Question # 1

The SI unit of magnetic flux is

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gauss

Maxwell

Oersted

Water

According to Coulomb's law what happens to the attraction of two oppositely charged objects as their distance of separation increases.

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Increase

Decrease

Remain unchanged

Cannot be determined

Which of the following is not the SI unit of magnetic flux density.

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Wb m2

N A-1 m-1

Tesla

N mA-1

Which one of the following describes a measure of opposition to alternating current.

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Electrical impedance

Capacitance

Inductance

Admittance

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

Capacitive reactance is measured in

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Henrys

Ohms

mhos

electron volts

Why should the metal casing of an electrical fire be earthen.

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To complete an electrical circuit.

To prevent the fire from overheating

To reduce the risk of electric shocks

To stope the casing from getting too not to touch

If a capacitor is charged by using a 1.5 V battery, how much charge will capacitor gain.

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0 V

0.5 V

1.5 V

3 V

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

At room temperature the p.d. between the two sides of depletion region for germanium is of the order of.

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0.3 V

0.5 V

0.7 V

0.9 V

A pure choke consumes

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No power

Maximum power

Minimum power

Average power

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

The typical value of forbidden energy gap in germinium is.

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0.7 eV

1.0 eV

1.4 eV

10 eV

The magnetic force is simply a

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Reflecting force

Deflecting force

Restoring force

Gravitational force

The process of mixing sound waves with carrier waves is known as.

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Rectification

amplification

Modulation

Demodulation

A device consisting two different conductors that produce a voltage proportional to the temperature difference between either end of the pair of conductors is a.

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Thermistor

Thermocouple

Strain gauge

Potentiometer

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

For capacitors connected is series.

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The difference of potential is same for an

The charge on each is the same

The resultant capacitance is greater than

The charge on each is not the same

Electric Heater operates on the principle of.

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electromagnetism

Electromagnetic induction

Electrolysis

Momentum

If a charged body is moved against the electric field it will gain.

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P.E

K.E.

Electrical P.E.

Gravitational energy

The vertical component of earth's magnetics field is zero.

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At magnetic poles

At geographical poles

At magnetic equator

Everywhere

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