If E = IR, what is the formula to find I?

If E = IR, what is the formula to find I?

• A. I = E + R
• B. I = E - R
• C. I = E x R
• D. I = E / R

Answer: (D)

The formula E = IR represents Ohm's Law, which defines the relationship between voltage (E), current (I), and resistance (R) in an electrical circuit. To isolate current (I) in this equation, you need to rearrange it. Since E (voltage) equals the product of I (current) and R (resistance), to find the current, you divide both sides of the equation by R. This operation yields the formula I = E / R. Thus, if you know the voltage and resistance in a circuit, you can easily calculate the current using this rearranged formula. This understanding is essential for troubleshooting electrical circuits and ensuring they operate within their designed parameters.

The formula E = IR represents Ohm's Law, which defines the relationship between voltage (E), current (I), and resistance (R) in an electrical circuit. To isolate current (I) in this equation, you need to rearrange it.

Since E (voltage) equals the product of I (current) and R (resistance), to find the current, you divide both sides of the equation by R. This operation yields the formula I = E / R.

Thus, if you know the voltage and resistance in a circuit, you can easily calculate the current using this rearranged formula. This understanding is essential for troubleshooting electrical circuits and ensuring they operate within their designed parameters.