Question # 1

High frequency radio wave is called

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Fluctuate wave

Carrier wave

Matre wave

Energetic wave

Two wires P and Q each of same length and the same material are connected in parallel to a battery The diameter of P is half that of Q What fraction of the total current passes through P.

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0.02

0.25

0.33

0.50

When 5 C of charge flows through a particular resistor 10 J of energy is converted What is the p.d. across the resistor.

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0.5 V

2.0 V

15 V

50 V

Current per unit area is called.

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Electric potential

Current density

Charge density

Electric intensity

Capacitive reactance is measured in

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Henrys

Ohms

mhos

electron volts

The output of a generator which uses a split ring commutator is.

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sinusoidal A.C. wave

Pulsating D.C. wave

Constant D.C Voltage

Linerly increasing voltage.

In a parallel resonant circuit, at resonance

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Current is maximum

Voltage is maximum

Impedance is minimum

Impedance is zero

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

A current carrying loop lying-in a magnetic field behaves lime a.

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Magnetics pole

Magnetic material

Magnetic dipole

Horse shoe magnet

On which of the following parameters the amount of charge that can be placed on a conductor does not depend on.

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Its capacitance

Its size or shape

its potential

Dielectric strength of the surrounding medium

A single silicon photovoltaic cell produces a voltage of the order of.

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0.3 V

0.6 V

0.9 V

1.2 V

in the region where the field lines are parallel and equally spaced, the field is.

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Zero

Unirorm

Non uniform

Negative

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 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

It is deduced that a piece of metal is already a magnet if

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A copper wire is attracted to it

A copper wire is repelled by it

One end of a compass is repelled by it

Both ends of a compass needle are attracted to it.

Two unchanged objects A and B are rubbed against each other, when object B is placed near a negatively charged object C the two objects repel each other Which of these statements is true abut object A.

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It remains uncharged

It becomes positively charged

It becomes negatively charged

It is unpredictable

The current passing across a p-n junction due to minority charge carriers is called

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Reverse current

Forward current

Leakage current

Both a and b

A resistor connected to a battery is heated due to current passing through it. Which of the following quantity does not change.

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Resistivity

Resistance

Number of free electrons

Drift velocity

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

If work must be done by an outside agent attempting tobring two point charges close together.

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They are of opposite signs

The field is not conservative

The work is recoverable when they separate

The P.E. of the charges is reduced by the amount of the work done

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

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