Use the ∆V=I•R equation to solve for an unknown quantity when given the other two quantities.
A power saw at the local hardware store boasts of having a 17.9-Amp motor. Determine its resistance when plugged into a 110-Volt outlet.
Resistance
Ohms
A coffee cup immersion heater utilizes a heating coil with a resistance of 8.72 Ω. Determine the current through the coil when operated at 115 Volts.
Current
Amps
A typical color television draws about 3.41 Amps when connected to a 110-Volt source. What is the effective resistance of the TV set?
When operating at 110 volts, a resistor carries a current of 8.60 Amps. What current would be carried if the operation voltage is lowered to 87 Volts?
Lisa Honda pulls into the garage and turns off her car. She flips on the car's inside overhead lights so she can gather her belongings. The car's battery impresses 12 Volts across the light and the current in the light is 0.308 Amps. What is the power rating of the light bulb?
Power
Watts
The headlight on a car has a resistance of 18.4 Ω and is powered by a 12-Volt battery. Calculate the current in the headlight.
An electric motor draws 3.88 Amps of current when connected to a voltage source. A quick measurement indicates that it has a resistance of 25.4 Ω, Determine the voltage of the voltage source.
Voltage
Volts