Question # 1

Which of the following is a transport optical element with flat polished surfaces that refract light.

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Monocole

Axicon

Prism

Lens

In case of a convex lens when object is placed at 2F image is formed.

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At

2F

away from 2F

Between F at and 2 F

Transformer make possible the

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transmission of A.C. power

conversion of AC and D.C

Cyclotron

Particle accelerator

For which position, will the maximum blood pressure in the body have the smallest value.

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Standing up right

Sitting relaed

Lying horizontally

Standing on one's head

On which property of lens, longitudinal chromatic aberration depend upon

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Resolving power

Dispersive power

Magnifying power

Radius of curvature

To produce beats it is necessary to use two waves.

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Travelling in opposite direction

Of slightly different frequencies

Of equal wavelengths

Of equal amplitudes

The point of which an applied force produces a linear acceleration but no rotation is called.

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Centre of the body

Centre of the mass

Centre of gravity

Weight of the body

Which of the following properties is not exhibited by X-rays.

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Interference

Diffraction

Polarization

Deflection of electric field

What is the heat required in Kilo joules when the temperature of 100 g of copper is raised thgough 20 K/. Specific heat capacity of copper is 0.4 x 10-3 kg -1 k-1

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0.4 kj

0.8 kj

400 kj

800 kj

In heavy elements of the periodic table the number of neutrons than protons are.

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Lesser

Greater

Equal

Undetermined

A solid object is

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Not elastic below the elastic limit

Not elastic above the elastic lime

Elastic below the elastic limit

Not elastic at all

X-rays eject electrons from matter by

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Pair production

Pair annihilation

Compton effect

Photoelectric effect

Which statement for geostationary orbit is false.

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A geostationary orbit must be directly above the equator

All satellites in a geostationary orbit must have the same mass

The period of a geostationary orbit must be 24 hours

There is only one possible radius for geostationary orbit

The charge on a helium nucleus is equal to the charge of.

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Two electrons

Two protons

Two neutrons

One proton

Which one of the following is a neutron absorber

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Pb

Cd

Cu

Ag

In any collision between two bodies there need nor the conservation of

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Linear momentum

Angular momentum

Total energy

Kinetic energy

The working principal of a photograph enlarger is basically the same as that of a.

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Camera

Side projection

Microsopce

Telecopse

When a ray of light is incident perpendicularly to the boundary of two media.

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It pass through without bending

It is speed is faster int he optically denser medium

It derivates from its original path

It is totally reflected back

If slope of velocity time graph gradually decreases, then a body is said to have

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Negative acceleration

Positive acceleration

Uniform velocity

Variable velocity

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

A device used to measure the strain of an object and it is a type of resistor that changes value with applied strain is a

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thermistor

Strain gauge

Thermocouple

Potentiometer

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

Which of the following is invariant under Galilean transformation.

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Velocity

Impulse

Momentum

Distance

For the normal operation of transistor the emitter base junction is always.

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Zero biased

Reverse biased

Forward bised

Both a and b

Image formed by a concave lens is.

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Real

Magnified

Virtual

Real and magnified

The pressure necessary to liquify a gas at the critical temperature is called.

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Normal pressure

Atmospheric pressure

Critical pressure

Liquid pressure

Inductance divided by resistance and the product of capacitance and resistance both have units of.

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Charge

Time

Force

Current

Temperature changes when two balls collide which one of the following is conserved.

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Angular momentum

linear momentum

Velocity

Kinetic energy

A geostationary satellite covers

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100 ^o of longitude

120 ^o of longitude

130 ^o longitude

140 ^o of longitude

The erecting lens of a telescope produces

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A shorter instrument

wider field of view

A larger image

A sharp image

The conductivity of a conductor is independent of the

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Electric charge

Electric potential

Electric field

Internal resistance

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