### What colour emerges from coated spotlight

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Q1. A flat circular coil with 155 turns, a radius of 2.54 x 10-2 m, and a resistance of 0.457 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/Δt = 0.657 T/s, thereby inducing a current in the coil. Find the magnitude of the magnetic field at center of the coil that is produced by an induced current.

Q2. A spotlight is coated so that it won't transmit magenta light from its white-hot filament. What colour emerges from coated spotlight?

What if the spotlight was coated so that it won't transmit magenta light from its white-hot filament? What colour emerges from coated spotlight?

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