Ohm's Law describes current through a conductor between two points as directly proportional to which quantity?

Ohm's Law describes current through a conductor between two points as directly proportional to which quantity?

• A. Resistance
• B. Voltage
• C. Capacitance
• D. Temperature

Answer: (B)

Ohm's Law shows that current through a conductor is directly proportional to the voltage across it, as long as the resistance stays the same. This is captured by I = V / R, so when R is constant, increasing the voltage directly increases the current (doubling V doubles I). Capacitance and temperature aren’t the direct factors in this simple linear relationship: capacitance governs charging in reactive circuits (i = C dv/dt), and temperature can change resistance, which would then change the current.

Ohm's Law shows that current through a conductor is directly proportional to the voltage across it, as long as the resistance stays the same. This is captured by I = V / R, so when R is constant, increasing the voltage directly increases the current (doubling V doubles I). Capacitance and temperature aren’t the direct factors in this simple linear relationship: capacitance governs charging in reactive circuits (i = C dv/dt), and temperature can change resistance, which would then change the current.