A rectangular coil of 20 turns has area 25 cm² and resistance 100 Ω. A uniform magnetic field perpendicular to the coil changes at 1000 T/s. Find the induced current.
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A rectangular coil of 20 turns has area 25 cm² and resistance 100 Ω. A uniform magnetic field perpendicular to the coil changes at 1000 T/s. Find the induced current.

G1 Physics · Accepted Answer

Step 1: Coil has N = 20 turns, area A = 25 cm² = 25 × 10⁻⁴ m², resistance R = 100 Ω. Step 2: Flux changes at rate dB/dt = 1000 T/s; average induced emf |ε| = NA(dB/dt). Step 3: |ε| = 20 × 25 × 10⁻⁴ × 1000 = 50 V; current I = ε/R = 50/100 = 0.5 A. Answer C. Final answer: (C) 0.5 A.