Question # 1

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

An other name for electric P.E per unit charge is.

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Electric intensity

Electric field

Electric potential

Electric force

The circuit of full wave rectification consists of

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Only one diode

Two diodes

Three diodes

Four diodes

Positive electric charge is the type of charge found on a rod which has been rubbed with silk and which is made of.

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rubber

Glass

Steel

Cork

A plug connoted to a table lamp contains a 3 A fuse Why is the fuse needed.

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To increase the resistance of the circuit

To make it easier for the current to flow

To protect the wiring form overheating

To reduce the voltage across thelamp

In a galvanometer the enameled copper wire is wound on.

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An insulator

A non magnetic material

A magnetic material

A conductor

The potential difference between two points is equal to the difference of

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Kinetic energy

potential energy

Electric current

Charge energy

The ratio of average induced emf to the rate of changing of current in the coil is called.

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Self induction

Mutual induction

Self inductance

Mutual inductance

An Electric kettle should always be fitted with an earth connection as a protective device What is being protected by the earth connection.

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The cable connecting the kettle

The fuse in the circuit

The heating element of the kettle

The person using the kettle

A transformer is needed to convert a mains 240 V supply into a 12 V supply it there are 200 turns on the primary coil, how many turns should there be on the secondary coil.

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100

200

400

600

Which law states that an induced current is always in such a direction as to oppose the motion or change causing it.

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Ampere's law

Gauss's law

Lenz's law

Kirchoff's law

The ratio of the magnitude of charge on one of the two conductors in proximity to the potential difference between the two is called.

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Inductance

Reactance

Resistance

Capacitance

Which quantity is not affected by a magnetic field.

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Moving charge

Stationary charge

Current flowing in a conductor

Charge in magnetic flux

What for is a modulator circuit used.

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To eliminate carrier waves

To superpose the radio frequency signal on the carrier waves

To transmit the signal

To create sound waves

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

A D.C Motor converts

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Mechanical energy into electrical energy

Mechanical energy into chemical energy

Electrical energy into mechanical energy

Electrical energy into chemical energy

Which magnetic properties is inherent in all materials.

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Para magnetism

diamagnetism

Ferromagnetism

demagnetism

Magnetic fields do not interact with

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Stationary electric charges

Stationary permanent magnets

Moving electric charges

Moving permanent magnets

Which of the following is not a ferromagnetic materials.

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Iron

steel

Copper

Cobalt

The speed of the charging or discharging a capacitor depends upon the product of resistance and.

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Current

Voltage

Capacitance

Potential difference

The value of magnetic field strength for parament magnets is.

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Unity

Infinity

Zero

Two

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