Question # 1

the shortest distance between two points is called.

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Speed

Acceleration

Distance

Displacement

The efficiency of diesel engine is about

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25 % to 30%

35% to 40%

40% to 50%

50% to 60%

In order to produce beats, the two sound waves should have.

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The same amplitude

Slightly different amplitude

The same frequency

slightly different frequencies.

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

The SI unit of work is

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Newton

Joule

Mol

Calorie

Original source of energy for biomass is

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Earth

Star

Moon

Sun

The optical fibre is covered for protection by

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Glass jacket

Plastic jacket

Steel jacket

Diamond jacket

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

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Boyle

Laplace

Newton

Einstein

The sum of two or more vectors will be a single vector called

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Component vector

Position vector

-ve vector

Resultant vector

The artificial satellites are held in orbits by

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Gravitational force

Electric force

Magnetic force

All of these

The magnification of a convex lens of focal length 5 cm is equal to.

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5

6

10

23

When average velocity becomes equal to instantaneous than body is called moving with.

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Instantaneous acceleration

Constant acceleration

Constant velocity

Variable velocity

Horizontal range is maximum when the angle of projectile is.

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0 o

30 o

45 o

60 o

The distance between the consecutive nodes is

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The profile of periodic waves generated by a source executing S.H.M is represented by a.

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Circle

Sine curve

Tangent curve

Cosine curve

A body covers a distance of 10 m in 1 sec with a constant velocity of 10 ms-1 , Acceleration produced by the body is.

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0 ms-1

2 ms-2

5 ms-2

10 ms-2

The centre of Newton's rings will be

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Dark

Bright

Coloured

Not visible

The dimension of pgh has same as that of

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Work

Energy

Pressure

Mass

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