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Question (1)

QN0029693

A student connects an LED in reverse direction in a simple circuit containing a cell and switch. What will most likely happen when the switch is turned ON?

(A) LED glows brightly
(B) LED glows dimly
(C) LED does not glow
(D) Cell gets heated immediately

Correct Answer: C

Explanation:

LED allows current to pass only in one direction.

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Question (2)

QN0029694

A battery is made using four cells connected in series. How many positive terminals and free negative terminals will the battery finally have?

(A) 4 positive and 4 negative
(B) 2 positive and 2 negative
(C) 1 positive and 1 negative
(D) 4 positive and 1 negative

Correct Answer: C

Explanation:

A battery formed by series connection has one free positive and one free negative terminal.

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Question (3)

QN0029695

Which of the following materials can complete an electric circuit successfully?

(A) Chalk
(B) Rubber band
(C) Aluminium strip
(D) Plastic scale

Correct Answer: C

Explanation:

Aluminium is a conductor of electricity.

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Question (4)

QN0029696

A student makes a circuit using a cell, bulb, wires and switch. The bulb does not glow even though the switch is ON. Which could be the most probable reason?

(A) Bulb filament is broken
(B) Cell has two terminals
(C) Wires are metallic
(D) Switch is connected properly

Correct Answer: A

Explanation:

A broken filament prevents current flow through the bulb.

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Question (5)

QN0029697

Which component is mainly responsible for controlling current flow in a simple electric circuit?

(A) Wire
(B) Switch
(C) Lamp
(D) Filament

Correct Answer: B

Explanation:

A switch opens or closes the circuit.

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Question (6)

QN0029698

In a circuit diagram, a switch symbol with a gap represents a/an

(A) closed circuit
(B) connected circuit
(C) open circuit
(D) battery connection

Correct Answer: C

Explanation:

A gap in the switch symbol indicates that current cannot flow.

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Question (7)

QN0029699

A student replaces the copper wire in a tester circuit with a wooden stick. What will happen?

(A) Bulb glows brightly
(B) Bulb glows dimly
(C) Bulb does not glow
(D) Bulb flickers continuously

Correct Answer: C

Explanation:

Wood is an electrical insulator.

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Question (8)

QN0029700

Why is plastic used as an outer covering in electric wires?

(A) It increases current flow
(B) It acts as a conductor
(C) It prevents electric shocks
(D) It stores electrical energy

Correct Answer: C

Explanation:

Plastic is an insulator.

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Question (9)

QN0029701

A torchlight contains three cells arranged correctly. If one cell is inserted in reverse direction, the torch will most likely

(A) glow brighter
(B) not glow
(C) produce sound
(D) heat up immediately

Correct Answer: B

Explanation:

Incorrect cell arrangement breaks proper current flow.

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Question (10)

QN0029702

Which statement correctly describes a closed electrical circuit?

(A) It has a break in the path
(B) It allows electric current to flow
(C) It contains only insulators
(D) It has no battery

Correct Answer: B

Explanation:

Current flows only in a complete circuit.

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Question (1)

A student connects an LED in reverse direction in a simple circuit containing a cell and switch. What will most likely happen when the switch is turned ON?

Explanation:

Link:

Question (2)

A battery is made using four cells connected in series. How many positive terminals and free negative terminals will the battery finally have?

Explanation:

Link:

Question (3)

Which of the following materials can complete an electric circuit successfully?

Explanation:

Link:

Question (4)

A student makes a circuit using a cell, bulb, wires and switch. The bulb does not glow even though the switch is ON. Which could be the most probable reason?

Explanation:

Link:

Question (5)

Which component is mainly responsible for controlling current flow in a simple electric circuit?

Explanation:

Link:

Question (6)

In a circuit diagram, a switch symbol with a gap represents a/an

Explanation:

Link:

Question (7)

A student replaces the copper wire in a tester circuit with a wooden stick. What will happen?

Explanation:

Link:

Question (8)

Why is plastic used as an outer covering in electric wires?

Explanation:

Link:

Question (9)

A torchlight contains three cells arranged correctly. If one cell is inserted in reverse direction, the torch will most likely

Explanation:

Link:

Question (10)

Which statement correctly describes a closed electrical circuit?

Explanation:

Link:

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