Physics-
General
Easy
Question
Two wires A and B are of lengths 40cm and 30cm. A is bent into a circle of radius r and B into an arc of radius r. A current 
is passed through A and 
through B. To have the same magnetic inductions at the centre, the ratio of 
is
- 3:4
- 3:5
- 2:3
- 4:3
The correct answer is: 3:4
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