CIE iGCSE Co-Ordinated Science P4.5.1 Electromagnetic induction Exam Style Questions Paper 1
Question
A current-carrying wire passes through a flat card.
The arrow on the wire shows the direction of the current.
Which diagram shows the pattern of the magnetic field on the card and the direction of the magnetic field lines?
▶️Answer/Explanation
Ans: D
Question
The diagram shows an electromagnet.
Which metal is used for the core of the electromagnet and why?
▶️Answer/Explanation
Answer: B
Explanation: Iron is used as the core of an electromagnet because it is easily magnetised and demagnetised, making it ideal for creating temporary magnetic fields.
Question
Which statement about the core of an electromagnet is correct?
A. It is made of soft iron because soft iron is easy to magnetise.
B. It is made of soft iron because soft iron does not lose its magnetism easily.
C. It is made of steel because steel is easy to magnetise.
D. It is made of steel because steel loses its magnetism easily.
▶️Answer/Explanation
Answer: A
Explanation: Soft iron is used in the core of an electromagnet because it is easy to magnetise and demagnetise, making it ideal for temporary magnets.