A 24-volt control coil draws 0.20 ampere in steady state. What is its effective resistance?
- 120 ohms
- B24.2 ohms
- C0.0083 ohm
- D4.8 ohms
Why A is correct
Using Ohm’s law, resistance equals voltage divided by current. Twenty-four volts divided by 0.20 ampere equals 120 ohms; multiplying voltage and current would calculate watts instead.