Question # 1

Ohm's law is applicable to

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Ohmic and non ohmic devices only

Semiconductors only

Metals only

Insulators only

The sensitivity of the galvanometer can be increased by increasing the

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Number of turns of the coil

Area of the coil

Strength of the magnetic field

All of the above

If positive terminal of the battery is connected to n-type and negative terminal of the battery is connected to p-type then the diode is.

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Saturated

A gate

Forward biased

Revere biased

Which statement is true about the Magnetic poles.

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Unlike poles repel

Like poles attract

Magnetic poles do not effect each other

A single magnetic pole does not exist

What is the effect on the product of resistivity and conductivity if the temperature of a conductor is increased.

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It decreases

It increases

It remains the same

It may increase or decrease

What is the power factor of LR circuit.

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Unity

Zero

infinity

Between 0 and 1

Which of the following is not an application of diodes.

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A filters

Bridge rectifier

Half wave rectifier

Full wave rectifier

A system of the equal and opposite point charges separated by a small distance is called.

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A capacitor

A dipole

An iinductor

A di electric

Which electrical component uses a low current circuit to switch a high current ON or OFF.

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Capacitor

Diode

Reed rely

Thermistor

When a current of 2 A flows for 5 s through a lamp 120 W of power are used How much charge flows through the lamp.

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10 C

12 C

24 C

60 C

What is the part of a simply D.C. motor that reverses the direction of current through the coil every half cycle.

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Armature

Brushes

Commutator

Slip rings

The cosine of the phase angle between the current and voltage in an A.C. circuit is called the

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Lead factor

Lag factor

Dissipation factor

Power factor

The current passing through the switch s will be

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Zero

3 A

4.5 A

10 A

Lines of force are imaginary lines drawn so as to be energy point.

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parallel to equipotential surface

Normal to the electric field

Indicative of the position of the nearest source charge

Tangent to the electric field

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

A charge less region which separates p-type and n-type semiconductors in a p-n junction is known as.

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Polar region

Null region

Depletion region

Neutral region

A torch bulb uses a 3 V supply and makes a current of 0.2 A It is switched on for one minute How much electrical energy is used.

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0.6 J

12 J

24 J

36 J

The materials whose resistivity becomes zero below a certain temperature.

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Semi conductors

Super conductors

Insulators

conductors

A capacitor is prefect insulator for

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Direct current

Alternating current

Direct as well as alternating current

Pulsating current

A substance which has empty conduction band.

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Insulator

Conductor

Semi conductor

super conductor

Force acting on a test charge between the plates of a parallel plate capacitor is F. If one of the plates is removed teh force on the same test charge will be.

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Zero

F/2

F

2 F

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