Question
What formula is used to calculate voltage in a circuit?
Answer Options
- A) E = I x R
- B) E = I / R
- C) E = I + R
- D) E = I – R
Correct Answer: A
Explanation
This is the primary form of Ohm’s Law. To calculate voltage (\text{E}) in a circuit, you multiply the current (\text{I}) by the resistance (\text{R}): E = I \times R.
This formula is used to calculate the voltage drop across a component (like a resistor) when you know its resistance and the current flowing through it, a common calculation in circuit design.
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