Question # 1

The radius R of the earth is:

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6 x 10¹⁸m

6.4 x 10⁶m

6.4 x 10⁸m

6.4 x 10¹²m

In which of the following state molecules do not leave their position?

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Solid

Liquid

Gas

Plasma

In circular motion, the motion of every particle of body is.

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Direction

Opposite

Same

None of these

Rolling friction is___________ then sliding friction :

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Greter

Less

Some

Half

If K = 150 N/m and elasticity is 0.20 m than:

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F = 30N

F= =31N

F = 32N

F = 29N

The kinetic energy of a body of mass 2 kg is 25J, its speed is

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5 ms-1

12.5 ms-1

25 ms-1

50 ms-1

Which gas is replaced by Ammonia in refrigerators?

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Nitrogen

Carbon di oxide

Methane

Freon gas

Fossil fuels are usually:

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Carbon di oxide

Hydrogen

Hydrocarbons

Carbon monoxide

The large unit of work is:

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Kilowatt

Kilo joul

Mega joul

Both B and C

What of the following is a god radiator of heat?

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a Shinning silvered surface

a dull black surface

a white black surface

a shinning colored surface

Anything kept in thermos :

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In temperature remain constant

Its temperature decrease

Its temperature increase

None of these

In OR operation inputs are connected as:

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Series

Parallel

Both series or parallel

None of these

The data stored in C.D. is.

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680 MB

650 MB

700 MB

750 MB

If the mass of the bob of a pendulum is increased by a factor of 3. The period of the pendulum's motion will:

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Be increased by a factor 2

Remain the same

Be decreased by a factor of 2

Be decresaed by a facro of 4

Which of the following is a method of energy transfer:

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Conduction

Radiation

Wave motion

All of these

The number of lines of force in a magnetic field depends upon.

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Shape of coil

Sixe of coil

Magnet

Strength of field

What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A?

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4.8 W

14.5 W

30 W

60 W

In CD presence of pits is indicated by:

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0

2

3

1

The unit of intensity of sound:

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Wm^-1

Wm^-2

Wm

Wm²

The speed of sound in air at 21 °C is:

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336ms^-1

343ms^-1

430ms^-1

470ms^-1

In series combination of capacitors, each capacitor will have same:

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Voltage

Charge

Capacitance

Charge and voltage

Which of the following is an example of simple harmonic motion:

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Motion of a simple pendulum

The motion of ceiling fan

The spinning of the earth on its axis

A bouncing ball on a floor

The work done is bringing a unit positive charge from infinity to that point in an electric field is called.

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Potential

Potential difference

Absolute potential

All of these

Direct current can not flow through.

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Inductor

Resistor

Transistor

Capacitor

The capacitance of a capacitor depends upon.

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Thickness of plates

Charges on the plates

Voltage applied

Geometry of the capacitor

The application of mutual induction is a.

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D.C. motor

Radio

Television

Transformer

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

For Holography we use

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X ray

Laser

gama rays

Beta rays

The most abundant isotope of neon is:

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Neon 21

Neon 20

Neon 22

None of above

Resistance of choke is

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zero

Large

Very small

Infinite

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Lenz's law

Faraday's law

Ampere's law

None of these

A particles equal or greater in mass than of protons are called.

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Baryons

Leptons

Mesons

Quarks

Which of the following is one of the spectral series of atomic hydrogen?

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Brockett series

Balmer series

P fund series

All of above

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