Question # 1

An electric motor could be used as a

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Battery

Capacitor

Dynamic

Transofrmer

A heat sensitive resistor is called.

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Thermistor

Varibale resistor

Fixed resistor

Zero resistor

What is the smalless total resistance using only a 6 ohm and 12 ohm resistors.

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2 Ohm

3 Ohm

4 Ohm

6 Ohm

What is measured by the energy dissipated when a source drives a unit charge round a complete circuit.

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Electromotive force

Potential difference

Power

Resistance

Gauss's law a most useful in cases where the charge distributions.

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Are made up of discrete point charges

Are finite in their spatial extent

Give rise to inverse square law fields

Posses a certain amount of symmetry

What is the range of values of power factor.

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0 to -1

0 to +1

0 to 2

2 to 3

Which of the following is not an application of diodes.

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A filters

Bridge rectifier

Half wave rectifier

Full wave rectifier

Inserting a di electric between the plates of a charged parallel plate capacitor.

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Decrease the capacitance

Leaves teh capacitance the same

Encourages breakdown between the plates

Reduces the electric intensity between the plates

What is emitted by the hot metal filament in a cathode ray tube.

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Alpha particles

Electrons

Protons

X rays

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

The permeability of a diamagnetic material is

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Greater than unity

Less than unity

Equal to unity

Zero

The current passing through the switch s will be

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Zero

3 A

4.5 A

10 A

Artificial polymers are made by a chemical reaction known as.

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Crystallization

Electroplating

Polymerization

Polarization

Which equation in electromagnetism describe the magnetic field B generated by an electric current.

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ampere's circuital law

Bio savart law

Gauss's law for electromagnetism

Coulomb's law

The combined effect of resistance and reactance's in A.C. circuit is called.

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Resistance

Conductance

Choke

Impedance

The charge per unit volt which is a constant property of the system is known as the

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Dielectric constant

Permitivity

Capactance

Inductance

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

The resistance of a wire does not depend upon.

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Area of cross section of the wire

Length of the wire

Temperature of the wire

Current passing though the wire

Current in an electrolyte is carried by.

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Electron only

Anions only

Citations only

Mesons only

Since a diode permits the flow of current only in one direction so it can be used as.

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An oscillator

A rectifier

A phot deflector

A transistor

Which of the following a natural example of a capactor.

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Fire

Snow

Air

Lightining

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