Question # 1

Who proposed that light energy travels in space by means of wave motion.

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Maxwell

Planck

De-Broglie

Huygen

The study of atomic structure of crystals by x rays was initiated by.

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Mosely

Young

Huygen

Bragg

A wave which consists of a single, non repetitive disturbance is called a

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Continous wave

Pulse

Longitudinal wave

Transverse wave

In a transistor which one is very thin.

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Collector

Emitter

Base

Depletion region

Which of the following SI units is not named after any physicist.

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Hertz

Joule

Volt

Candala

Which of the following describes that the time interval between two events may be different in different of references

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Simullaneously

Time dilation

Length contraction

Mass variation

In a resistor, when base width decreases with increasing Vbc, this phenomenon is called.

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Tunneling

Thermal runway

Pinch off

Early effect

Increase in velocity of sound in air for 1 ^oC rise in temperature is.

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0.61 m s-1

1.61 m s-1

2.00 m s-1

61.0 m s-1

Express the quantity 225 x 10^-6 s using prefixes.

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0.225 micro second

2.25 micro second

225 micro second

2,25 neno second

Which one is the primary standard for temperature measurement.

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Resistance thermometer

Mercury in glass thermometer

Constant volume gas thermometer

Pyrometer

Beats are the result of.

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Interference

Doppler's effect

Ultrasound

Polarization

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

Which of the following is non renewable source of energy.

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Wind

Coal

Hydroelectric

Biomass

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

The ratio of the rms value of the applied voltage to the rms value of resulting A.C. is called.

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Reluctance

Impedance

Reactance

Resistance

During transition, atom cannot emit

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Visible light

Ultraviolet radiation

Infrared radiations

gama rays

Fluid mechanics is the study of how fluid move and the other ting involved is

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Energy

Velocity

Forces

Position

The energy of neutrons obtained during a fission reaction is.

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0.1 MeV

1 KeV

1 MeV

Zero

Current per unit area is called.

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Electric potential

Current density

Charge density

Electric intensity

The ration of intensity of magnetization to the magnetic force is known as.

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Parmeability

Magnetic induction

Magnetic intensity

Magnetic susceptibility

Two simple pendulums of the same length but having different masses

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Have different frequencies

Will have period proportional to their masses

Will have periods independent of their length

Have the same period

When we decrease the diameter of the objective lens of a telescope the resolution of telescope

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Increases

Decreases

Remain the same

Depends upon the focal length of the lens

When of the following colours scatters minimum.

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Blue

Violet

Yellow

Red

Two lenses of focal length 'f' are combined the resultant focal length is

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f

2f

f/2

zero

An electric lamp use energy at the rate of 46 W on a 12 V supply. How much charge passes through the lamp in 2s.

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0.15 C

0.50 C

2.0 C

8.0 C

Gases have

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Fixed shape

Fixed volume

Fixed shape and volume

No fixed shape and volume

Newton proposed his corpuscular theory on the basis on

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Newton's rings

Polarization

Dispersion of white light

Rectilinear property of light

Michelson's interferometer can b e sued to find

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Velocity of light

Velocity of sound

Wavelength of light

Wavelength of sound

When a solid is melting the temperature remains constant even through heat is being supplied because the

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Heat is being used to break up the intermolecular bonds

Solid is not absorbing any heat

Molecules are moving faster

Molecules are farther a part

If an object moves with velocity of light the apparent mass of the object as compared to list original mass is

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greater

Smaller

Same

zero

The scalar product of two vectors in negative when

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Vectors are parallel

Vectors are antiparallel

Vectors and perpendicular

Vectors are parallel with same magnitude

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