Question # 1

The charge on a helium nucleus is equal to the charge of.

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Two electrons

Two protons

Two neutrons

One proton

The two elements with same number of electrons but different mass number are called.

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Isotones

Isobars

Isotopes

Isomers

The internal inertia of a thermodynamics system is known as.

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Enthalpy

Entropy

Isotherm

Adiabatic

What does a dynamo generate

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Electrons

Emf

anion

Cation

A heart coil is out into two equal parts and only one part is now used in the heater The heat generated will be.

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Halved

One fourth

Doubled

4 times

How many terminals does a BJT have.

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1

2

3

4

A convex mirror is used to reflect light from an object placed 66 cm in front of the mirror. The focal length of the mirror is 46 cm Find the location of the image.

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23 cm

-23 cm

-27 cm

27 cm

Two sources of sound are said to be in resonance when.

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They look like similar

They produce sound of same frequency

They are enacted by the same agent

They differ from each other

How power factor of a circuit can be improved.

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Using capacitors

Using cokes

Using resistors

All of these

The immediate cause of alternating currrent in the secondary coil of a transformer is

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A changing electric field

a changing magnetic field

The motion of primary coil

The iron core of the trnasformer

The unit generally used for measuring astronomical distances is.

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Parsecs

Light year

Metre

Kilometer

Which scientist coined the term quantum mechanics.

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Kari mark

Max Born

Erwin schrodinger

Issac Newton

Which quantity has different base units from the other three.

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Density x volume x velocity

Rate of change of momentum

The Young's modulus x area

Weight

In free expansion of a gas. the internal energy of the system.

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Increases

Descreases

Remain unchanged

Becomes infinite

Why an ammeter is always connected in series in a circuit.

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Its resistance is very high

Its resistance is very low

its resistance is infinity

It does not draw current from the circuit

The minimum value of charge on any object is.

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1.6 x 10^-29 C

1.6 x 10^-19 C

1.6 x 10^-9 C

1 C

The unit of energy are the same as that of

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Force

Power

Work

Efficiency

The magnitude of resultant of three forces is 3. Its x -component is 2 and y component is 1, then its z-component will be.

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1

2

3

4

Which of the following electron wavelength is used in electron microscope.

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Short

Extremely short

Large

Moderate

The value of electric field intensity is.

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Volt

Coulomb

Newton

Newton coulomb

A 100 kg box is pulled 10 m across a frictionless horizontal surface by a 50 N force The change in the P.E. of the box a

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0 J

2 J

20 J

50 J

A disturbance that travels through space and time usually accompanied by energy transfer is called.

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sound

Wave

Echo

Frequency

Which form of electromagnetic radiation is used in RADAR.

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Long wavelength ultraviolet waves

short wavelength microwaves

short wavelength infrared wave

Long wavelength radiowaves

The velocity of sound will be greater in.

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Air

Water

Solids

Vacuum

A 4 kJ mass of copper of specific heat capacity of 400 J kg-1k-1 is heated for 160 s by a heater of power 200 W what is the rise in temperature.

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10 K

16 K

100 K

160 K

Which experiment confirmed the de Broglie hypothesis.

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Double slit experiment

Division germier experiment

Schrodinger's Cat experment

Bohr's experiment

The pressure necessary to liquify a gas at the critical temperature is called.

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Normal pressure

Atmospheric pressure

Critical pressure

Liquid pressure

Which of the following is invariant under Galilean transformation.

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Velocity

Impulse

Momentum

Distance

The ratio of the magnitude of charge on one of the two conductors in proximity to the potential difference between the two is called.

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Inductance

Reactance

Resistance

Capacitance

When the temperature of source and sink of a heat engine become equal the entropy change will be.

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Zero

Maximum

Minimum

Negative

As a positively charged rod is brought closer and closer to a positively charged electroscope the gold leaf.

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diverges

Converges

is neutralized

Is unaffected

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