P and Q are two unlike magnetic poles. I...

`P` and `Q` are two unlike magnetic poles. Induction due to `'P'` at the location of `'Q'` is `B`, and induction due to `'Q'` at the location of `P` is `B//2`. The ration of strength of `P` and `Q` is

`1:1`

`1:2`

`2:1`

`1:sqrt2`

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The correct Answer is:

`Bpropm`

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