Question

$C$ is an uncharged capacitor (shown in the circuit above). At $t=0$ the switch $\left(SW1\right)$ is closed, and $C$ begins to charge
What does graph D show?

• A. The value of the current in the circuit as time passes
• B. The value of the voltage across the terminals as time passes
• C. The total value of capacitance as time passes
• D. The voltage across resistor R
• E. None of the above

Answer 1

The correct option is A The value of the current in the circuit as time passes

When just switch is closed, the current will flow through the circuit. When time passes, the capacitor will charge and the current will decay exponentially. When the capacitor is fully charged, it blocks the current flow as its a open circuit. Thus, graph D will show the current decay with time. So , option A will correct.