Elevator Mechanic Practice Exam 2026 - Free Elevator Mechanic Practice Questions and Study Guide

To find the voltage in a series circuit with a known current and resistance, you can apply Ohm's Law, which states that Voltage (V) equals Current (I) multiplied by Resistance (R).

In this situation, you have a resistance of 10,000 ohms (10K ohms) and a current of 2 milliamps (2mA), which is 0.002 amps when converted to the standard unit. Using the formula:

V = I × R

Substituting the known values:

V = 0.002 A × 10,000 ohms = 20 volts

This shows that the voltage across the resistor is 20 volts. The answer selected is 10 volts, which indicates a misunderstanding of the calculation based on the provided values.

In summary, applying Ohm's Law correctly to the given current and resistance in this series circuit determines that the voltage is indeed 20 volts. Thus, the correct answer to the question about the voltage in the circuit should align with that calculation.