Question # 1

The focal length of convex lens having magnifying power of 5.55 is:

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5.5 cm

5 cm

4.5 cm

6 cm

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

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Power

Work

Pressure

None of these

Average KE of a gas molecule has:

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Direct relation with absolute temperature and inverse relation with pressure

Direction relation with both absolute temperature and pressure

Inverse relation with both absolute temperature and pressure

None of these

The only significant motion possessed by the mono-atomic gas represented is:

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Translatory

Rotatory

Vibratory

None of these

In the expression of force experienced by electron, the direction of both v and B are

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parallel

zero

perpendicular

none of them

Fog droplets are suspended in air when their weight is balanced by:

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Force of gravity

Upward trust due to air

Surface tension

None of these

Energy is not carried by

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Transverse progressive waves

Longitudinal vibration

Stationary waves

Electromagnetic

The value of relative permittivity of different dielectrics are:

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Equal

Different

Greater than one

Smaller than one

Both (B) and (C)

Electric intensity at a place due to a charged conductor is a

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Scalar quantity

Vector quantity

Semi vector and semi scalar

Dimensionless quantity

Both A and D are true

The curve representing an adiabatic process is called

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isotherm

adiabat

adiable

none of them

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

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Longitudinal wave

Transverse wave

No vibration at all

None of them

A solenoid is a coil of wire which is:

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Short, loosely wound, cylindrical

Long, tightly wound, spherical

Long, loosely wound, cylindrical

Long, tightly wound, cylindrical

None of these

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60km/h. His average speed will be

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40 km/h

48 km/h

50 km/h

60 km/h

The concept of field theory was put forward by

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Franklin

Kepler

Oersted

Michael Faraday

In a three phase a.c. generator, there are

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2 coils

3 coils

1 coild

No coil

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

Real gases strictly obey gas law at:

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High pressure and low temperatures

Low pressures and high temperatures

High pressures and high temperatures

None of these

Work-energy principle states that work done on the body by applied force is equal to change in:

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Potential energy

Kinetic nergy

Linear momentum

None of these

All trigonometric functions (sine, cosine, tangent etc) are positive in:

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1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

For production of beats the two sources must have

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Different frequencies and same amplitude

Different frequencies

Different frequencies, same amplitude and same phase

Different frequencies and same phase

In gases, the charge carries are:

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Electrons

Positive ions

Negative ions

Both (A) and (C)

Both (A) and (B)

Another mean of electric potential energy per unit charge is given by:

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Electric intensity

Potential gradient

Electric Flux

Potential difference

None of these

The study of physics involves?

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Structure of space and time

Interaction of electromagnetic radiation with matter

Both of them

Chemical changes

None of them

According to the special theory of relativity, time is

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absolute quantity

not absolute quantity

constant quantity

none of these

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

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Coulomb's law

Gauss's law

Biot-Sarwat law

Ampere's law

From sand, we get a material used for construction of computer chips. That material is called:

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Germanium

Silicon

Copper

Lead

If a wave can be polarized, it must be

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An electromagnetic wave

A longitudinal wave

A progressive wave

A transverse wave

Op-amp has been discussed as comparator of:

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Distances

Voltages

Velocities

Magnetic fields

Both (A) and (C)

Addition of 2.189 kg, 0.089 kg, 11.8 kg, and 5.32 kg gives the rounded off answer as:

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19.398

19.400

19.4

19.3

Alternating current can not be measured by D.C. ammeter because

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A.C. can not pass through D.C. Ammeter

A.C. changes direction

Average value of current for complete cycle is zero

D.C. Ammeter will get damaged

The heat required to raise the temperature of one mole of the substance through 1 K is called

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heat capacity

specific heat capacity

molar specific heat

all of them

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