An electromagnet has a lifting force of 36 N. If the current through the coil is halved and the number of coils is tripled, the lifting force will become a) 54 N b) 216 N c) 24 N d) 36 N e) 108N
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An
a) 54 N
b) 216 N
c) 24 N
d) 36 N
e) 108N
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