Question # 1

Pressure exerted by a gas on the walls of its container in due to

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adhesion between the gas molecules and the container

cohesion between the gas molecules and the container

collision between the gas molecules and the container

surface tension of the gas

When the surfaces are coated with a lubricant, then they

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Stick to each other

Slide upon each other

Roll upon each other

None of these

In a heat engine, heat is supplied by the

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cold reservoir

sink

hot reservoir

none of them

The pressure exerted by the gas is

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directly proportional to the P.E

inversely proportional to the P.E

inversely proportional to the K.E

directly proportional to the K.E

A semi-conductor in its extremely pure form is known as

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extrinsic semi-conductor

intrinsic semi-conductor

either of them

none of them

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

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modification

voltage

current

resistance

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

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1.7 x 10³J

10.2 x 10³J

3..4 x 10³J

6.8 x 10³J

If we increase the distance between two plates of the capacitor, the capacitance will

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Increase

Decrease

Remain same

First increase then decrease

The Instantaneous value of alternative current maybe:

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The same as its RMS value

Greater than its Rms value

The same as its peak value

Any of these

None of these

The value of the input resistance of OP-AMP is of the order of

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few ohms

few hundred ohms

several kilo ohms

several maga ohms

The time period of a simple pendulum is independent of its:

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Length

Mass

Value of g

Both A and B

The change of magnetic flux through a circuit will produce

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Magnetic Field

Electric Field

emf

a.c

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

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1 : 2

2 : 3

3 : 4

8 : 9

When a mass 'm' is pulled slowly, the spring stretches by an amount x₀,then the average force would be

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F= Kx₀

F=1/2Kx₀

F=2Kx₀

F=4Kx₀

In metallic crystals which of the following thing remains constant

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amplitude of oscillations

temperature of solid

average atomic positions

all of them

Which one of the following is dimensionless:

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Acceleration

Velocity

Density

Angle

In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is

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8

4

6

7

In the forward biases situation, the current flowing across the p-n junction is a few:

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amperes

Milli amperes

Micro amperes

Pico amperes

None of these

Electric potential of earth is taken to be zero because the earth is good

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Semiconductor

Conductor

Insulator

Dielectric

There is present in paraffin a large amount of:

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Nitrogen

Hydrogen

Carbon

Baryllium

Lithium

X-ray are also known as

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Roentgen rays

Maxwell rays

Plank range

Einstein rays

If force and displacement are in opposite direction, the work done is taken as:

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Positive work

Negative work

Zero work

Infinte work

When brakes are applied to a fast moving car, the passengers will be thrown:

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Forward

Backward

Downward

None of these

In magnet-coil experiment, emf can be produced by

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Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving

Relative motion of the loop and magnet

Any one of above

All above

Electron volt is the unit of.

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Potential difference

Energy

Resistance

Capacitance

Field lines are closer to each other in the region where the field is:

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Stronger

Weaker

Much weaker

Absent

None of these

An object moving through a fluid experiences a retarding force called a

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frictional force

terminal force

opposing force

drag force

The locus of all the points in the same phase of vibration is called:

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Wave packet

Wave front

Wave number

None of them

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

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Greater than

Less than

Equal to

None of these

Example of progressive wave is

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transverse waves

longitudinal waves

both of them

none of them

Force is a:

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Scalar quantity

Base quantity

Derived quantity

None of these

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