Electrical energy - JSS3 Basic science Past Questions and Answers (page 1)

1

In which direction do electrons flow in a circuit?

A

From positive to negative

B

From negative to positive

C

They do not flow

D

Both directions simultaneously

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2

What drives the flow of electrons in a circuit?

A

Magnetic field

B

Magnetic field

C

Gravitational force

D

Friction

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3

In a series circuit, how many paths exist for the current to flow?

A

One

B

Two

C

Three or more

D

It depends

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4

What happens if one component fails in a series circuit?

A

Current continues to flow normally

B

The circuit is broken, and no current can flow

C

Voltage increases

D

Resistance decreases

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5

In a parallel circuit, how many paths exist for the current to flow?

A

One

B

Two

C

Three or more

D

It depends

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6

What happens if one component fails in a parallel circuit?

A

Current continues to flow normally

B

The circuit is broken, and no current can flow

C

Voltage increases

D

Resistance decreases

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7

How is total resistance calculated in a series circuit?

A

By multiplying individual resistances

B

By adding individual resistances

C

By dividing individual resistances

D

By subtracting individual resistances

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8

How is total resistance calculated in a parallel circuit?

A

By multiplying individual resistances

B

By adding individual resistances

C

By dividing individual resistances

D

By subtracting individual resistances

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9

Which type of circuit offers redundancy, allowing continued operation if one component fails?

A

Series circuit

B

Parallel circuit

C

Both

D

Neither

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10

Which type of circuit has a total resistance equal to the sum of the individual resistances?

A

Series circuit

B

Parallel circuit

C

Both

D

Neither

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Electrical energy - JSS3 Basic science Past Questions and Answers - page 1