Question

which law defines how voltage is calculated using v=ir? parallel circuit law ohm’s law law of conservation of energy series circuit rule

Explanation:

The formula \( V = IR \) (where \( V \) is voltage, \( I \) is current, and \( R \) is resistance) is the definition of Ohm's Law. The other options: Parallel circuit law deals with current/voltage in parallel circuits, Law of conservation of energy is about energy conservation, and Series circuit rule deals with series circuits—none define \( V = IR \).

Answer:

B. Ohm’s law (assuming the options are labeled as A. Parallel circuit law, B. Ohm’s law, C. Law of conservation of energy, D. Series circuit rule; if labels differ, adjust to the correct label with "Ohm’s law").