A metallic conductor of irregular crosssection is as shown in the Fig. A constant potential difference is applied across the ends (1) and (2). Then:
(A) the current at the cross-section P equals the current at cross-section Q
(B) the electric field intensity at P is less than that at Q.
(C) the rate of heat generated per unit time at Q is greater that at P
(D) the number of electrons crossing per unit area of cross-section at P is less than that at Q.
