Question # 1

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 long distance transmission of electrical energy is done at.

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High potential and low current

High potential and highs current

Low potential and high current

Low potential and low current

Tesla is the unit for measuirng

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Magnetic intensity

Magnetic induction

Magnetic moment

Electric potential

An ideal voltage source has zero.

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Current

Electromotive force

Voltage

Internal resistance

A 800 W toaster and a 1.3 kW frying pan are plugged into the same 120 V lines, then

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Fuse will not blow

Fuse will blow

Supply will spark

Only toaster can work

The electric field intensity of a point charge varies.

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Directly as the square of the distance from the charge

Directly as the square of the charge

Inversely as teh distance from the charge.

Inversely as the square of the distance from the charge

The capacitance of a capacitor increases with a decreases in.

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Plate area

Permitivity

Plate separation

Dielectric constant

The magnetic induction is also called the

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Magnetic intensity

Magnetic flux

Magnetic flux density

Magnetic magnetization

When two point charges of equal magnitude and opposite sign exist very close to one another the arrangement is called.

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An electric dipole

An amperian current

A null charge

A neutral source

Which of the following statemtents is worng.

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Charge is quantized

Charge is conserved

There is not field near an isolated charge at rest

A moving charge produces both electric and magnetic field.

Which of the given factors is increased in a step down transformer.

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Voltage

Current

Wattage

Resistance

Faraday's law deals with

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Induced emf

Motional emf

Induced current

Electric current

One volt is equal to.

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One joule per coulomb

One dyne per coulomb

One newton per coulomb

One watt second

The current passing through the coil of a galvanometer is directly proportional to

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Resistance

voltage

Angle of deflection

conductance

Which one of the following instruments has the maximum resistance.

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Ammeter

Voltmeter

Micro ammeter

Milli ammeter

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

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Electrical impedance

Capacitance

Inductance

Admittance

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

at room temperature the p.d. between the two sides of depletion region for silicon is of the order of.

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0.3 V

0.5 V

0.7 V

0.9 V

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

Which one of the following is diamagnetic

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Air

Water

Copper sulphate

Liquid oxygen

The thermionic current increases when

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Area of filament is decreased

Area of filament is increased

Temperature is decreased

Work function is increased

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