Find the mean amount of thermal power

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Q1. A wire shaped as a semi-circle of radius a rotates about an axis OO' with an angular velocity ω in a uniform magnetic field of induction B (Fig). The rotation axis is perpendicular to the field direction. The total resistance of the circuit is equal to R. Neglecting the magnetic field of the induced current, find the mean amount of thermal power being generated in the loop during a rotation period.

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Q2. A coil of inductance L = 300 mH and resistance R = 140 mΩ is connected to a constant voltage source. How soon will the coil current reach η = 50% of the steady-state value?

Reference no: EM132434072

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