Ohm's law says that when electric current is flowing across a resistor, the current i, measured in amperes, can be calculated from the voltage v, measured in volts, and the resistance R, measured in ohms. The relationship is given by

i =

v

R

amperes.(a) A resistor in a radio circuit is rated at 5000 ohms.

(i) Find a formula for the current as a function of the voltage. i =