9 A particular experiment requires a very large current to be provided for a short time. (a) An average current of 200 A is to be supplied to a coil of wire for a time of
1.4 x 10 s. The resistance of the coil is 0.50.12.
Show that the charge that flows through the coil during this time is about 3 C.
Q=
fil) The circuit shows how a capacitor could be charged and then discharged through
the coil to provide the current.
+ DC
supply

coil of resistance
0.5092
The circuit contains a capacitor of capacitance 600 JF. This capacitor is suitable
to provide the current for 1.4 x 10's.
Explain why the capacitor is suitable.