A conducting rod of length l rotates about one of its ends in a uniform magnetic field \(\vec{B}\) with a constant angular speed ω. If the plane of rotation is perpendicular to \(\vec{B}\), the emf induced between the ends of the rod is
A. \(\frac{1}{2}\)Bωl2
B. πl2Bω
C. Bωl2
D. 2Bωl2.
Answer:A
A conducting rod of length l rotates about one of its ends in a uniform magnetic field \(\vec{B}\) with a constant angular speed ω. If the plane of rotation is perpendicular to \(\vec{B}\), the emf induced between the ends of the rod is
A. \(\frac{1}{2}\)Bωl2 B. πl2Bω C. Bωl2 D. 2Bωl2.