MCQ
When a $‘J’$ shaped conducting rod is rotating in its own plane with constant angular velocity $w$, about one of its end $P$, in a uniform magnetic field $\vec B\,$ directed normally into the plane of paper) then magnitude of emf induced across it will be
- A$B\omega\, \sqrt {{L^2} + {{\text{l}}^2}} $
- B$\frac{1}{2}B\omega {L^2}$
- ✓$\frac{1}{2}B\omega ({L^2} + {{\text{l}}^2})$
- D$\frac{1}{2}B\omega {{\text{l}}^2}$
