Which of the following statements are not true about permanent magnets?
A. They are simple
B. They are inexpensive
C. They don’t require shielding
D. They don’t require power supply
Answer:C
Which of the following statements are not true about permanent magnets?
A. They are simple B. They are inexpensive C. They don’t require shielding D. They don’t require power supply
Explanation: Permanent magnets are simple and inexpensive. But, permanent magnets require extensive shielding.