Question

Two resistors and a capacitor are connected with a 10 volt battery, a switch and an ideal ammeter to form the simple electrical circuit shown. After the switch is closed and the current in the circuit reaches a constant value, what is the reading on the ammeter in the circuit?

(A) 9.2 × 10^–2 A 

(B) 8.1 × 10^–2A 

(C) 7.5 × 10^–2A 

(D) 6.9 × 10^–2A 

(E) zero

Answer 1

The correct option is: (C) 7.5 × 10^–2A 

Explanation:

When the capacitor is charged, the branch is effectively removed from the circuit, making it a simple parallel circuit. The total resistance is 133.3 Ω and V = IR.