At a certain current, the energy stored in iron cored coil is 1000 J and its copper loss is 2000 W. The time constant (in seconds) of the coil is_____

At a certain current, the energy stored in iron cored coil is 1000 J a

1.	At a certain current, the energy stored in iron cored coil is 1000 J and its copper loss is 2000 W. The time constant (in seconds) of the coil is_____
A.	0
B.	1
C.	2
D.	3
Answer» C. 2

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At a certain current, the energy stored in iron cored coil is 1000 J and its copper loss is 2000 W. The time constant (in seconds) of the coil is_____

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