EMI in One Equation

Q. A vertical conducting ring of radius R falls vertically under gravity in a horizontal magnetic field of magnitude $B_0$. Direction of $B_0$ is perpendicular to the plane of ring. when speed of ring becomes $v$,

1. Points C and D are at same potential.
2. Points A and B are at same potential.
3. Time to gain speed $v$ is more than $\frac{v}{g}$
4. No current flow in ring.

Q. If I place a closed loop of wire between the North and South Poles of two magnets, if I get electricity, this means I get infinite energy forever by doing nothing. How is this violation of the law of conservation of energy possible.

1. This is an exceptional case
2. The given statement is wrong. The magnets have to be moving with respect to the coil.
3. Faraday was wrong.
4. Excess energy dissipates into the air as heat.

Q. A vertical conducting ring of radius R falls vertically under gravity in a horizontal magnetic field of magnitude $B_0$. Direction of $B_0$ is perpendicular to the plane of ring. when speed of ring becomes $v$,

1. Points C and D are at same potential.
2. Points A and B are at same potential.
3. Time to gain speed $v$ is more than $\frac{v}{g}$
4. No current flow in ring.