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- Lesson 1 Assessment

Lesson 1 Assessment:

Circuits, Volts, Amps & Ohms

A passing grade of 80% or higher is required to advance to Lesson 2.

Question 1

Question 1 Explained

Watch this explanation to understand which answer is correct and why the others are incorrect.

Question 1 - Second Attempt Explained

A. The motor has 4 amps of resistance.
Incorrect. Resistance is measured in ohms, not amps. Amps measure the amount of electrical current flowing through a circuit.

B. The motor is receiving 120 volts.
While this might be true, the meter is measuring amperage, not voltage. We cannot determine the voltage from a current measurement alone.

C. A certain amount of electrical charge (electrons) is passing through that wire every second.
Correct. Amperage tells us how much electrical charge (electrons) passes through a point in a wire every second. A reading of 4 amps tells us that electrical current is flowing at that rate through the wire, but it doesn't tell us the voltage, resistance, or whether the motor is operating properly.

D. The motor is operating normally because electrical current is flowing.
Incorrect. Current flow tells us electricity is moving through the circuit, but it does not tell us if it is the right amount for the motor to operate properly. We have to check the motor data plate to determine that.