Question Detail

PHY 102 Test Compilation PHY 102 5 Objective Question
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Question

Best way to demagnetise a magnetised steel needle?
Options
A break it into two
B make red hot then cool
C leave in solenoid with DC
D slowly pull out of solenoid with AC
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

AC demagnetisation: slowly remove from AC field randomises domains.

Hint

AC with slow withdrawal.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 5
Type: Objective
Difficulty: Not specified
Question 416 of 1819
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