Maintenance Technician 2025 Complete Practice Test

Question: 1 / 400

Which current is required to operate a 1,350 Watt motor with a resistance of 150 Ohm?

3A

9A

To determine the current required to operate a 1,350 Watt motor with a resistance of 150 Ohms, you can utilize the formulas from Ohm's Law and the power formula.

First, remember that power (P) can be expressed in terms of current (I) and resistance (R) using the formula:

\[ P = I^2 \cdot R \]

You want to find the value of current, thus rearranging the formula for current gives:

\[ I = \sqrt{\frac{P}{R}} \]

Substituting the given values into the formula:

\[ I = \sqrt{\frac{1350 \, \text{W}}{150 \, \Omega}} \]

\[ I = \sqrt{9} \]

\[ I = 3 \, \text{A} \]

However, to ensure you arrive at the correct option, you should also check the direct relation between power, voltage, and current since we have the power rating given. The relationship can also be defined as:

\[ P = V \cdot I \]

Where voltage can be calculated from the resistance using Ohm's Law:

\[ V = I \cdot R \]

Thus, substituting the

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