Two sliding contacts are connected at the center and at the edge of a metal disc with radius a = 15 cm; the circuit is closed on resistor; the total resistance is R = 8-10-20. The disk is immersed in a uniform and constant magnetic field B = 0.03 T parallel to the axis. Calculate: (1) the torque M to be applied to the disk to keep it rotating at a frequency v = 1800 rpm, B (2) the power P dissipated in the circuit under these conditions (3) the charge q which passes through the circuit in one minute. 32/71
Two sliding contacts are connected at the center and at the edge of a metal disc with radius a = 15 cm; the circuit is closed on resistor; the total resistance is R = 8-10-20. The disk is immersed in a uniform and constant magnetic field B = 0.03 T parallel to the axis. Calculate: (1) the torque M to be applied to the disk to keep it rotating at a frequency v = 1800 rpm, B (2) the power P dissipated in the circuit under these conditions (3) the charge q which passes through the circuit in one minute. 32/71
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Transcribed Image Text:Two sliding contacts are connected at the center and at the edge
of a metal disc with radius a = 15 cm; the circuit is closed on a
resistor; the total resistance is R = 8.10-2. The disk is immersed
in a uniform and constant magnetic field B = 0.03 T parallel to the
axis.
Calculate:
(1) the torque M to be applied to the
disk to keep it rotating at a frequency
v = 1800 rpm,
B
(2) the power P dissipated in the circuit
under these conditions
(3) the charge q which passes through
the circuit in one minute.
32/71
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