Question # 1

Surface tension of a liquid may be defined as

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Heat energy per unit area

P.E. per unit area

surface energy per unit area

K.E. per unit area

A physical quantity which produces rotation in a body is called.

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Force

Torque

Momentum

accelerate

Newton's rings are experimentally derived from the phenomenon of.

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Polarization of light

Resolution of light

Interference of light

Diffraction of light

Which pair of the following forces has a resultant force of 2 N.

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1 N and 1 N

1 N and 3 N

1 N and 2 N

2 N and 2 N

The ablate of rays of different colours to converge a single point sifter refraction though a convex lens is called.

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Come

Distortion

Spherical aberration

Chromatic aberration

Which was the transparent front part of the eye that covers the pupil, iris and interior chamber.

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Cornea

Fovea

Sclera

Choroid

What happens when a 250 V, 2500 W water heater is connected to main supply using a plug fitted with a 5 A fuse.

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The fuse in the plug melts

The heartier burns out

The hearter runs at half power

The hearter works normally

Which of the following is an electrical insulator that can be polarized by an applied electric field.

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Conductor

Condenser

Di electric

Capacitor

Which of the following is an example of irreversible process.

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Melting of ice

Work done against friction

Pettier heating and cooling

All isothermal and adiabatic changes

When a fluid in a cylinder expands through a distance 'd' against a piston of area 'A' which is exerting a constant pressure 'P' the work done is equal by.

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PAD

PA/d

Pd/A

Pd/A2

An inflated tyre suddenly bursts As a result of this temperature of the surrounding

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Increases

Descreases

Remains constant

May increase or decrease

Beats occurs because of.

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Reflection

Refraction

Interference

Doppler's effect

A simple pendulum suspended from the celling of a lift has a time period T when the lift falls freely the time period of the pendulum will become

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Zero

T/9.8

9.8 T

Infinity

The permittivity of a medium.

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Is a measure of the density

Is equal to unity for air

Depends on the charge derisory of the medium

Determines the magnitude of an electric field that can be established by the medium

Interference through thin films depends upon

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Thickness of thin film

Nature of material of thin film

angle of incident light

All of the above

Thermodynamics concern its primary with the

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Measurement of quantity of heat

Physical effects of temperature changes

Conversion of heat into other energy forms

Behavior of gases

In a compound microscope magnification will be large if focal length of eyepiece is

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Large

small

Equal to that of the objective

Larger than that of the objective

During the projectile motion, the horizontal component of velocity.

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Changes with time

Becomes zero

Does not change but remains constant

Increases with time

If the dot product of two non zero vectors vanishes the vectors will be.

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any scalar quantity

Any negative number

Its magnitude but not direction

Its magnitude and direction

The sensitivity of the galvanometer can be increased by increasing the

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Number of turns of the coil

Area of the coil

Strength of the magnetic field

All of the above

In a n-type material there is an excess of.

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Free electrons

Holes

Quarks

Measons

Sound of frequencies lower than 20 Hz are called.

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Supersonics

Infra sonics

Ultrasonic

Audible sound waves

House hold circuits are mostly

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Wired in sires

Wired in parallel

Made using wires of gold

Made using wires of silver

When the angel of incidence becomes larger than the critical angle no refraction occurs This is known is.

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Diffraction

Refraction

Total internal reflection

Diffuse reflection

Materials that experience a force from stronger to weaker regions of magnetic field are called.

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Non magnetic

Paramagnetic

Ferromagnetic

Diamagnetic

The force applied on unit area of a body to produce any change in shape volume or length is known as.

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Strain

Stress

Tensile strain

Tensile stress

Which of the following colours of light passes through glass with minimum speed.

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Green

Yellow

Red

Violet

A large ripple tank with a vibrator working at a frequency of 30 Hz produce 25 complete waves in a distance of 50 cm. The velocity of the wave is.

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9.53 cm s-1

60 cm s-1

750 cm s-1

1500 cm s-1

Both xenon and cesium each have

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24 isotopes

28 isotopes

32 isotopes

36 isotopes

The advantage of electron tube over semiconductor is.

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_{its efficiency}

its unlimited type

Its low consumption power

That it takes no warming up time

By placing soft iron inside a coil

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Increases the magnetic flux

Decreases the magnetic flux

Creates no change in magnetic flux

Decreases the diameter of the core

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