You decide to use a metal ring as an indicator of induced current. If there is a current, the ring will feel warm in your hand You place the ring around a solenoid as shown in Figure P21.2, position I. Will the ring feel warm if the solenoid is connected to (a) a DC power supply or (b) an AC power supply? (c) Answer questions (a) and (b) for the case when the ring is parallel to the solenoid (position II). Explain your answers.
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