(a)[2]
State what the circuit in Fig. 7.1 is designed to do.
(b)
Fig. 7.2 shows how $V_{\text{OUT}}$ changes with time $t$.
(b(i))[2]
The load resistor $R$ has resistance $370\,\Omega$. Show that the greatest power dissipated in $R$ is $0.22\,\text{W}$.
(b(ii))[3]
On Fig. 7.3, sketch how the power $P$ dissipated in $R$ varies with $t$.
(b(iii))[1]
Calculate the mean power dissipated in $R$.
(c)[2]
The circuit of Fig. 7.1 is disconnected, and $R$ is connected directly across the power supply. Explain, without calculation, how the mean power now dissipated in $R$ compares with the answer in (b)(iii).