Questions:

1. Given that $V\propto I$ according to Ohm's Law, will the slope of the $I(V)$ (``I as a function of V'') graph be relatively steep or shallow if $R$ is relatively big?
2. Compare then the resistance of the two combinations of equivalent resistor with the value of one of them individually. Use the definition of $R=\rho A/l$, to explain why this result could've been predicted.
3. What happens to the resistance of the light bulb filament as the voltage is increased. Could this be predicted?
4. Make a good guess at the substance used hook-up wire.