Question # 1

A swing has

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one natural frequency

two natural frequencies

three natural frequencies

four natural frequencies

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

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Becomes Half

Becomes double

Is not affected

Becomes one fourth

None of these

Bernoulli's equation is applicable for

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turbulent flow

streamline flow

both (a) and (b)

all kinds of flows

The product of the pressure and volume of an ideal gas is

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A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

If d is the displacement of the body in time t, then its average velocity will be

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V_av= d x t

V_{av = t/d}

V_{av = d/t}

Physical quantities are often divided into ______ categories

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3

2

9

5

When a mass 'm' is pulled slowly, the spring stretches by an amount x₀,then the average force would be

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F= Kx₀

F=1/2Kx₀

F=2Kx₀

F=4Kx₀

If the length of a simple pendulum is 0.25 m its time period would be

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1.0 s

2.0 s

3.0 s

4.0 s

The curie temperature of iron is about

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250°C

500°C

750°C

1000°C

If the length of second pendulum becomes four times then its time period will become

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Four time

Two times

Six times

Eight times

If the value of C in a series RLC circuit is increased, the resonant frequency

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Is not affected

Increase

Remains the same

Decreases

In slow Compression of a gas in a cylinder is reversible as the compression can be changed to expansion by

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Rapid decreasing the pressure

Slowly decreasing the pressure

Extremely decreasing the pressure

None of these

Polythene,polystyrene and nylon are example of

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Polymeric solids

Crystalline solids

Glassy solids

Which of the following statements correctly describes the properties of two forces acting as a couple

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Equal, parallel and collinear

Unequal, anti-parallel and no-collinear

Unequal, anti-parallel and collinear

Equal, anti-parallel and non-collinear

Ferromagnetic substances lose their magnetism when heated above a certain temperature, known as

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critical temperature

curie temperature

high temperature

fixed temperature

The reason why weight exists is that

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the earth exerts gravitational force on objects

both the earth and any object on it has mass

gravity exists

All of them

The transmitter in optical fiber system contains a device called

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LED

Diode

Transistor

None of these

Change in entropy is positive when heat is

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Removed

Added

Remains as is it

None of these

Propagation of light in an optical fibre requires that the light should

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be partially confined within the fibre

be totally confined within the fibre

not be confined within the table

none of them

In a crystal the density of atoms or molecules does not vary from direction to direction. This is known as:

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Cleavage

Anisotropy

Homogeneity

None of these

An inertial frame of reference is that frame of reference in which

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a = 0

a > 0

a < 0

all of them

De-Broglie received the Nobel prize on his work on:

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Wave nature of particle

Corpuscular nature of wave

Dual nature of particle

All of them

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