Question # 1

When X_c = X_l, this condition is called.

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Equality

Balanced

Resonance

Equlibrium

The unit of energy are the same as that of

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Force

Power

Work

Efficiency

A leser beam may be used to measure very large distance because it is.

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Unidirectional

Cohernet

Monochromatic

Not absorbed

Why should the metal casing of an electrical fire be earthen.

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To complete an electrical circuit.

To prevent the fire from overheating

To reduce the risk of electric shocks

To stope the casing from getting too not to touch

If the earth stopped rotating the weight of objects at either pole would.

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Be grater

Be less

Vary with altitude

Be the same before

The point midway between the lens surface on its participial axis

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Optical centre

Principal focus

Focal plane

Focal length

A device which converts electrical energy into mechanical energy is called.

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A.C generator

D.C. generator

Motor

Commutator

Woolen clothing a effective in keeping us warm because.

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An trapped int he wool acts as an insulator

Heat loss by convection and radiation is prevented

Wool is bad traciator and good absorber of heat

Wool can retain high temperatures

Electromagnetic wave theory was proposed by

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Maxwell

Hertz

Fizeace

Huygen

During solid ficain the temperature.

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Remains constant at the freezing point

Increases at the freezing point

Decreases at the freezing point

Decreases at the melting point

The resistance of a wire does not depend upon.

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Area of cross section of the wire

Length of the wire

Temperature of the wire

Current passing though the wire

Which vector gives the displacement from one point to another in space.

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Position vector

Unit vector

Null vector

Distance vector

Which of the following is required for maintaining sustained chain reaction.

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Neutrons

Protons

Electrons

Photons

How many types of quarks were suggested i 1964 quark theory.

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Two

Three

Four

Five

Lagging of magnetic flux density behind the magnetizing fled is known as.

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susceptibity

Diamagnetism

Hysteresis

Retentivity

Which of the following particles leave no trail in a cloud chamber.

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Electrons

Protons

Alpha particles

Neutrons

Which one of the following has the largest wavelength.

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x rays

Infrared rays

Visible light

Radio waves

A liquid surface tend to contract this phenomenon is due to

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Viscosity

Diffusion

Density

surface tension

Bracket and plunk series of spectral lines lye in the

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Visible region

Ultraviolet region

Far infrared region

Infrared region

The dimensions of force are.

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[MLT-2]

[MLT-1]

[M,-1T-2]

[M-2T-2]

When amplitude of a wave becomes double its energy becomes.

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Xero

Double

4 times

6 times

The internal energy of monoatomic gas is.

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3/2 RT

Independent of temperature

In the form of K.E.

Partially kinetic and partially potential

Two bullets a and b have masses 1 kg and 12 kg respectively.

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K.E. of B will be twice that of A

K.E. of A will be twice that of B

Both have same K.E.

K.E. of A will be half that of B

Which of the following propagates at the same speed as velocity of light.

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Heat waves

Sound waves

Shock waves

Beta particles

What is true is real images formed by a converging lens.

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they are inverted

They are on the same side of the lens as the object

They can never be shown on a screen

They cannot be seen

Potential of earth's surface is.

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Negative

Positive

Zero

Infinite

The emf induced by the motion of a conductor across a magnetic field is called.

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Absolute potential

Motional emf

Induced emf

Terminal potnetial

In simple harmonic motion we have the conservation of.

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K.E.

P.E

Total energy

Electrical energy

The magnitude of the resultant of two equal forces is equal to either to the force What is the angle between the two forces

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0 ^o

120 ^o

60 ^o

180 ^o

Light of passing through a polaroid is

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Plane polarized

Unpolarized

Circularly polarized

Elliptically polarized

In scientific notation 0.0003 can be written as.

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3 x 10⁴

3 x 10^-4

3.0 x 10³

3.0 x 10^-3

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