Electric magnet is used in cranes because
A. it is small
B. it is strong
C. it has permanent magnetism
D. it has temporary magnetism
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electric magnet is used in crane because
b. it is strong
a large industrial cranes extremely strong electromagnet are used to lift heavy objects of the ground and transport them from one place to anotherthe magnetic force of the electromagnet can be controlled by switching the current that flows through them on and off
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