AIIMS2001PhysicsElectromagnetic Induction
A small piece of metal wire is dragged across the gap between the pole pieces of a magnet in 0.4 sec . If magnetic flux between the pole pieces is known to be 8 10⁻⁴ ~Wb , then induced emf in the wire, is
Options
- A4 10⁻³ ~V
- B8 10⁻³ ~V
- C2 10⁻³ ~V
- D6 10⁻³ ~V .
Correct answer
C. 2 10⁻³ ~V
Step-by-step solution
The charge of flux through the metal wire Time taken aligned & =8 10⁻⁴ ~Wb t & =0.4 sec aligned Induced emf. aligned e & = t & = 8 10⁻⁴ 0.4 & =20 10⁻³ ~V aligned