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Two wires A and B are of lengths 40cm an...

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 `i_(1)` is passed through `A` and `i_(20)` through `B`. To have the same magnetic inductions at the centre, the ratio of `i_(1):i_(2)` is

A

`3:4`

B

`3:5`

C

`2:3`

D

`4:3`

Text Solution

Verified by Experts

The correct Answer is:
A
`B_1 = B_2`
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NARAYNA-MOVING CHARGES AND MAGNETISM-EXERCISE - 2(C.W) (AMPERE.S CIRCUITAL LAW BIO-SAVART LAW AND ITS APPLICATIONS)
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  6. A current of 1A is flowing in the sides of equilateral triangle of sid...

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  7. In the given figure the magnetic induction at the point O is

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  8. Figure shows a coil of radius 2 cm concentric with a coil of radius 7c...

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  9. Two identical coils carry equal currents have a common centre and thei...

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  10. A uniform wire of resistance 12Omega is bent in the form of a square. ...

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  11. A wire of length 10cm is bent into an arc of a circle such that it sub...

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  12. A circular coil of radius 'r' having 'n' turns carries a current 'I'. ...

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  13. Two wires A and B are of lengths 40cm and 30cm. A is bent into a circl...

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  14. Two long straight conductors with corrents I(1) and I(2) are placed al...

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  15. Magnetic field induction at the center of a circular coil of radius 5c...

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  16. The magnetic induction at the centre of a current carrying circular co...

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  17. Same current i is flowing in the three infinitely long wires along pos...

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  18. Two long straight wires are connected by a circular section which has ...

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  19. If B is the magnetic induction, at the centre of a circular coil of ra...

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