Physics Questions, please help?

[Curious John]

Describe the energy conversions that occur in eachof the following devices.
a) an incandescent lightbulb
b) a clothes dryer
c) a digital clock radio

Which wire conducts electricity with the least resistance and why: one with a large cross-sectional diameter or one with a small cross-sectional diameter?

An incandescent lightbulb with a resistance of 10.0 when it is not lit and a resistance of 40.0 when it is lit has 120 V placed across it.
a) what is the current draw when the bulb is lit?
b) what is the current draw at the instant the bulb is turned on?
c) when does the lightbulb use the most power?