Question # 1

According to kinetic energy of gases one assumes that the collisions between the molecules are.

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Perfectly elastic

Perfectly inelastic

Partly elastic

Partly inelastic

The product of force and duration of impact is called.

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Density

Momentum

Torque

Impulse

Which law states that an induced current is always in such a direction as to oppose the motion or change causing it.

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Ampere's law

Gauss's law

Lenz's law

Kirchoff's law

The input resistance of a JFET is of the order of.

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1 M Mega

10 M Mega

100 M Mega

1,000 M Mega

The specific heat capacity of a substance is the amount of heat required to.

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Raise its temperature by 1 K

Raise the temperature of 1 kg of the substance by 1 K

Melt 1 kg of the substance

Boil 1 kg of the substance

In a cloud chamber the Alpha particles leave

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Dense, straight and continuous tracks

Only straight and continuous tracks

Thin and discontinuous tracks

Irregular tracks

The impedance of the circuit at resonance frequency is

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Minimum

Maximum

Zero

Infinity

if temperature eon Celsius scale is 50 oC the temperature on Fahrenheit scale will be.

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102 ^oF

108 ^oF

112 ^oF

122 ^oF

Neil Bohr made his three postulates in.

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1897

1905

1913

1921

Magnetic effect of current was discovered by

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Faraday

Fleming

Oersted

Ampere

An active component of an electronic circuit consisting of a small block of semiconducting material to which at least three electrical contacts are made is known as.

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Rectifier

Amplifier

Thermocouple

Transistor

If a conductor sun infirmly stretched so that its length is increased in timed, then its resistance becomes.

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n times the original resistance

1/n times the original resistance

n2 times the original resistance

n3 times the original resistance

Difference between Cp and Cv is equal to

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General gas constant

Planck's conatant

Molar gas constant

Boltzmann's constant

Capacitance is directly proportional to

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Distance between the plates

Di electric strength

Area of the plates

Charge multiplied by the applied voltage

When a ray of light is incident perpendicularly to the boundary of two media.

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It pass through without bending

It is speed is faster int he optically denser medium

It derivates from its original path

It is totally reflected back

Three tuning forks of frequencies 400 Hz. 401 Hz and 402 Hz are sounded together The frequency of beats per sound is.

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0

1

2

3

What type of process is the Carnot's cycle.

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Reversible

Irreversible

Neither reversible nor irreversible

May be reversible or irreversible

in the region where the field lines are parallel and equally spaced, the field is.

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Zero

Unirorm

Non uniform

Negative

In alternating current circuits the quantity which plays the same role as resistance in direct current circuits is called.

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Reactance

Admittance

Conductance

Impedance

In electromagnetic spectrum X-rays are next to.

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Water waves

Radio waves

ultraviolet waves

Infrared waves

Frequency of second pendulum is.

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0.5 Hz

1.0 Hz

1.5 Hz

2.0 Hz

Restoring force in the SHM is

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Centripetal

Frictional

Conservative

Non conservative

Internal energy of a gas decreased when

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It gains heat

Change in cycle

Change in adiatatic

Change in reversible

The ratio of specific heat capacity to motor heat capacity of a body

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Is a universals cantante

Depends upon the mass of the body

Depends upon the molecular weight of the body

Is dimensionless

Which is the heat transfer mode between an object and its environment due to circular fluid motion.

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Conduction

Convection

Radiation

Mass transfer

The period of a geostationary satellite is.

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32 hours

72 hours

48 hours

96 hours

The ionization energy for hydrogen atom is

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-11.6 eV

-12.6 eV

-13.6 eV

-19.6 eV

a 2,000 kg heavy truck travelling at 36 km h-1 strikes a tree and comes to a stope in 0.1 s The average force on the truck during the crash is.

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2 x 10² N

2 X 10³N

2 X 10⁴ N

2 X 10³ N

What does a dynamo generate

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Electrons

Emf

anion

Cation

When a solid is melting the temperature remains constant even through heat is being supplied because the

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Heat is being used to break up the intermolecular bonds

Solid is not absorbing any heat

Molecules are moving faster

Molecules are farther a part

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

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