Question

A 1.4T magnet in a handcrank generator is spun at a rate of 210 rpm, or 7π rad/s inside a500 turn loop of surface area 2.10x10^-3 m. If the generator has a resistance of 5Ω, the magnitude of the maximum current generated is:

A) 0.15 A

B) 161.63 A

C) 61.74 A

D) 3.23 A

E) 6.47 A

Answer 1

for the maximum current

maximum current = maximum potential/resistance

maximum current = N * Area * w * B/(resistance)

maximum current = 500 * 2.1 *10^-3 * 7pi * 1.4/5

maximum current = 6.47 A

the maximum current is E) 6.47 A