Question

Statement I: The poles of an electromagnet are not affected by changing the direction of the current in the coil.
Statement II: Electromagnets cannot be made more powerful than ordinary bar magnets.

• A.
  Statement I is correct and statement II is incorrect.
• B. Statement I is incorrect and statement II is correct.
• C.
  Both the statements are correct.
• D.
  Both the statements are incorrect.

Answer 1

The correct option is D

Both the statements are incorrect.
Electromagnets can be made more powerful than ordinary bar magnets. The strength of an electromagnet depends on:
1. the core material,
2. the number of turns in the coil, and
3. the intensity of the current.

The poles of an electromagnet depend upon the direction of current flowing through a circuit. The polarity of an electromagnet can be reversed by reversing the flow of current through the coil.