Question # 1

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

If the output voltage is not smooth but pulsating then it can be made smooth by using a circuit known as.

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Filter

Gate

shunt

Fuse

The SI unit of magnetic flux is.

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N A-1

N m-1 A

N m A-1

N m-1 A-1

Work can be stored in an inductor as.

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Elastic P.E.

Electrical P;E.

Gravitational energy

K.E.

A device which converts electrical energy into mechanical energy is called.

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A.C generator

D.C. generator

Motor

Commutator

What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added.

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Increases

Decreases

Remains the same

Cannot be predicted

Inductance are measured in

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Coulombs

Volts

Henrys

Farads

Current per unit area is called.

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Electric potential

Current density

Charge density

Electric intensity

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

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Alpha particles

Electrons

Protons

X rays

Lagging of magnetic flux density behind magnetic field is known as.

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Permeability

Susceptibility

Hysteresis

Uncertainty

One Tesla is equal to.

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1 N A-1

1 N m-1

1 N A -1 m

1 N A -1 m-1

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

The advantage of LEDs over filament lamp is their

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Small size

Reliability

High operating speed

All of the above

When a positive charge is allowed to move from positive to negative plate, then it will gain

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P.E.

K.E

Gravitational energy

Electrical P.E.

The effective resistance offered by the resistance capacitance and inductance in an A.C. circuit is known as

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Impedance

Resistance

Capacitance

Reactance

Which of the following is not a ferromagnetic materials.

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Iron

steel

Copper

Cobalt

Why are charged capacitors dangerous.

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They can leak a harmful chemicals

They can cause loss of vision

They can release a lethal charge

They can release gama rays.

The patch followed by charge in an electric field is.

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Circular

LInear

Parabolic

Zig zag

Which of the following is an example of diamagnetic substances.

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Nickel

Chromium

Antimony

Cobalt

Which onw of the following is deflected by an electric field.

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Alpha particles

Gama rays

Neutrons

x rays

How the fuse wire in electric supply line is connected to protect the electrical appliances.

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In parallel

In sereis

In mixed order

In vertical position

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