraction

When a body moves in circular motion, the angle between linear and angular velocity is.

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180^o

90^o

60^o

75.3^o

No spark plug is needed in the

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Petrol engine

Diesel engine

Gas engine

Water engine

Which is not the essential component of a spectrometer.

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Collimator

Telescope

Turntable

Microscope

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

One complete round trip of a vibrating body is called.

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Frequency

Time period

Vibration

Amplitude

In an object is placed in between focus point and Opticla center of a convex lens, the image formed by lens is.

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Real inverted

Virtual diminshed

Virtual inverted

Virtual erected

The wavelength of fundamental note in one end closed pipe in term of length 'l' of pipe is.

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4 l

2l

l

1/4 l

Radar system is an application of.

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Chemical effect

Electric effect

Magnetic effect

Doppler's effect

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

A device based upon the thermodynamics property of matter is called.

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Calorimeter

Heat engine

thermometer

Voltmeter

3 Joules of work id done is 3 seconds, then power

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6 Watt

1 Watt

3 Watt

2 Watt

the length of simple pendulum of time period 1 second is

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2 m

1 m

0.5

0.25 m

Who did give the correct formula for the speed of sound in air?

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Boyle

Laplace

Newton

Einstein

The speed of stars and galaxies can be calculated by

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Compton effect

Stefan's law

Doppler's effect

Pascal's law

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

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