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Question 1

A student connects four different copper wires, $W$ , $X$ , $Y$ , and $Z$ , in series in a complete circuit. The maximum safe current ratings of these wires are:

Wire $W$ : 3 A
Wire $X$ : 8 A
Wire $Y$ : 15 A
Wire $Z$ : 25 A

If the current in the circuit is gradually increased, which wire is most likely to overheat first?

Wire $W$

Wire $X$

Wire $Y$

Wire $Z$

Markscheme

Electrical safety Questions

IGCSE
Physics
Electrical safety

135 exam-style questions on CIE IGCSE Physics Electrical safety, covering Electrical safety. Each one has a worked solution and a mark scheme showing where the marks go.

Electrical safety

Question bank

Electrical safety

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Question 1

A student connects four different copper wires, $W$ , $X$ , $Y$ , and $Z$ , in series in a complete circuit. The maximum safe current ratings of these wires are:

Wire $W$ : 3 A
Wire $X$ : 8 A
Wire $Y$ : 15 A
Wire $Z$ : 25 A

If the current in the circuit is gradually increased, which wire is most likely to overheat first?

Wire $W$

Wire $X$

Wire $Y$

Wire $Z$

Markscheme

Electrical safety Questions

IGCSE
Physics
Electrical safety

135 exam-style questions on CIE IGCSE Physics Electrical safety, covering Electrical safety. Each one has a worked solution and a mark scheme showing where the marks go.