Question

44. When the switch S is open in the circuit shown above, the reading on the ammeter A is 3.0 A. When the switch is closed, the reading on the ammeter is

45. A potential difference V is maintained between two large, parallel conducting plates. An electron starts from rest on the surface of one plate and accelerates toward the other. Its speed as it reaches the second plate is proportional to

(A) 1/V

(B) 1 / √V

(C) √V

(D) V

(E)   V2