Question # 1

The cohesive forces between atoms, molecules or ions in crystalline solids maintain the strict

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short range order

long range order

both of them

none of them

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

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Stronger

Weaker

Much weaker

Absent

None of these

Cause of heat production in a current carrying conductor is

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Collisions of free electrons with one another

High drift speed of free electrons

Collisions of free electrons with atoms or ions of conductor

High resistance value

In rotational motion, analogue of force F us called:

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Couple

Torque

Mass

Moment of intertia

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 the coil

Relative motion of the loop and magnet

Any one of above

All above

Distance covered by a freely failing body n the first second of its motion will be:

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4.9 m

9.8 m

19.6 m

29.4 m

Resolving power in mth order diffraction for grating is given by:

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R = N/m

R = m/N

R = N x m

None of these

The power dissipation in a pure inductive or capacitance circuit is

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maximum

positive

zero

none

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

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2V

3V

0.5V

V

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

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Maximum

Minimum

Zero

Very small

None of these

If the error in the measurement of radius of a sphere is 1% then the error in the measurement of volume will be

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1.1%

3%

5%

8%

Thermodynamics is the branch of physics deals with the conversion of heat energy into

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Electrical energy

Mechanical energy

Solar energy

None of these

By the slope of velocity time, we can determine the

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Acceleration

Constant velocity

Average velocity

Average acceleration

A pulsating DC can be converted into constant voltage by using

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Filter

Full wave rectifier

Half wave rectifie

Bridge rectifier

Force of friction between different layers in present in

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Gases

Solids

Liquids

Both A and C

The twinkling of stars is due to

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The fact that stars do not emit light continususly

The refractive index of the earth's atmosphere fluctuate

Intermittent absorption of star light by its own atmosphere

None of these

The magnetic field due to the electric current in a conducting wire is:

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Towards the centre of the conducting wire

Circular around the conducting wire

In the direction of the electric current

In the direction opposite to the electric current

In a laminar flow of non-viscous fluid along a horizontal pipe,the work done per second by the pressure at any section is equal to

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The pressure

Pressure x volume per second

Pressure x area of cross-section

Pressure x volume

The burnt gas expelled from the rocket engine with

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High velocity

Extremely high velocity

Very high velocity

None of these

Polaroids are used in

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Sun glasses

The production and analysis of plane polarized light

Stereoscopic motion picture

All of these

A cell of negligible resistance and e.m.f 2 V is connected across a series combination of 2,3 and 5 ohms. The p.d. across the 3 Ω resistor is

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0.6 V

1/3 V

2/3 V

4/3 V

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