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What is the radius of a tightly wound solenoid of circular cross-section that has 170 tusifa change in its internal magnetic field of 40T/s causes a 70 A current to flow/ The restance of the circuit that contains the solenoid is 150. The only emf source for the circuit is the induced eml.

a) 0.22 m

b) 0.059 m

c) 0.015 m

d) 0.79 m

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