Question # 1

The length of an astronimical telescope for normal vision is.

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fo x fe

fe/fe

fo - fe

fo + fe

Which one of the following represents an ohm.

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Volt per ampere

Joule per second

Watt per ampere

Joule per coulomb

The measure of how strongly a material oppose the flow of electrical current is known as

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Electrical resistivity

Specific electrical resistivity

Volume resistivity

All of the above

Which of the following is heat transfer by means of the emission or absorption of electromagnetic radiation such as sunshine.

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Conduction or diffusion

Convection

Radiation

Mass transfer

A physical quantity not directly involved in rotating motion is.

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Moment of inertia

Mass

Angular velocity

Torque

Which electrical component may be used to store electrical energy in a time delay circuit

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Capacitor

Light dependent resistor

Resistor

Thermistor

Which of the following is not electromagnetic .

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x-rays

Gama rays

Cathood rays

Infrared rays

The resistance between(+) and (-) inputs of an amplifier is.

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Zero

Low

High

Infinity

A water wave is an example of.

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Transverse wave

Longitudinal wave

Hair wave

Shock wave

If the K.E. of a body becomes four times of its initial value the new momentum will be.

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Half

Same

Four time

Double

The process of getting energy by direct combusting method from the waste products is commonly known as.

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Solid waste

Depletion region

Green house

Fregmentation

Any substance that can flow is a

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Solid

Gas only

liquid only

Fluid

Compton scattering experiment seemed to indicate that radiation had

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Wave nature

Particle nature

Wave particle nature

X-rays nature

The first successful quantitative theory of atomic structure was formulate by

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David Bohm

Louis de Broglie

Neil Bohr

J Jj. Thomson

The focal length of a thin converging lens is 10 cm What is the maximum distance from the lens that the object can be placed so the lens acts as a magnifying glass.

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5 cm

10 cm

15 cm

20 cm

Which law states that a change in the internal energy of a closed thermodynamic system is equal to the difference between the heat supplied to the system and teh amount of work by the system on the surrounding.

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Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

The distance between the optical centre and principal focus is

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Focal plane

Focal length

Optical centre

Principal axis

interference and diffraction of light support the

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Wave nature of light

Transverse nature of light waves

Quantum nature of light

Electromagnetic nature of light

The half life of a radioactive substance is 6 years What is the time taken by 12 g of this substance to decay completely.

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12 years

24 years

48 years

infinity

Two electrons approach each other their relative velocity will be.

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Zero

c

c/2

Infinity

The escape velocity

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Is independent of mas of the body

Increases with the increases of mass of the body

Decreases with the decreases of mass of the body

Depends upon the type of body used

The near point of a person is 50 cm and his far point is 200 cm The power of the lenses which his spectacles should have for reading will be

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+D

+2D

+4D

-2D

If average acceleration is equal to instantaneous acceleration then the body's said to be moving.

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Negative acceleration

Positive acceleration

uniform acceleration

Variable acceleration

The bunding energy per nucleon for iron is.

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zero

Maximum

Negative

Minimum

Lenz's was a physicist of.

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America

Russia

Japan

China

A convex lens of focal length 6 cm to be used to from a virtual image three times the size of the object Where must the lens be placed.

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1 cm

2 cm

3 cm

4 cm

A mason of 9.8 N weight is climbing on a 20 m high ladder The P.E. of mason at the middle of ladder is.

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98 J

196 J

960.4 J

980 J

The change in entropy for any reversible cycle is identically

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Infinite

Positive

Negative

Zero

Which thermodynamic law state taht the entropy of a perfect system approaches zero.

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Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

The binding energy to pull the deuterium H apart into a proton and a neutron is equal to.

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1.22 MeV

2.22 MeV

3.22 Mev

4.22 MeV

Shadow formation and the pin hole camera illustrate the

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Phenomenon of reflection

Phenomenon of refraction

Phenomenon of total internal reflection

Rectilinear propagation of light

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