Aplanar capacitor has two circular plates with equal radii r separated by a distance h. a dielectric cylinder of a smaller radius . < r is inserted co-axially into the center of the capacitor. the dielectric permittivity of the cylinder is є. the voltage between the plates is linearly increased according to v-at. (a) calculate the magnetic field at the edge of the cylinder. (b) calculate the magnetic field at the edge of the capacitor.

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

because if the tool that you are using is not balanced it there would be false mass.