The graph below shows the variation of 
with the charge 
on the plates of capacitor C as the capacitor discharges.
Determine the capacitance of capacitor C. Give a unit with your answer.
The graph below shows the variation with 
of 
.
Determine the time constant 
of the circuit in the figure shown above.
Calculate the resistance of resistor 
.
and 
, and a resistor of resistance 
, are connected into the circuit shown below.
. The two-way switch is now moved to position Y. Determine the time taken for the potential difference (p.d.) across the 
.
. The capacitor is connected into the circuit shown in the figure below.
.
.
. The output p.d. across the 
resistor is 
.
of 
for the discharge of the capacitor through the resistor is 
.
. Give a unit with your answer.
and a resistor of resistance 
are connected as shown in the figure below.
. The graph below shows the variation with 
of the potential difference (p.d.) 
across the resistor.
of the charge 
on one of the plates of a capacitor is shown in the graph below.
power supply and two resistors 
and 
as shown in the figure below.
and the resistance of 
. The switch can be in either position X or position Y.
.
. Determine the time 
taken for the stored energy to decrease from 
.
is connected to a battery of electromotive force (e.m.f.) 
in the circuit shown in the figure below.
. These wires are placed near to, and parallel to, each other. Wire Q is connected to a voltmeter. At time 
, switch S is moved to position Y so that the capacitor discharges through wire P. Calculate the time constant 
of the discharge circuit.
, a resistor 
, and a two-way switch are connected in the circuit shown in the figure below.
after the switch is moved the charge on the capacitor is 
. The variation with 
(Q/
) is shown in the graph below.
.
and a resistor of resistance 
are connected as shown in the figure below.
. The graph below shows the variation with 
of the charge 
on the capacitor.
.
and a resistor of resistance 
are connected as shown in the figure below.
. The graphs below show the variations with 
of the charge 
on the capacitor and the potential difference (p.d.) 
across the resistor.
. Use the two graphs above to determine:
.
