Three identical coils `A,B` and `C` carrying currents are placed co-axially with their planes parallel to one another. `A` and `C` carry current as shown in figure `B` is kept fixed while `A` and `C` both are moved towards `B` with the same speed. Initially, `B` is equally separated from `A` and `C`. The direction of the induced current in the coil `B` is A. (a) same as that in coil `A`B. (b) same as that in coil `B`C. ( c) zeroD. (d) none of these

Three identical coils `A,B` and `C` carrying currents are placed co-ax

1.	Three identical coils `A,B` and `C` carrying currents are placed co-axially with their planes parallel to one another. `A` and `C` carry current as shown in figure `B` is kept fixed while `A` and `C` both are moved towards `B` with the same speed. Initially, `B` is equally separated from `A` and `C`. The direction of the induced current in the coil `B` is A. (a) same as that in coil `A`B. (b) same as that in coil `B`C. ( c) zeroD. (d) none of these
Answer» Correct Answer - C (c ) Because `A and C` are at equal distance from `B`, and their flux across `B` is in opposite direction, so at any time flux in `B` will be zero. Hence no emf is induced.

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