cse • paper_1 • electrodynamicscse-2011-subject-03-006
Electrostatics and Magnetostatics — UPSC CSE 2011 Physics PYQ
Buy PYQ Solution Manual →A long solenoid has 220 turns /cm; its diameter is 3.2 cm. Inside the solenoid at its centre, we place a 130-turn closepacked coil of diameter 2.1 cm along its axis. The current in the solenoid is increased from zero to 1.5 amperes at a steady rate over a period of 0.16 second. What is the magnitude of the induced e.m.f. that appears in the central coil when the current in the solenoid is being changed?
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