Question # 1

The increase in thermal pollution of environment means.

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Increase in the entropy

Decrease in the entropy

Entropy remains constant

Entropy becomes zero

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

Fringe spacing is inversely proportional to.

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Wave length

Slit separation

Distance between the slit and screen

Frequency of light

A₁b₁= A₂b₂represents

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Stock's law

Newton's law

Equation of continuity

Brenoulli's equation

The mathematical expression for the restoring force is.

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F = kx

F = ma

F = dp/dt

F = -kx

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The value of solar constant.

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1.4 kW m-2

1.0 kW m-2

1.6 kW m-2

2 kw m-2

Second pendulum has a time period

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1 sec

3 sec

2 sec

4 sec

One complete round trip of a body is called

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Displacement

Time period

Vibration

Frequency

The speed of sound in ari at 0 ^oC is 332 ms-1, Then the speed at 40 ^oC will be

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372 ms-1

356 ms-1

346 ms-1

332 ms-1

If a mass of a body is doubled, then acceleration becomes.

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Double

Half

One fourth

Constant

A 2 meter of high tank is full of water. If a hole appears at its middle, then the speed of efflux is.

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4.4 ms-1

10 ms-1

6.2 ms-1

20 ms-1

Oscillation of shock absorber of a car is practical example of.

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simple harmonic motion

Forced oscillation

Damped oscillation

Undamped oscillation

Entropy remains constant.

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Isothermal process

Adiabatic process

Isochoric process

Isobaric process

2 radian = ____

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2 m

4 m

57.3 m

114.6 m

The density of blood is nearly equal to.

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Air

Milk

Honey

Water

Two waves of same frequency and moving in the same direction produces.

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Interference

Diffraction

Beats

Stationary waves

A stretched string 2 m long and it has 2 hopes of stationary waves hen the wavelength is

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4 m

2 m

3 m

1 m

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