Question

A metal rod of length 2 m is rotating with an angular velocity of 100 rad/sec in a plane perpendicular to a uniform magnetic field of 0.3 T. The potential difference between the ends of the rod is

• A. 30 V
• B. 40 V
• C. 60 V
• D. 600 V

Answer 1

Answer: (C)

60 V

Answer 2

$e = \frac{1}{2}Bl^{2}\omega = \frac{1}{2} \times 0.3 \times (2)^{2} \times 100 = 60V$