Predict the polarity of the plate A of the capacitor, when a magnet is moved towards it, as shown in the figure.

Predict the polarity of the capacitor in the situation described below.

Predict the polarity of the capacitor when the two magnets are quickly moved in the direction marked by arrows.

Find the resultant capacitance of the capacitors connected as shown in the figure.

Find the area of the blades of the magnetic compass shown in the figure

Two dielectric slabs of dielectric constant K_1 and K_2 are filled in between the two plates, each of area A, of the parallel plate capacitor as shown in the figure. What will be the capacitance of the capacitor

A conductor of length l is moved perpendicular to uniform magnetic field B with velocity v as shown in the figure The e.m.f. induced across the length of the conductor is

What is a shadow? What happens when an object is moved towards source of light ?

Figure 8.6 shows a capacitor made of two circular plates each of radius 12 cm, and separated by 5.0 cm. The capacitor is being charged by an external source (not shown in the figure). The charging current is constant and equal to 0.15A. Is Kirchhoffs first rule (junction rule) valid at each plate of the capacitor? Explain. :