Question # 1

Materials that experience a force from stronger to weaker regions of magnetic field are called.

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Non magnetic

Paramagnetic

Ferromagnetic

Diamagnetic

Which material has the larges resistivity.

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Silver

Germinium

Amber

Sulphur

What is the effect on the product of resistivity and conductivity if the temperature of a conductor is increased.

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It decreases

It increases

It remains the same

It may increase or decrease

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

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Zero

Finite

Infinite

The same

The coulomb's law is valid for the charges which are.

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Moving and point charges

Moving and non point charges

Stationary and point charges

Stationary and large size charges

An induced emf in a coil is independent of

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Time

Resistance

the number of turns in a coil

The charge in the magnetic flux

Which of the following defines P.E. per unit charge.

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Electric current

Charges

Potential

Electric field

Coulomb's law for the electrostatic force between two electric charges resembles the

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Law of conservation of energy

Law of conservation of mass

Newton's law of gravitation

Newton's law of motion

An inductor may store energy in

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Its magnetic field

Its electric field

Its coils

A neighboring circuit

Which onw of the following is deflected by an electric field.

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Alpha particles

Gama rays

Neutrons

x rays

A dry battery can deliver 3,000 J energy to a small 2 W electric motor before the battery is exhausted for how minutes does the motor run.

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20 minutes

25 minutes

75 minutes

125 minutes

On which principle the induction coil works on.

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Self induction

Ampere's rule

Mutual induction

Gauss's law

A steel of which material should be placed between the plates of a parallel plate capacitor in order to increase its capacitance.

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tin

Iron

Copper

Mica

The magnetic flux linked with a circuit when a unit current flows through it is known as.

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Induced current

Induced emf

Coefficient of self induction of circuit

Eddy current

Which one fo the following is based on the diffraction and repulsion of electric charge.

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Capacitor motor

Transformer

Induction motor

synchronous motor

The current passing through the switch s will be

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Zero

3 A

4.5 A

10 A

Which current can pass through a capacitor continuously.

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Alternating current

Direct current

Eddy current

Pulsating current

Which two terminal passive electronic component implements electrical resistance as a circuit element.

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Capacitor

Inductor

Resistor

Transformer

At series resonance in L-C-R circuit the impedance is equal to.

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Ohmic resistance

Inductive reactance

Capacitive reactance

Inductive reactance minus capacitive reactance

The capacity of a spherical conductor is numerically equal to its.

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Surface area

Diameter

Radius

Volume

The energy supplied in charging a capacitor resides after the charging in.

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The magnetic field

The electric field

the battery

The moving conduction charges

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