Question

IV.Say whether the statement is correct. If incorrect give reason
15. When the current is switched on through a wire, a compars needle kept hearty
deflected from its north-south position
16. We can use an electromagnet to separate plastic bags from a garbage heap
17. An electromagnet works only in the presence of electricity.​

Answer 1

Answer:

Your answer is given below:

Explanation:

15. When a current is switched on through a wire, the wire starts behaving as a magnet. Hence, when a compass needle is placed near the given current carrying wire, it gets influenced by the magnetic effect of electric current and gets deflected from its north- south position.

16. No, electromagnets attract only magnetic substances. Plastic bags are non-magnetic in nature and are not attracted by an electromagnet. Hence, an electromagnet cannot be used for separating plastic bags from a garbage heap.

17. Electromagnet is a temporary magnet, which works only in the presence of electricity.

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