Ohm's Law

Question

A resistor of 10 Ω carries a current of 2 A. What is the potential difference across it?

RankGuru · Accepted Answer

1. **Definition of Ohm's Law**: The potential difference ($V$) across a resistor is product of the current ($I$) flowing through it and its resistance ($R$).
   - Formula: $V = IR$.
2. **Identify Given Values**: 
   - Resistance $R = 10 	ext{ } \Omega$.
   - Current $I = 2 	ext{ A}$.
3. **Calculation**:
   - $V = 2 	ext{ A} 	imes 10 	ext{ } \Omega$
   - $V = 20 	ext{ V}$.
4. **Conclusion**: The voltage drop across the resistor is 20 Volts.

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