Question # 1

A paratooper moves downward with

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Zero acceleration

Constant acceleration

Positive acceleration

Negative acceleration

Carnot cycle consists of.

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Two steps

Three steps

Four steps

Five steps

If a body of mass 5 kg is raised vertically through a distance of 1 m, then work done is.

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49 J

4.9 J

490 J

0.49 J

The unit of work in base unit is

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Kg m-1 sec-2

Kgm sec-2

Kgm2 sec-1

Kgm-1 sec-1

If the radius of droplet becomes half, then its terminal velocity will become.

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Double

Half

One fourth

Remains same

Speed of sound in copper is

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38000 ms-1

3600 ms-1

3500 ms-1

3400 ms-1

Average acceleration is a

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Scalar quantity

Vector quantity

(-) ve quantity

None of these

The branch of physics which deals with the study of production, propagation and properties fo sound waes is called.

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Heat and thermodynamcis

Optics

Acoustics

Mechanics

Which of the following is a set of supplementary units

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Radian and kilogram

Radian and Steradian

Steradian and time

Mole and radian

In stationary waves, the velocity of particle at the node is.

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Maximum

Infinite

Zero

Varible

Kg ms-1 can also be written as

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Nm

Ns

Ns-1

Js

The ability of reveal the minor details of an object under examination is called.

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Resolving power

Magnification

Scattering

Reflection

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.

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Constant

Zero

Increase

Decrease

The Newton's formula for the speed of sound in air is

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The behaviour of gases is discussed by

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Knowing their nature

Knowing their temperature

Kinetic theory

Maxwell's theory

The branch of physics which deals with the properties of gravitational field, electromagnetic field and nuclear field is called.

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Aerodynamics

Field theory

Acorestics

Hydrodynamics

The unit of rotational K.E. is

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rAD/SEC

Js

J

Kgm2

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