Question

Which of the following is not true about electromagnets?

• A. Uses insulated copper wire for coating
• B. The magnetic property is due to current
• C. The strength cannot be changed
• D. The polarity can be changed

Answer 1

The correct option is C

The strength cannot be changed

The strength of an electromagnet can be changed by increasing the current or using iron core. it uses an insulated copper wire to avoid the condition of short circuit.