Question

The figure shows a 22-cm-diameter loop in three different magnetic fields. The loop's resistance is 0.19 ohm. In (Figure 1), what are the size and direction of the induced current? Express your answer to two significant figures and include the appropriate units. The loop current direction is cw. There is no induced current. The loop current direction is cow.

Answer 1

The induced emf = -ΔB/Δt*A

ΔB/Δ = 0.5 T/s

A = πr^2

emf = 0.5 x π x 0.11^2 = 0.019 V

i = V/R

i = (0.019) / 0.19Ω

i = 0.1 A .......the direction is clockwise