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Question (21)

QN0091

A circuit diagram shows one long line and one short line repeatedly. This indicates the presence of

(A) switches
(B) wires
(C) batteries
(D) LEDs

Correct Answer: C

Explanation:

Repeated long and short lines represent batteries.

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Question (22)

QN0092

Why is a circuit diagram preferred over drawing actual components?

(A) It uses more paper
(B) It is simpler and quicker to draw
(C) It prevents current flow
(D) It increases resistance

Correct Answer: B

Explanation:

Circuit diagrams are easier and quicker to draw.

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Question (23)

QN0093

Which feature distinguishes the LED symbol from the lamp symbol?

(A) Parallel lines
(B) Two outward arrows
(C) Circle with cross
(D) Straight line

Correct Answer: B

Explanation:

Outward arrows show emission of light from LED.

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Question (24)

QN0094

A student accidentally uses the OFF switch symbol while drawing a working circuit. What does this indicate?

(A) The circuit is complete
(B) Current can flow
(C) The circuit is open
(D) The lamp is glowing

Correct Answer: C

Explanation:

OFF switch symbol represents an open circuit.

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Question (25)

QN0095

In a correctly drawn circuit diagram, wires are usually represented by

(A) curved arrows
(B) dotted circles
(C) straight lines
(D) triangles

Correct Answer: C

Explanation:

Straight lines are used for wires.

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Question (26)

QN0096

Which pair of symbols together can represent a simple torch circuit?

(A) Battery and wire only
(B) Lamp and switch only
(C) Battery, switch, lamp, and wire
(D) LED and resistor only

Correct Answer: C

Explanation:

A torch circuit needs battery, switch, lamp, and wire.

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Question (27)

QN0097

A student observes arrows pointing outward from an electrical symbol in a circuit diagram. Which component is represented?

(A) Cell
(B) LED
(C) Switch
(D) Wire

Correct Answer: B

Explanation:

Outward arrows indicate an LED.

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Question (28)

QN0098

If a circuit diagram shows a switch in ON position, the current path is

(A) incomplete
(B) broken
(C) complete
(D) disconnected from battery

Correct Answer: C

Explanation:

ON switch means the circuit is complete.

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Question (29)

QN0099

In a circuit diagram, what does the repeated use of standard symbols mainly ensure?

(A) Increased power generation
(B) Uniform understanding everywhere
(C) Faster battery charging
(D) Lower electricity use

Correct Answer: B

Explanation:

Standard symbols create universal understanding.

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Question (30)

QN00100

A student wants to draw a diagram of a circuit containing an LED and a battery. Which additional component is necessary to complete the circuit diagram?

(A) Wire
(B) Paper clip
(C) Plastic sheet
(D) Wooden stick

Correct Answer: A

Explanation:

Wires are needed to complete the circuit path.

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Question (21)

A circuit diagram shows one long line and one short line repeatedly. This indicates the presence of

Explanation:

Link:

Question (22)

Why is a circuit diagram preferred over drawing actual components?

Explanation:

Link:

Question (23)

Which feature distinguishes the LED symbol from the lamp symbol?

Explanation:

Link:

Question (24)

A student accidentally uses the OFF switch symbol while drawing a working circuit. What does this indicate?

Explanation:

Link:

Question (25)

In a correctly drawn circuit diagram, wires are usually represented by

Explanation:

Link:

Question (26)

Which pair of symbols together can represent a simple torch circuit?

Explanation:

Link:

Question (27)

A student observes arrows pointing outward from an electrical symbol in a circuit diagram. Which component is represented?

Explanation:

Link:

Question (28)

If a circuit diagram shows a switch in ON position, the current path is

Explanation:

Link:

Question (29)

In a circuit diagram, what does the repeated use of standard symbols mainly ensure?

Explanation:

Link:

Question (30)

A student wants to draw a diagram of a circuit containing an LED and a battery. Which additional component is necessary to complete the circuit diagram?

Explanation:

Link:

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