Question # 1

The bob of a simple pendulum is suspended by

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string

heavy inextensible string

light extensible string

light inextensible string

First law of thermodynamic is special case of

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Law of conservation of energy

Charle's law

Law of conservation of mass

Boyle's law

One KWh is equal to:

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3.6 x 10²J

3.6 KJ

3,6 x 10¹KJ

3,6 MJ

The path described by a projectile is called its

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orbit

trajectory

range

distance

In radioactive decay, the new element which is formed due to the disintegration of original element is called

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element

daughter element

parent element

none of these

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

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Coulomb's law

Gauss's law

Biot-Sarwat law

Ampere's law

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

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Newton

Joule

Joule-Sec

Joule-s^-1

Watt

Examples of moderators used in a fission reactor is/are:

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Water

Heavy water

Carbon

Hydrocarbon

All of these

Wien's constant is measured in:

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Metre per kelviin

Metre kelvin

Kelvin per meter

Joules

Dynes

The instantaneous velocity of a body moving along a circle is directed

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along the radius

along the tangent

away from the circle

none of them

The terminal velocity of water droplet of radius 1 x 10^-4m and desity 1000 kg m^-3descending through air of viscosity 19 x 10^-6kg. m^-1s^-1is

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2.5 ms^-1

3.2 ms^-1

4.3 ms^-1

1.1 ms^-1

Whenever a body moves from one position to another, the change in its position is called

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Motion

Displacement

Distance

None of these

Diffraction is concerned with the superposition of

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very large number of secondary wavelets

a few secondary wavelets

two secondary wavelets

no secondary

Reverse process of vector addition is called

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Negative of a vector

Subtraction of vector

Resolution of a vector

Multiplication of a vector

A progressive sound wave is a means of transferring energy. A progressive sound waveof constant frequency is generated in air. The intensity of energy transfer is directlyproportional to another of the wave parameters. Which of the following is correct?

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Intensity 𝖺 (𝑎𝑚𝑝𝑙𝑖𝑡𝑢𝑑𝑒)²

Intensity 𝖺 (𝑝𝑒𝑟𝑖𝑜𝑑𝑖𝑐 𝑡𝑖𝑚𝑒)²

Intensity 𝖺 (𝑠𝑝𝑒𝑒𝑑)²

Intensity 𝖺 (𝑤𝑎𝑣𝑒𝑙𝑒𝑛𝑔𝑡ℎ)²

In the Young's double slit experiment the separation between the slits is halved and the distance between the slits and the screen is doubled the fringe width is

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Halved

Unchanged

Doubled

Quadrupled

Breaking load for units area of cross-section of a wire is called:

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Tensile strength

Ductibility

Yield point

Breaking stress

The bending of light when it passes from one medium to another is known as

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Refraction

Interference

Polarization

Diffraction

The gravitational acceleration decreases inversely as the distance from the centre of the Earth is

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Square

One time

Three times

None of these

In the hysteresis loop, when the current is reduced to zero, the material

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does not retain magnetism

retains not retain magnetism

retains strong magnetism

none of them

S.I. unit of angular velocity of

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Radian per second

Revolution per minute

Degree per second

None of these

Longitudinal waves do not exhibit

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Refraction

Reflection

Diffraction

Polarization

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