(a) Explain the terms: (i) gradient of a scalar field. (ii) divergenc…

Previous year question for Advanced Engineering Physics.

Question

(a) Explain the terms:

(i) gradient of a scalar field.

(ii) divergence of a vector field.

Discuss their physical significance giving examples. (12)

(b) A light source has a beam power of 50 gigawatts and diameter of 2 mm. Find the peak value of E and B. (8)