Eddy Currents

Q. Induction cooker works on the principle of:

1. Magnetic Force
2. Electromagnetic Induction
3. Damped Oscillations
4. Eddy Currents

Q. A bar magnet is released into a copper tube. Mass of the magnet is $m$. After some time it gains a constant speed of $v_0$, then heat developed per second in conducting cylinder will be,

1. $mg{v}_0$
2. $\frac{3}{2}mg{v}_0$
3. $\frac{mg{v}_0}{2}$
4. zero

Q. Eddy currents are often ______ ;since, they _____ energy in the form of _____.

1. Desirable, generate, heat
2. Undesirable, dissipate, heat
3. Desirable, dissipate, heat
4. Undesirable, generate, sound