A metallic conductor of irregular cross-section is as shown in the figure. A constant potential difference is applied across the ends (1) and (2). Then :

Select all that apply

• Option A

  the current at the cross-section P equals the current at the cross-section Q

• Option B

  the electric field intensity at P is less than that at Q.

• Option C

  the rate of heat generated per unit time at Q is greater than that at P

• Option D

  the number of electrons crossing per unit area of cross-section at P is less than that at Q.