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Figure shown variation of magnetic field...

Figure shown variation of magnetic field inside and outside two cylindrical wires P and Q carrying currents that are uniformly distributed across the cross section of wires. If current density for two wires are `J_(P)` and `J_(Q)` then

A

`J_(P) = J_(Q)`

B

`J_(P) lt J_(Q)`

C

`J_(P) gt J_(Q)`

D

can't be decided

Text Solution

Verified by Experts

The correct Answer is:
C
At the surface of a current carrying wire
`B = (1)/(2)mu_(o) Jr`
`J prop (B)/(r )`
`:.` as slope of wire `P gt` slope of wire Q
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