Question1a solenoidal coil with 26 turns of wire is wound, Ask an Expert

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Question1

A solenoidal coil with 26 turns of wire is wound strongly around another coil with 330 turns. The inner solenoid is 23.0cm long and has a diameter of 2.30cm. At a certain time, the current in inner solenoid is 0.130A and is increasing at a rate of 1700A/s.

Question2

An iron rod and a zinc rod have lengths of 25.55 cm and 25.50 cm, respectively at 0 degree Celsius. At what temperature will the rods have the similar length? The coefficient of expansion of iron and zinc are 0.000010 and 0.000030 per degree celsius, correspondingly.

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