Question # 1

The change in wavelength of an X-ray when scattered from an electron is called.

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Compton shift

Doppler shift

Stefan's law

Fraunhofer lines

The kinetic molecular model of matter describe matter an being made up of molecules in continuous.

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Vibratory motion

Random motion

rotatory motion

Linear motion

Cobalt -60 is a radioactive element with half life of 5.25 years. What fraction of the original sample will be left after 26 years.

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1/4

1/8

1/16

1/32

Radioactivity is the phenomenon associated with the.

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Transition of radiowaves

production of alpha particles only

Decay of nucleus

Reception of radio waves

The length of an astronimical telescope for normal vision is.

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fo x fe

fe/fe

fo - fe

fo + fe

Ethanol is a replacement of

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Gasoline oil

Kerosene oil

Refinery oil

vegetable oil

When Photon incident on a metal produce the emission of electrons the process is called.

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Photo electric effect

Pair production

x-rays production

Gama ray production

The change in the dimensions of a body produced by the action of the deformation force is known as.

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Strain

Stress

Tensile strain

Tensile stress

In four stroke cycle the crank makes

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One complete revolution

Two complete revolutions

three complete revolutions

Four complete reveolutions

LASER beam my be measure very large distance because it is.

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Inidirectional

coherent

Monochromatic

Not absorbed

A capacitor is connected to a battery The fore of attraction between the plate when the separation between them is halved will

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Remain the same

Become twice

Become 4 times

Become 8 times

By definition a gas is said to be have undergone adiabatic compressing when

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No heat exchange occurs between the gas and its surroundings

The gas is compressed quickly

The gas is compressed slowly

The temperature of the gas remains constant

Why should household appliances be connected in parallel with the voltage source.

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To increase the resistance of the circuit

To decreases the resistance of the circuit

To provide each appliance the same voltage as the power source

To provide each appliance the same current as the power source.

If a body retains completely its altered shape and size, it is said to be

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Perfecto elasticity

Perfect plasticity

Elasticity

elastic limit

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

A body at rest may have

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Speed

Momentum

Acceleration

Energy

Transistors with various combinations are widely used as switches in.

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electric generators

Rectificers

Amplifiers

Computers

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

The emf induced by the motion of a conductor across a magnetic field is called.

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Absolute potential

Motional emf

Induced emf

Terminal potnetial

The direction of induced emf during electromagnetic induction can be determined by making use of.

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Faraday's law

Ampere;s law

Lenz's law

Laplace law

If the transformer turns ratio is 2 and the impedance of primary coil is 250 Ohms then the impedance secondary coil will be.

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125 Ohms

250 Ohms

500 Ohms

1000 Ohms

A force passing through the centre of gravity of a body

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Causes its translational motion

Causes its rotational motion

Holds the body in equilibrium

Produces both translational and rotational motion.

NOR gate is a combination of.

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OR gate and NOT gate

OR gate and AND gate

OR gate and OR gate

NOT gate and AND gate

One calorie equals to

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1.2 J

2.2 J

3.2 J

4.2 J

The base unit of temperature in SI is

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Fahrenheit

Celsius

Kelvin

Rnakine

The scientist who first noted that a compass needle was deflected when in the neighborhood of a current carrying wire was.

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Joseph Henry

Hans Christian Oersted

Michael Faraday

J.J. Thomson

What is the number of degree of freedom of an oscillating simple gravity pendulum

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1

2

3

4

The maximum K.E of photo electrons depends upon

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Energy of incident radation

Frequency of incident radiation

Wavelength of incident radiation

Mass of incident radiation

Which of the following thermometers is the most suitable for measuring rapidly varying temperature.

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Thermocouple thermometer

Mercury in glass thermometer

Alcohol in glass thermometer

Platinum resistance thermometer

The mass of proton is equal to.

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1.673 x 10^-27 kg

1.673 x 10²⁷ kg

9.1 x 10-31 kg

9.1 x 10³¹ kg

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

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Critical energy

Binding energy

Gravitational energy

Electrostatic energy

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