A long solinoid has 200 turns/cm and carries a current of 1.5 amp. its diameter is 3.0 cm. At its center we place a 100-turn, close-packed coil if diameter 2.0 cm. This coil is arranged so that B at the centre of the solinoid is parallel to its axis. The current in the solinoid is reduced to zero and then raised to 1.5 amp in the other direction at a steady rate over a period of 0.050sec. What induced e.m.f appears in the coil while the current is being changed?

Subject Physics
NU Year Set: 6.(d) Marks: 6 Year: 2012
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