Question # 1

A Carnot engine has an efficiency of 50% when its sink temperature is at 27 ^oC. The temperature of source.

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273^oC

300 ^oC

327 ^oC

373 ^oC

Longitudinal waves do not exhibit

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Reflection

Refraction

Polarization

Diffraction

Which is nooptically active

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Sugar

Tartaric acid

Water

Sodium chloride

Which is unimportant in describing the satellites orbit.

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Distance of satellite from earth's center

Gravitational constant G

Mass of satellite

Mass of earth

The velocity of a free falling body just before Hattin the ground is 9.8 ms-1, the height through which is fall be

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98 m

19.6 m

4.9 m

9.8 m

The rate of change of angular velocity is called

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Angular velocity

Angular acceleration

Angular displacement

Angular speed

Multimode step index fibre is useful for

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Long distances

Short distances

Better quality

Low price

The SI unit of work is

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Newton

Joule

Mol

Calorie

The diver spins faster when moment of inertia becomes.

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smaller

Greater

Constant

Zero

10 waves pass through a point in 2 seconds with speed 10 ms-1 the frequency of wave will be

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1 Hz

2 Hz

5 Hz

10 Hz

When sound waves enter in different medium, the quantity that remains unchanged is.

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Intensity

Speed

Frequency

Wave length

Maximum number of components of a vector may be

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Infinite

One

two

three

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

The frequency of waves produced in microwave oven is

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1435 Hz

2450 MHz

1860 MHz

2850 Hz

One mile is equal to

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1.625 km

1.609 km

1.325 km

1.850 km

The law of conservation of energy gives us

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Equation of continuity

Stock's law

Bernoulli's equation

Viscosity

Time taken by light to reach from sun to earth is.

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8 min 20 sec

7 min 20 sec

9 min 20 sec

None of these

Energy dissipated usually appears as

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P.E.

Heat Energy

Chemical energy

Nuclear Energy

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