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The electric current in a circular coil ...

The electric current in a circular coil of two turns produced a magnetic induction of 0.2 T at its centre. The coil is unwound and then rewound into a circular coil of four turns. If same current flows in the coil, the magnetic induction at the centre of the coil now is

A

0.2

B

0.4

C

0.6

D

0.8

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The correct Answer is:
D
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TARGET PUBLICATION-MAGNETIC EFFECT OF ELECTRIC CURRENT -Critical Thinking Introduction
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  12. Two long parallel wires, separated by a distance R have equal current ...

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  13. While defining value of one ampere of steady current, which of the fol...

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  14. A horizontal conducting wire of length 0.1 m carries a current of 4A. ...

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  15. A rectangular loop is acted upon by two forces of same magnitude but o...

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