Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectric Current in Conductors
Determine the potential difference between points A and B , and between points B and C , for the circuit shown in the figure in steady state.
Options
- A25 V and 75 V
- B50 V and 50 V
- C20 V and 80 V
- D75 V and 25 V
Correct answer
A. 25 V and 75 V
Step-by-step solution
In steady state, the capacitors are fully charged and act as open circuits. Therefore, no direct current flows through the circuit ( I = 0 ). Since the current is zero, there is no voltage drop across the 20 and 10 resistors. The potential difference across the capacitor network, between points A and C, is equal to the electromotive force of the battery: V_A - V_C = 100 V Let us analyze the connections of the capacitors in the network. The left vertical wire is entirely at potential V_A , and the right vertical wir