Question # 1

The direction of induced emf during electromagnetic induction can be determined by making use of.

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Faraday's law

Ampere;s law

Lenz's law

Laplace law

An ammeter can be converted into a voltmeter by connecting a

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Low resistance i series

High resistance in series

High resistance in parallel

Low resistance in parallel

The best instrument used for the measurement of emf of a cell a

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A voltimeter

An ammeter

A potentiometer

Wheatstone bridge

For an A.C. circuit the power factor is

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Always les than one

Always greater than one

Always equal to one

Absent

What is the direction of the magnetic field lines inside a bar magnet.

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From north pole to south pole

From south pole to north pole

From side to side

There are no magnetic field lines

On which principle the induction coil works on.

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Self induction

Ampere's rule

Mutual induction

Gauss's law

Which material has the larges resistivity.

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Silver

Germinium

Amber

Sulphur

Which of the following quantity in analogous to temperature in electricity.

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Charge

Resistance

Inductances

Potential

Electromotive force is closely related to.

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Inductance

Magnetic flux density

Potential difference

Electric field intensity

The rms value of emf in a circuit is given by a factor of.

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0.637

0.7

0.707

1.11

The susceptibility of a paramagnetic material is

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negative

Positive

Zero

Infinity

An electric lamp use energy at the rate of 46 W on a 12 V supply. How much charge passes through the lamp in 2s.

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0.15 C

0.50 C

2.0 C

8.0 C

The resistance of a capacitor when it is connected with a battery is.

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Zero

Finite

Infinite

The same

A gallium atom is.

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Monvalent

Diavalent

Trivalent

Pentavalent

What happens to the energy of a charged condenser is plate separation is increased.

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It decreases

It increases

It becomes zero

It remains unchanged

The property of an object that causes it to create a magnetic field in opposition to an externally applied magnetic field is.

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Paramagnetism

Diamagnetism

Ferromagnetism

Demagnetism

If a resistance is connected in parallel with a galvanometer the resulting instrument is called.

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A voltmeter

An ammeter

A wattmeter

A potentiometer

Which of these is not a method of charging.

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Friction or rubbing

Induction

Contact or touching

Convection

A diode cn be used as

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Amplifier

Rectifier

Oscillator

Transistor

Which part of a simple D.C. motor reverses the direction of current through the coil every half cycle.

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the armature

The commutator

the brushes

The slip rings

The cathode ray oscilloscope is used

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For viewing the wave shape of rapidly changing electric current

As voltmeter

For measuring time intervals between electricalimpulses

All of the above

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