Question

A current of 1 A in the coil of an iron cored electromagnet cause a flux density of 0.2.T. If the current is 2 A, B=

a.

0.2 T

b.

0.4 T

c.

0.4 T or less

d.

0.4 T or more

Answer: (b).0.4 T

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Q. A current of 1 A in the coil of an iron cored electromagnet cause a flux density of 0.2.T. If the current is 2 A, B=

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