Question # 1

Equipotential surfaces in an electric field are always.

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Spherical

Closed surfaces

Tangent to electric lines of force

Perpendicular to electric lines of force

An A.C. dynamo operates on the principle of

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Mutual induction

Self induction

Electromagnetic induction

Mechanical induction

If we double both the current and the voltage in circuit while keeping its resistance constant the power.

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Remains unchanged

Halves

Doubles

quadruples

The dimensions of work are

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[MLT-2]

[ML2T-2]

[ML2T-1]

[MLT-1]

For how long the sensation of sound persists in our brain.

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0.1 s

0.2 s

0.3 s

0.4 s

An operational amplifier have how many input terminals.

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One

Two

Three

Four

The nuclear model of the atom was derived partly from experiments involving the scattering of alpha particles performed by.

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Chadwick

Rutherford

Anderson

Einstein

Electricity is transmitted at high voltage rather than at low voltage because.

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It is generated at high voltage

It is safer

It requires less insulation

It wastes less energy

The energy following per second through a unit area held perpendicular to the direction of wave is.

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The loudness of the sound waves

The pitch of the sound waves

The intensity level of sound waves

The intensity of sound waves

Efficiency of a half wave recitifier is.

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Almost negigible

More than full wave rectifier

Less than full wave rectifier

Equal to full wave rectifier

Which of the following are electromagnetic waves.

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Alpha particles

Beta particles

Gama rays

Water waves

As the mass number increases, the binding energy per nucleon in a nucleus

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Increases

Decreases

Remain constant

Varies in a way that depends upon A

Which is the best sound source to produce a pure note.

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Tuning fork

Flute

Drum

Harmonium

The nib of fountain pan is split of convey ink down the nib by the phenomenon of.

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Adhesion

Cohesion

Osmosis

Capillary

Which scientist made the fist successful terrestrial measurement of the speed of light

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Isaac Newton

Ole Romer

Armand Fizeace

Albert Michelson

The maximum energy of photons emitted from ab X rays tube is certain to be increased by

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Increasing the voltage across the tube

Decreasing the voltage across the tube

Heating the metal target

Putting a barrier in the way of photons

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

In planetary motion

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Angular speed remains constant

Angular momentum remains constant

Linear speed remains constant

Linear momentum remains constant

The dimensions of torque are.

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[MLT-2]

[ML-1T-1]

[ML2T-2]

[ML-2]

Lines of Balmer series are emitted by hydrogen atom when the electron jumps from

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The first orbit to any other orbit

Higher orbits to second orbit

Higher orbits to first orbit

The third orbit to higher orbit

The reciprocal of decay constant lamda of a radioactive substances is equal to.

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total life

Half life

Mean life

Curie

The process of pair production will take place if the energy of photon is greater than

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0.21 MeV

0.51 MeV

1.51 MeV

1.21 MeV

Iron loss in a dynamo arises because of.

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The resistance of armature coil

The production of eddy current

The presence of mechanical friction

The leakage of flux

An object falls freely under gravity the vertical equilibrium of the body inside is

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Stable

Unstable

Neutral

Unknown

Which of the following form of electromagnetic energy has the highest frequency.

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X rays

Game rays

Ultraviolet waves

Infrared waves

The capacity of a spherical conductor is numerically equal to its.

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Surface area

Diameter

Radius

Volume

Which quantity provides a quantitative measure of disorder.

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Entropy

Enthalpy

Randomness

Chaos

Deuterium is

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A transuranic element

A type o cosmic particle

An isotope of hydrogen

An isotope of helium

A body of mass 2 kg is suspended from the celling of an elevator moving up with an acceleration 'g' its apparent weight in the elevator will be.

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9.88 N

19.8 N

29.4 N

39. 2 N

When two vectors have opposite directions we say that they are

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Parallel

Antiparallel

Perpendicular

Out of phase

The volume of a goas at constant pressure is directly proportional to the temperature as measured on the.

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Celsius scale

Kelvin scale

Fahrenheit scale

Baume scale

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