Question # 1

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

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1890

1895

1900

1905

The loudness and pitch of a sound note depends on

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Intensity and velocity

Frequency and velocity

Intensity and frequency

Frequency and number of harmonic

Second's pendulum is the pendulum whose time period is:

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1 second

2 second

3 second

None of these

The most common source of alternating voltage is:

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Motor

Transformer

AC genrator

Both (A) and (C)

Both (A) and (B)

The wave form of SHM is

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Pulsed wave

Square wave

Triangular waved

Sine wave

Which one is related to angular motion:

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Moment of a force

Moment of inertia

Moment of momentum

None of these

Radioactivity was discovered by:

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Becquerel

Marie curie

Pierre curie

All of them

None of these

Unit vector is used to specify:

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Magnitude of a vector

Dimensions of a vector

Direction of a vector

Position of a vector

Which one is conservative force

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Electric force

Frictional force

Normal force

Air resistance

The distance covered by the wave in one second is:

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Wave number

Wave length

Frequency

Wave speed

The ohm's is defined as

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1 ampere / 1 volts

1 coulomb / 1 volt

1 volt / 1 ampere

1 volt / 1 coulomb

As cross-sectional area of the pipe decreases the speed of fluids must increase according to

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Bernoulli's equation

Venture's reaction

Equation of continuity

Torricelli's theorem

The expression for the terminal velocity V_t when mass of the droplet is considered is

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V^t = 2grρ/9η

Vt = 4grρ/9η

V_t = 4gr²ρ/9η

V_t = 4gr³ρ/9η

The energy needed to amplify and transmit the signals is provided by the satellite by

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Batteries

Generator

Solar cell panels

None of these

If a source of light is moving away from stationary observer then frequency of light wave appears to change because of

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Doppler's effect

Interference

Diffraction

None of the above

The transition of from solid to liquid is actually from:

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Order to disorder

Disorder to order

Order to order

Disorder to disorder

For a given angle of projection if the time of flight of a projectile is doubled the horizontal range will increases to:

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Four times

Thrice

Once

Twice

Which of the following is true?

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Neither momentum nor kinetic energy is conserved in inelastic collisions

Momentum is conserved in all collisions only in inelastic collisions

Momentum is conserved in all collisions but not kinetic energy

Both momentum and kinetic energy are conserved in all collisions

Which Phenomenon proves that nature of light is transverse

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Interference

Diffraction

Scattering

None

Energy required to accelerate a car from 10 ms^-1to 20 ms^-1compared with that required to accelerate from 0 to 10 ms^-1is

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Twice

Three times

Four times

Same

The main reason for the high speed of bullet train is

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Magnetic effect

Reduced friction

Design of train

None of these

If the slits in YDS experiment are made closer, fringe spacing will

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Increase

Decrease

Remain same

None of these

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