KVPY2020PhysicsElectromagnetic Waves
Imagine a world where free magnetic charges exist. In this world, a circuit is made with a U shape wire and a rod free to slide on it. A current carried by free magnetic charges can flow in the circuit. When the circuit is placed in a uniform electric field, E perpendicular to the plane (inward) of the circuit and the rod is pulled to the right with a constant speed v , the "magnetic EMF" in the current and the direc
Options
- Av E l clockwise
- Bv E L counterclockwise
- Cv E l c 2 clockwise.
- Dv E l c 2 counterclockwise
Correct answer
D. v E l c 2 counterclockwise
Step-by-step solution
∮ B → · d ℓ → = μ 0 I + ε 0 d ϕ E d t d ϕ E d t = v E ℓ ∴ ∮ B → · d ℓ → = μ 0 ε 0 v E ℓ ⇒ v E ℓ C 2 Direction of electric field is not given in the question therefore both options are possible.