Question # 1

In a crystal lattice

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Atoms are arranged in an order way

Atoms are arranged in a random way

Holes are arranged in an order way

Electrons are arranged in an order way

In order to measure the true emf of an electrolytic cell it is necessary that.

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The measurement be made while charging the cell

No current be drawn from the cell

The cell be connected into a type circuit

The cell be connected into a parallel type circuit

In which form energy in an inductance coil is stored.

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Heat energy

Light energy

Magnetic energy

Nuclear energy

A heater which is to be used on a 250 V mains circuit, has a 5 A fuse in its plug Which of the following is the most powerful heater that can be used with this fuse.

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150 W

500 W

1,000 W

2,000 W

When impurities are added to metals they

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Will decrease the elasticity

Will increases the elasticity

Will not change the elasticity

Will or will not change the elasticity

How power factor of a circuit can be improved.

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Using capacitors

Using cokes

Using resistors

All of these

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

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Zero

Unirorm

Non uniform

Negative

What information is given by the tangent to a field that point of electric field.

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Magnitude

Direction

Proper unit

Dimensions

The value of voltage or current that exists in a circuit at any instant of time measured from some reference point is its.

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Peak value

Peak to peak value

Instantaneous value

Average value

A positive and a Negative charge are initially 4 cm apart When they are moved closer together so that they are now only 1 cm part the force between them is.

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4 times smaller than befor

4 times larger than before

8 times larger than before

16 times larger than before

A voltmeter is a

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High resistance galvanometer

Low resistance galvanometer

Zero resistance galvanometer

Infinite resistance galvanometer

Super conductor are used in

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Fast computer chips

Magnetic resonance imaging

Magnetic levitation trains

All of the above

When a magnet is moved into the coil of wire there is a small reading on the galvanometer Which change would increase the size of the reading.

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Pushing in the S-pole

Pulling the magnet out

Unwinding some of the turns of wire

Moving the magnet faster

Such an inductor coil which does not consume energy and is often employed for controlling A.C. without consumption of energy is called.

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Reactance

Choke

Impendence

Diode

In a half wave rectifier the rms value of the A.C. component of the wave is.

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Less than D.C. value

Great her than D.C. value

Equal to D.C. value

Zero

What type of current is produced by batteries.

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Direct current

Alternating current

Pulsating current

Convection current

The value of mutual inductance can be increased by

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Decreasing number of turns in the coil

Increasing number of turns in the coil

Winding the coil on china clay

Winding the coil on wooden frame

The SI unit of magnetic flux is.

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N A-1

N m-1 A

N m A-1

N m-1 A-1

Equipotential surfaces in an electric field are always.

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Spherical

Closed surfaces

Tangent to electric lines of force

Perpendicular to electric lines of force

Which law states that magnetization is inversely proportional to temperature for a fixed value fo the field.

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Curie's law

Voltmeter

Ammeter

Wattmeter

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

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