Complex resistor combination
22. Three identical light bulbs are connected in circuit to a battery, as shown below. Compare the level of brightness of each bulb when all the bulbs are illuminated. What happens to the brightness of each bulb if the following changes are made to the circuit?
a. Bulb A is removed from its socket.
b. Bulb C is removed from its socket.
c. A wire is connected directly between points D and E.
d. A wire is connected directly between points D and F.