Question # 1

According to first law of thermodynamics the quantity which is conserved.

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Force

Momentum

Energy

Power

The SI unit of intensity of light is

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Joule

Mole

Candila

Kilomole

The fringe spacing in a double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slit separation

Distance between the slits and the screen

Time rate of change of angular displacement is called

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Linear velocity

Angular velocity

Rotational velocity

Vibrational velocity

Average acceleration is a

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Scalar quantity

Vector quantity

(-) ve quantity

None of these

In the absence of external force, the change in momentum is.

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Zero

Constant

Decreasing

Increasing

The velocity of a projectile is maximum

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At the highest point

At point of launching and just before striking the ground

At half of the height

After striking the ground

The ideal gas law is.

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PV =NVk

P = NkT

PV =nRT

P=nRT

Centripetal force perform

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Maximum work

Minimum work

Negative work

No work

The mechanism of transports energy of all the waves is

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Different

Same

Complicated

Easy

Which of the following is the derived quantity.

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Time

Length

Area

Mass

The number of spark plug needed in diesel engine is

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0

2

3

4

Increase in the velocity of sound in air for 1 ^oC rise in temperature is.

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61 ms-1

0.61 ms-1

161 ms-1

261 ms-1

For 0.0036 no. of significnat digits

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1

3

2

4

The entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

At constant temperature and pressure, if volume of given mass of a gas is doubled then density is.

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Doubled

1/4 original

1/2 of original

Unchanged

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

In sonar we use

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Sound waves

Ultrasound waves

Microwaves

Radio waves

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