← Topic 19

Structured practice

Attempt each visible question, then reveal the complete solution.

QUESTION 1

Capacitance

A capacitor stores 4.8 mC at 12 V. Find C.

QUESTION 2

Plate geometry

Explain two ways to increase parallel-plate capacitance.

QUESTION 3

Parallel network

Find C for 4.0 μF and 8.0 μF in parallel.

QUESTION 4

Series network

Find C for 4.0 μF and 12.0 μF in series.

QUESTION 5

Energy

A 100 μF capacitor is charged to 20 V. Find energy.

QUESTION 6

Discharge

V₀=15 V, R=20 kΩ and C=100 μF. Find V after 4.0 s.

QUESTION 7

Time constant

State charging and discharging values after one time constant.