Solve each problem. Be sure to show your work and give a final answer with units rounded to the given number of significant figures.
1) Find the voltage on a circuit with a resistance of 12.5 Ω if it has a current of 2.35 A.
2) If a circuit with a 9.0 V battery has a current of 6.2 A, how much resistance is in the circuit?
3) A circuit has three resistors with values of 4.0 Ω, 8.0 Ω, and 12 Ω. What is the equivalent resistance if they are wired in series?
4) A circuit has three resistors with values of 4.0 Ω, 8.0 Ω, and 12 Ω. What is the equivalent resistance if they are wired in parallel?
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