Philip P. answered • 06/05/16

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Ohm's Law:

V = I*R where:

- V = voltage in volts
- I = Current in amperes (amps)
- R = Resistance in ohms

Initially V = 8 volts and I = 2 amps. Find the resistance, R:

V = I*R

8 volts = (2 amperes)*R

(8 volts)/(2 amps) = R

**4 ohms = R**

When the voltage is increased to 12 volts, we know R = 4 ohms. Find the current I:

V = I*R

12 volts = I*(4 ohms)

(12 volts)/(4 ohms) = I

**3 amps = I**