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Questions

Question (1)

QN0031

Which component acts as the portable source of electrical energy in a simple electrical circuit?

(A) Lamp
(B) Switch
(C) Electric cell
(D) Wire

Correct Answer: C

Explanation:

Electric cell provides electrical energy to the circuit.

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Question (2)

QN0032

The flat metal disc of an electric cell is its

(A) positive terminal
(B) negative terminal
(C) filament
(D) connector

Correct Answer: B

Explanation:

The flat metal disc is the negative terminal of the cell.

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Question (3)

QN0033

A combination of two or more electric cells connected together is called a

(A) conductor
(B) battery
(C) filament
(D) switch

Correct Answer: B

Explanation:

Two or more connected cells form a battery.

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Question (4)

QN0034

In a correctly connected battery, the positive terminal of one cell is connected to the ______ terminal of the next cell.

(A) positive
(B) plastic
(C) negative
(D) metallic

Correct Answer: C

Explanation:

Cells are connected positive to negative in a battery.

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Question (5)

QN0035

Why are multiple cells connected in a torchlight?

(A) To reduce current flow
(B) To provide more energy or longer usage
(C) To cool the filament
(D) To increase wire length

Correct Answer: B

Explanation:

Multiple cells provide more energy and longer operation.

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Question (6)

QN0036

In an incandescent lamp, light is produced because the filament

(A) freezes
(B) melts completely
(C) becomes hot and glows
(D) breaks instantly

Correct Answer: C

Explanation:

The filament becomes hot and glows when current passes.

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Question (7)

QN0037

Which part of an incandescent lamp forms one terminal at the centre of the base?

(A) Glass bulb
(B) Filament
(C) Metal tip
(D) Plastic cap

Correct Answer: C

Explanation:

The metal tip at the base acts as one terminal.

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Question (8)

QN0038

The two terminals of an incandescent lamp are fixed so that they

(A) touch each other
(B) remain separated
(C) melt together
(D) become longer

Correct Answer: B

Explanation:

The terminals are separated to allow proper current flow.

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Question (9)

QN0039

Which statement about LEDs is correct?

(A) LEDs contain filaments
(B) LEDs work only with AC current
(C) LEDs allow current in one direction only
(D) Both LED wires are of equal length

Correct Answer: C

Explanation:

LEDs conduct current in only one direction.

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Question (10)

QN0040

In an LED, the shorter wire represents the

(A) positive terminal
(B) negative terminal
(C) filament
(D) switch terminal

Correct Answer: B

Explanation:

The shorter wire is the negative terminal.

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