Problem 1: Calculating Voltage

Let's consider a circuit with a resistance of 10 ohms and a current of 2 amperes. To find the voltage across the circuit, we can use Ohm's Law:

V = I x R

Substituting the given values, we get:

V = 2 A x 10 Ω = 20 V

Therefore, the voltage across the circuit is 20 volts.