Elevator Mechanic Practice Exam

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In a series circuit with a 10K ohm resistor and a 2mA current, what is the voltage?

  1. 10v

  2. 15v

  3. 20v

  4. 25v

The correct answer is: 10v

To determine the voltage in a series circuit with a resistor, you can use Ohm's Law, which states that Voltage (V) is equal to Current (I) times Resistance (R). Here, we have a 10,000 ohm (10K ohm) resistor and a current of 2 milliamps (2mA), which can be converted to amps as 0.002A. Using the formula: V = I × R Substituting in the given values: V = 0.002A × 10,000 ohms = 20 volts. This means the voltage across the 10K ohm resistor at a current of 2mA is indeed 20 volts. The correct answer reflects the proper application of Ohm's Law to the given values.

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