What is the current through a 100-ohm resistor connected across 200 volts?

This question requires the use of Ohm's Law, specifically the formula for finding current: I = E / R, where I is current in amperes, E is voltage in volts, and R is resistance in ohms. By substituting the given values into the formula, you divide the 200 volts by the 100 ohms. This straightforward calculation (200 / 100) gives a current of 2 amperes. The incorrect options come from basic math errors or using the wrong variation of Ohm's Law, like multiplying 200 by 100 to get 20,000 amperes or dividing the resistance by the voltage to get 0.5 amperes.