Question 17 – Capacitors - OCR A A Level Physics Questions

The graph shows the variation of the charge $Q$ on the positive plate of the capacitor with time $t$ .

$Graph of Charge Q on the positive plate of a capacitor against time t for two cycles. The vertical axis is Charge Q in microcoulombs (\mu\text{C}) from 0 to 10.0, with divisions every 0.2 \mu\text{C} and major grid lines every 2.0 \mu\text{C}. The horizontal axis is time t in milliseconds (ms) from 0 to 100, with divisions every 1 ms and major grid lines every 10 ms. The curve starts at (0, 1.7 \mu\text{C}), rises as a curve with decreasing gradient (charging) to a peak of (25 ms, 9.0 \mu\text{C}). It then falls as an exponential decay curve (discharging) from (25 ms, 9.0 \mu\text{C}) to a low of (50 ms, 1.7 \mu\text{C}). It passes through the coordinate points (30 ms, 6.5 \mu\text{C}), (40 ms, 3.3 \mu\text{C}), and (50 ms, 1.7 \mu\text{C}). The cycle repeats starting from (50 ms, 1.7 \mu\text{C}), rising to (75 ms, 9.0 \mu\text{C}) and decaying back to (100 ms, 1.7 \mu\text{C}), passing through (90 ms, 3.3 \mu\text{C}).$

Create a calculation using the discharging section from $25\text{ ms}$ to $50\text{ ms}$ to determine the time constant of this circuit in $ms\text{ms}$ .

The graph shows the variation of the charge $Q$ on the positive plate of the capacitor with time $t$ .

Create a calculation using the discharging section from $25\text{ ms}$ to $50\text{ ms}$ to determine the time constant of this circuit in $ms\text{ms}$ .

Capacitors

Question 16

Capacitors

Question 16

Capacitors

Question 16

Capacitors Questions

Capacitors

Question 16

Capacitors Questions