In figure In which region or regions of the figure could the electric field be zero nearA, nearB, near C or nowhere. Justify your answer.

Fig. shows the electric field lines arround three point charges A, B and C. In which region or regions of the picture could the electric field be zero? Justify your answer.

An electron and a proton are freely situated in an electric field. Will the electric force on them be equal? Will their acceleration be equal ? Justify your answer.

A point charge q is moving with speed v perpendicular to magnetic field B as shown in figure. Explain what should be the magnitude and direction of the applied electric filed so that the net force acting on the charge is zero.

It is established that an electric current through a metallic conductor produces a magnetic field around it. It there a similar magnetic field produced around a thin beam of moving alpha particles? Justify your answer.

It is established that an electric current through a metallic conductor produces a magnetic field around it. It there a similar magnetic field produced around a thin beam of moving neutrons? Justify your answer.

Following are two statements about the relationship between the electric field an electric potential. If the electric potential is constant in a region, then the electric field is zero in that region. Giving example, predict whether these statements are correct or false.

Is the electrostatic potential necessarily zero at a point where the electric field strength is zero? Give an example to illustrate your answer.

As shown in figure an electric lamp having coil of negligible inductance conneted in series with a capacitor and an a.c. source is glowing certain brightness. How does the brightness of the lamp change on reducing the capacitance. Justify your answer.

As shown in figure an electric lamp having coil of negligible inductance conneted in series with a capacitor and an a.c. source is glowing certain brightness. How does the brightness of the lamp change on reducing the frequency. justify your answer.

The figure shows the stopping potential for the phototelectron versus (1/lambda) graph for two metals A and B, lambda being the wavelength of incident light If the distance between the light source and the surface of metal A is increased, how will the stopping potentail for the electrons emitted from it be affected? justify your answer.