Figure 30-78 shows a wire that has been bent into a circular arc of radius r = 24.0 cm, centered at O.A straight wire OP can be rotated about O and makes sliding contact with the arc at P. Another straight wire OQ completes the conducting loop. The three wires have cross-sectional area 1.20 mm2 and resistivity 1.70 x 10-8 Ω ˆ™ m, and the apparatus lies in a uniform magnetic field of magnitude B = 0.150 T directed out of the figure. Wire OP begins from rest at angle θ = 0 and has constant angular acceleration of 12 rad/s2. As functions of θ (in rad), find?
(a) The loop's resistance
(b) The magnetic flux through the loop.
(c) For what u is the induced current maximum
(d) What is that maximum?

Transcribed Image Text:

"Q