What does Ohm's law state about the relationship between current, voltage, and resistance?

What does Ohm's law state about the relationship between current, voltage, and resistance?

• A. The current in a circuit is inversely proportional to the applied voltage and directly proportional to the circuit resistance.
• B. Voltage is proportional to the sum of current and resistance.
• C. The current in a circuit is directly proportional to the applied voltage and inversely proportional to the circuit resistance.
• D. Resistance equals current multiplied by voltage.

Answer: (C)

Ohm's law shows how current depends on voltage and resistance. It’s expressed as I = V / R, meaning current increases with higher voltage and decreases with higher resistance, assuming the other quantity stays the same. So the statement that current is directly proportional to the applied voltage and inversely proportional to the circuit resistance matches this relationship exactly. This can be seen in practical terms: doubling the voltage while keeping resistance the same doubles the current; doubling the resistance with a fixed voltage halves the current. The other options mix up the relationships—voltage isn’t the sum of current and resistance, current doesn’t decrease when voltage rises, and resistance isn’t the product of current and voltage (R = V / I, not V × I).

Ohm's law shows how current depends on voltage and resistance. It’s expressed as I = V / R, meaning current increases with higher voltage and decreases with higher resistance, assuming the other quantity stays the same. So the statement that current is directly proportional to the applied voltage and inversely proportional to the circuit resistance matches this relationship exactly.

This can be seen in practical terms: doubling the voltage while keeping resistance the same doubles the current; doubling the resistance with a fixed voltage halves the current. The other options mix up the relationships—voltage isn’t the sum of current and resistance, current doesn’t decrease when voltage rises, and resistance isn’t the product of current and voltage (R = V / I, not V × I).