If a 100-ohm resistor is connected across 200 volts, what is the current through the resistor?

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Multiple Choice

If a 100-ohm resistor is connected across 200 volts, what is the current through the resistor?

Current through a resistor is found using Ohm’s law: I = V / R. With 200 volts across a 100-ohm resistor, the current is I = 200 / 100 = 2 amperes. So the resistor carries 2 A. To see why the other numbers don’t fit: 1 ampere would require 100 V across 100 ohms; 300 amperes would need 30,000 V; 20,000 amperes would need 2,000,000 V.

Current through a resistor is found using Ohm’s law: I = V / R. With 200 volts across a 100-ohm resistor, the current is I = 200 / 100 = 2 amperes. So the resistor carries 2 A.

To see why the other numbers don’t fit: 1 ampere would require 100 V across 100 ohms; 300 amperes would need 30,000 V; 20,000 amperes would need 2,000,000 V.

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