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Science 9: Electrical Principles and Technologies
Ohm’s Law Worksheet
Answer the following questions on a separate sheet of paper.
Show all work and formulas.
1.
A TV set uses a current of 12 A and has a resistance of 10 , what is the
voltage?
2.
What is the voltage in a circuit that has a current of 0.4 A and a resistance
of 0.4 ?
3.
Convert your answer from question 2 into millivolts.
4.
A circuit has a voltage of 20 V and has a resistance of 4.5 , how much
current will the circuit use?
5.
A circuit has an internal resistance of 80  and uses a voltage of 1.2 V what
is the current in the circuit?
6.
A toaster has a resistance of 60  and is plugged into a 120 V power supply,
what is the current in the toaster?
7.
A circuit has a voltage of 20 V and draws a current 4.2 A what is the
resistance in the circuit?
8.
A circuit has a potential difference of 60 V and a current of 15 A, what is
the resistance in the circuit?
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