Question

1. Name the physical quantity which has its unit joule, coulomb^-1 Is it a vector or a scalar?

2. Two plane sheets of charge densities +σ and -σ are kept in air as shown in figure. What are the electric field intensities at point A and B?

Answer 1

1. Electric potetial Scalar.

2. Electric field at A E_A = 0

Electric field at E_B = \(\frac{\sigma}{\varepsilon_0}\).