TRUE OR FALSE
15. The strength of electromagnets may be increased by adding the number of turns of wire coiled in the iron nail
16 Rustic iron nails are also an effective material in creating electromagnet
17 The strength of electromagnets may be decreased if new and partly used batteries were used
18. Using different sizes of nails affect the strength of an electromagnet The smaller the nail, the weaker is the magnetic force
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Answer:
15True
16.False
17.True
18.True
ANSWER
1 True
2 False
3 True
4 true