Question # 1

What is a measure of the separation of positive and negative electrical charges in a system of charges.

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charge polarization

Electric dipole moment

Electric field

Electrostatic induction

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

The addition of two or more waves is termed as

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Interferences

Period

Echo

Polarization

Let at constant temperature the pressure of an ideal gas be doubled so that the new volume is.

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Doubled the original volume

Same as original volume

Reduced to half the original volume

Reduced to two times the original volume

In water drops rainbows are formed by

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Reflection

Refraction

Dispersion

All of these

The working of the rocket is based on the principle of.

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Electromagnetism

Conservation of momentum

Floatation

Hydraulic system

When a diamagnetic substance is inserted in a current carrying coil the magnetic field is

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Decreased

Increased

unchanged

Increased or decreased, depending upon the relative volume of the substance

The total number nucleons in a nucleus are called.

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Mass number

Atomic number

Neutron number

Isotopes

In a simple D.C. motor the direction of current in the motor is reversed every half revolution to keep the motor turning in the same direction which part of the motor does this.

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Brushes

Coil

Commutator

Poles

Which of the following is an example of irreversible process.

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Melting of ice

Work done against friction

Pettier heating and cooling

All isothermal and adiabatic changes

When the velocity of body is doubled which one is doubled too.

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K.E.

P.E

Momentum

Acceleration

The sound velocity in moist air as compared to dry air will be

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More

Less

Same

zero

A simple astronomical telescope consists of two

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Concave lenses

Convex mirrors

Convex lenses

Plano convex lenses

Which is the famous standard model of the universe.

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the big bang

Casmos

Astronaut

The small stap

A resistor whose resistance decreases with increasing intensity is.

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Light dependent resistor

Thermistor

Thermocouple

Strain gauge

A device used to determine mass of an isotope quite accurately is known as.

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Spectrometer

Mass spectrometer

Mass detector

Electronic balance

The mass of an alpha particle is.

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2 u

4 u

6 u

8 u

The energy transmitted per second though unit are held perpendicular to the direction of propagation of the wave is called.

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Intensity of sound

Pitch of sound

Loudness of sound

Quality of sound

A 800 W toaster and a 1.3 kW frying pan are plugged into the same 120 V lines, then

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Fuse will not blow

Fuse will blow

Supply will spark

Only toaster can work

Crystalline solids are of.

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Short range order

Long range order

Intermediate range

Plastics

When the frequency of A.C in L - C- R circuit is incrased the impedance of L-C-R circuit.

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Increase

Decrease

Remain unchanged

First decrease and then increases

Which quantity remains fixed in isobars.

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Mass number

Atomic number

Number of neutrons

Number of protons

What will be the effect on the speed of a Transerv wave in a string. If tension is made 4 times.

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Remains the same

Increase a times

Becomes double

Becomes 3 times

Velocity of sound in air at a given temperature

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Increases with increase in pressure

Is independent of the pressure

Decreases with increases in density

Increases with increase in density

What is the human body temperature in Celsius scale.

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30 oc

36. 9 oC

98. 4 oC

100 oC

The exitance of more than one distinct state with the same energy is called.

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Exigency

Degeneracy

Normally

Emergency

Which one of the following has the largest wavelength.

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x rays

Infrared rays

Visible light

Radio waves

When transistor works as an amplifier, its output is.

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More

Less

Zero

Directly proportional to the input

Nuclear force exists between

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Proton proton

Neutron -neutron

neutron -proton

All of these

The pitch of sound depends on its

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Wavelength

Frequency

Wave amplitude

Harmonic content

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

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1536

1636

1736

1836

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