Question # 1

An alternation produced in shape length or volume when a body is subjected to some external force is.

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Deformation

Polymerization

Crystallization

Elasticity

Power of lens is measured in

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cm

Metres

cm-1

Dioptres

The process in which pressure of the system remains constant.

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Isothermal process

Isochoric process

Isobaric process

Adiabatic process

The power of convex lens of focal length 50 cm will be

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1,0 dioptre

2.0 dioptre

4.0 dioptre

5.0 dioptre

Mutual inductance has a practical role in the performance of the

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Radiochoke

Transformer

Generator

Trnasistor

During solid ficain the temperature.

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Remains constant at the freezing point

Increases at the freezing point

Decreases at the freezing point

Decreases at the melting point

If in Young's double slit experiments the separation between two slits is halved then the fringe width

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Remains unchanged

Becomes double

Reduces to half

Becomes 3 times

The phenomenon of Brownian motion shows that

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Molecules exist and can be seen as bright dots moving about

Molecules moves about randomly at highs speeds

Smoke particles behaves as molecules

Smoke particles can be used as models of air molecues.

Cs - 137 is a radioisotope used ot determine the thickness of the walls of steel pipes Cs 137 is chosen because it emits

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Radiowaves

Alpha particles

Beta particles

gama particles

Absolute P.E. of a body can be calculated

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At centre of the earth

Below centre of the earth

From surface of the earth

Below surface of the earth

In the case of forced oscillations frequency of oscillation is.

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The natural damped frequency

The natural undamped frequency

The frequency of the external periodic force

Some other frequency

A body is said to be in complete equilibiurm when

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It attains translational equilibrium

Vector sum of all the forces is zero

Vector sum of all the torques is zero

Vector sum of all the torque and forces is zero

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 spectrum of radiation due to transitions between energy levels in an atom, other absorption or emission is called.

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Atomic spectrum

Molecular spectrum

Grating spectrum

Normal specturm

All particles, of a wave front vibrate

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In same phase

In opposite phase

Upward down

Left and right

The specific heat of an ideal gas values as

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To

T1

T2

T3

The moment of inertia depends upon

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Mass of the body and its radius

Mass of the body and its angular speed

Mass and angular momentum

Mass as well as the distribution w.r.t axis of rotation

A generator running in reverse may be called as.

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A.C. Generator

D.C. generator

Motor

Commutator

Inductance divided by resistance and the product of capacitance and resistance both have units of.

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Charge

Time

Force

Current

Light year is a unit of

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Light

Velocity

Time

Distance

A pair of point charges with equal magnitude and opposite sign separated by a distance 'r' produce.

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Electric dipole

Electric charge

Electric field

electric arc

Plane polarized light can be produced by

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Reflection

Refraction

Scattering of light

All of these

at room temperature the p.d. between the two sides of depletion region for silicon is of the order of.

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0.3 V

0.5 V

0.7 V

0.9 V

Which one of the following represents an ohm.

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Volt per ampere

Joule per second

Watt per ampere

Joule per coulomb

The magnetic flux density at the centre of a long solenoid is dependent on.

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The number of turns per unit length of the silenced

The volume of the solenoid

The diameter of each turn of the solenoid

All of above

Angular frequency time period and frequency in SHM do not depend upon.

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Mass

Force constant

Amplitude

All of these

The image formed on the film of a simple camera is.

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Real inverted and diminished

Virtual, upright, and diminished

Virtual, upright and magnified

Real, inverted and magnified

When a force is applied on a body several effects are possible which of the following effect could not occur.

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The body speeds up

The body changes direction

The pressure on the body increases

The mass of the body decreases

A capacitor of capacitance F micro is fully charged from a 20 V d.c supply what is the energy delivered by 20 V supply.

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2 mJ

10 m j

20 mJ

25 mj

Temperature of a gas is related to.

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Total K.E. of the gas molecules

The K.E. of the centre of mass of the gas

The P.E. of the centre of mass of the gas

Total K.E. of the molecules w.r.t the centre of mass of gas

The image formed by a projector is

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Real, inverted and enlarged

Real, upright and enlarged

Real ,inverted and diminished

Virtual, upright and diminished

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