Question # 1

The resistance of a wire does not depend upon.

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Area of cross section of the wire

Length of the wire

Temperature of the wire

Current passing though the wire

Reverberation is the

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Presence of large number of overtones

presence of harsh and discordant notes

Presence of ultrasonic vibrations

Persistence of audible sound after the source has stopped

Difference in the density of two medium when waves are passing from one into another medium always results in the change in.

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Wave speed

Wave direction

Both speed and direction

Wave frquency

The emission of electrons from a metal surface when exposed to light of suitable frequency is called.

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Pair production

Compton effect

Photo electric effect

Zeeman effect

The pulsating outflow of blood from the heart by alternate systole and diastole is smoothed out by

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The blocking action of the heart's valves

The viscosity of the blood

The effect of gravity

the elasticity of the blood vessels

How much large is the proton mass than the electron mass.

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1536

1636

1736

1836

In the magnetic circuit concept the quantity analogous to electric current in electric circuit analysis is.

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Magnetic flux density

Permeability

Magnetic field intensity

Magnetic flux

The image of distant object as seen through as astronomical telescope is.

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Real and inverted

Virtual and inverted

Real and erect

Virtual and erect

In Isochoric process there is no

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Work done

Internal energy change

Volume change or work done

Heat exchanged

A bat while flying determines the location and nature of object in his way by sending.

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Infrasonic waves

Ultrasonic waves

Supersonic waves

Ultraviolet waves

There are how many types of forces or interactions.

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Two

Three

Four

Five

Which type of solid have definite melting point.

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Crystalline solids

Amorphous solids

Glassy solids

Polycrystalline solids

The special theory of relativity was presented by

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Albert Einstein

Newton

Maxwell

Planck

A junction between P-Type and n-type materials is called.

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Ampilifier

Transistor

Rectifier

Diode

In a magnifying glass, the objective is placed at a distance

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Less than the focal

Between the focal length and twice the focal length

Greater than twice the focal length

At the focus of the lens

The most convenient unit for energy at the atomic level is.

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Joule

Watt second

Newton metre

Electron volt

Base current of a transistor is 1 mA and collector current is 99 mA What is emitter current.

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1 mA

100 mA

98 mA

110 mA

The time period of a simple pendulum is independent of its.

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Length

Mass

Acceleration due to gravity

Restoring force

A spring obeying Hooke's law has an upstretched length 50 mm and a spring constant of 400 N m-1 What is the tension in the spriing when its overall length is 70 mm.

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8 N

28 N

160 N

400 N

Image formed by a camera is

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Real, inverted, and diminished

Virtual, upright and diminished

Virtual, upright and magnified

Real, inverted and magnified

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

Half life of a radioactive elements 10 minutes If the initial cont. rate is 368 counts per minute for what time count rate reaches 32 counts per minute.

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20 minutes

40 minutes

80 minutes

120 minutes

Which of the following is deflected by an electric field.

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Alpha particles

X rays

Gama rays

Neutrons

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 cause of ferromagnetism is.

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Orbital motion of elections

spin Motion of electrons

Permanent dipole memento

Spin angular momentum

who gave the law of equipartition.

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Maxwell

Carnot

Claussius

Boltzmann

Electromagnetic waves transmit.

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Energy only

Momentum only

Energy and momentum

Light

Why should the metal casing of an electrical fire be earthen.

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To complete an electrical circuit.

To prevent the fire from overheating

To reduce the risk of electric shocks

To stope the casing from getting too not to touch

If mass attached to a spring increases then its time period.

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Increases

Decreases

Remains constant

Decreases slightly

In an oscillating system damping means reduction in

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Frequency

Wavelength

Amplitude

Period

Which current can pass through a capacitor continuously.

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Alternating current

Direct current

Eddy current

Pulsating current

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