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Three identical long solenoid P,Q and R ...

Three identical long solenoid P,Q and R are connected to each other as shown in fig. If the magnetic field at the centre of P is 2.0T, what would be the field (inT) at the centre of Q? Assume that the field due to any solenoid is confined within the volume of that solenoid only.

Text Solution

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The correct Answer is:
`(1)`
(1) As the solenoids are identical , the currents in Q and R will be
the same and will be half the current in P. The magnetic field
within a solenoid is given by `B=mu_0ni`. Hence the field in Q will
be equal to the field in R and will be half the field in P, i.e., 1.0T.
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