V2I
V1I
(V1+V2)I
(V1−V2)I
(V2−V1)I
Correct answer is E
On open circuit, V1 = I; On closed circuit V2 = IR + Ir
V2 = V1 + Ir
r = (V2−V1)I
Which of the following elements is the best absorber of X-rays?
hydrogen
oxygen
calcium
copper
lead
Correct answer is E
No explanation has been provided for this answer.