Question # 1

Positive electric charge is the type of charge found on a rod which has been rubbed with silk and which is made of.

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rubber

Glass

Steel

Cork

Lenses of what diameter are usually not practical.

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Less than 1 m

Larger than 1m

Larger than 5 m

Larger than 10 m

Atomic reactor is based on

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Controlled chain reaction

Uncontrolledly chain reaction

Nuclear fission

Nuclear fusion

The simple form of particle accelerator is.

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Cathode ray tube

Oscillator

_Amplifier

Phase locked loop

What units are used to rate electrical fuses.

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Volts

Ampere

Watts

Hertz

who discovered taht mass and energy are forms of each other.

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Issac Newton

Albert Einstein

Galileo

Khawarizmi

On reflection of light from a source there occurs a change in

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Wavelength

Velocity

Period

Frequency

In vacuum all electromagnetic waves have the same.

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Frequency

Amplitude

Speed

Wavelength

Under steady state the temperature of a body

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Increase's with time

Decreases with time

Does not charge with time

None of the above

Which of the following will not acceleation.

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The moon in its orbit

A tennis ball rebounding from ground

A store in free fall

A car in which the engine thrust is equal to the friction

When the temperature of source and sink of a heat engine become equal the entropy change will be.

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Zero

Maximum

Minimum

Negative

The energy that must be added to separate the nucleus is called.

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Critical energy

Binding energy

Gravitational energy

Electrostatic energy

A longitudinal sinusoidal wave has a wavelength of 1 cm and a period of 2s. Its wave velocity is.

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50 cm s-1

0.00t m s-1

100 cm s-1

5 m s-1

Which of the following statemtents is worng.

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Charge is quantized

Charge is conserved

There is not field near an isolated charge at rest

A moving charge produces both electric and magnetic field.

A relationship between mechanical work and heat energy was firstly established dby.

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Davy

Count Rumford

Joule

Kelvin

The wave phenomenon that classifies light as a transverse wave is.

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Polarization

Diffraction

Interference

Refraction

The ratio of average induced emf to the rate of changing of current in the coil is called.

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Self induction

Mutual induction

Self inductance

Mutual inductance

The average energy released per fission of U is about

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200 eV

2 keV

2 MeV

200 MeV

Restoring force in SHM is.

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Centripetal

Frictional

Conservative

Non conservative

Photocells are used for

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Security systems

Counting systems

Automatic door system

All of the above

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

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Force

Torque

Momentum

accelerate

The specific heat capacity of the body depends upon.

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the heat given to it

Mass of the body

Temperature raised

Material of the body

The diver spins faster when moment of inertia becomes

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Smaller

Greater

Double

zero

The number 0.02 x 10^-8in standard form will be written as.

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2 x 10^-10

2 x 10^-8

20 x 10^-8

20 x 10^-6

In comparison with the electrostatic force between two electrons the electrostatic force between two protons is.

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Zero

Smaller

Greater

Same

In the direction indicated by an electric field line.

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The electric field strength must increases

The electric field strength must decreases

The potential must remain constant

The potential must decreases

When two identical travelling waves are superposed, velocity of the resultant wave

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Remains unchanged

Decreases

Increases

Become zero

Echoes arise from

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Reflection

Refraction

Diffraction

Dispersion of sound waves

It is possible is distinguish between transvers and longitudinal waves from the property of.

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Refraction

Interference

Diffraction

Polarization

Which type of solid have definite melting point.

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Crystalline solids

Amorphous solids

Glassy solids

Polycrystalline solids

The relation between the voltage and current that flows in a resistor is.

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V = 1/R

R = vi

V = I2 R

I = V /R

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