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Questions

Question (1)

QN0071

What is a representation of an electrical circuit using symbols called?

(A) Electric map
(B) Circuit diagram
(C) Flow chart
(D) Battery chart

Correct Answer: B

Explanation:

A circuit diagram represents electrical circuits using symbols.

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Question (2)

QN0072

Why are symbols used in circuit diagrams?

(A) To decorate circuits
(B) To make drawing difficult
(C) To represent electrical components simply
(D) To increase current flow

Correct Answer: C

Explanation:

Symbols make circuits simple and easy to understand.

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Question (3)

QN0073

In the symbol of an electric cell, the longer line represents the

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

Correct Answer: B

Explanation:

The longer line indicates the positive terminal.

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Question (4)

QN0074

In the symbol of an electric cell, the shorter line represents the

(A) positive terminal
(B) battery case
(C) negative terminal
(D) switch

Correct Answer: C

Explanation:

The shorter line indicates the negative terminal.

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Question (5)

QN0075

Which symbol is used to represent a battery in a circuit diagram?

(A) One long and one short line
(B) Several pairs of long and short parallel lines
(C) A triangle with arrows
(D) A zig-zag line

Correct Answer: B

Explanation:

A battery is shown by repeated long and short lines.

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Question (6)

QN0076

Which electrical component is represented by a circle with a cross inside it?

(A) LED
(B) Electric cell
(C) Electric lamp
(D) Switch

Correct Answer: C

Explanation:

A lamp is represented by a circle with a cross.

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Question (7)

QN0077

In the symbol for an LED, the triangle indicates the

(A) battery size
(B) direction of current flow
(C) thickness of wire
(D) brightness of light

Correct Answer: B

Explanation:

The triangle shows the direction of current flow.

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Question (8)

QN0078

In the symbol for an LED, the two arrows indicate that the LED

(A) stores electricity
(B) emits light
(C) blocks current
(D) contains a filament

Correct Answer: B

Explanation:

The arrows show that the LED emits light.

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Question (9)

QN0079

Which of the following components has different symbols for ON and OFF positions?

(A) Electric cell
(B) LED
(C) Switch
(D) Battery

Correct Answer: C

Explanation:

Switch symbols differ for ON and OFF states.

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Question (10)

QN0080

A switch shown with a gap in its symbol represents the ______ position.

(A) ON
(B) closed
(C) OFF
(D) connected

Correct Answer: C

Explanation:

A gap in the switch symbol shows OFF position.

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