David Sang and Graham Jones Solutions for Chapter: Capacitance, Exercise 4: Questions

Calculate the energy stored in the capacitor of capacitance $200 \mu \mathrm{F}$ which is charged to $230 \mathrm{V}$.

Which involves more charge, a $100\mu \mathrm{F}$ capacitor charged to $200 \mathrm{V}$ or a $200\mu \mathrm{F}$ capacitor charged to $100 \mathrm{V}$ ? Which stores more energy?

A $10000\mu \mathrm{F}$ capacitor is charged to $12 \mathrm{V}$, and then connected across a lamp rated at $12\mathrm{V},36\mathrm{W}$. Calculate the energy stored by the capacitor.

A $10000\mu \mathrm{F}$ Capacitor is charged to $12 \mathrm{V}$, and then connected across a lamp rated at $12\mathrm{V},36\mathrm{W}$. Estimate the time the lamp stays fully lit. Assume that energy is dissipated in the lamp at a steady rate.

In a simple photographic flashgun, a $0.20 \mathrm{F}$ capacitor is charged by a $9.0 \mathrm{V}$ battery. Calculate the charge on and energy stored by the capacitor.

In a simple photographic flashgun, a $0.20 \mathrm{F}$ capacitor is charged by a $9.0 \mathrm{V}$ battery. It is then discharged in a flash of duration $0.01 \mathrm{s}$. Calculate the average power dissipated during the flash.

In a simple photographic flashgun, a $0.20 \mathrm{F}$ capacitor is charged by a $9.0 \mathrm{V}$ battery. It is then discharged in a flash of duration $0.01 \mathrm{s}$. Calculate the average current in the flash bulb.

In a simple photographic flashgun, a $0.20 \mathrm{F}$ capacitor is charged by a $9.0 \mathrm{V}$ battery. It is then discharged in a flash of duration $0.01 \mathrm{s}$. Calculate the approximate resistance of the bulb.