Which of the following is true about electromagnet? *
a. An electromagnet can be made stronger by using less coil of wire
b. An electromagnet may be produced by making electricity flow through coil of wire wound in iron nail
c. Number of dry cells used affects magnetism of an electromagnet. More dry cell means less magnetism
d. Electromagnets are permanent magnets that can attract any metal or magnetic material
Answers & Comments
Answer:
b. An electromagnet may be produced by making electricity flow through coil of wire wound in iron nail.
Explanation:
#CarryOnLearning
Answer:
C. Electromagnets. are permanent magnets that can attact any metal or magnetic material
Explanation:
#hope it helps