Practice report
Quick drill · Basic Electricity
2 to work on
Same questions again, out loud. This report stays as it is.
What to work on
You went quiet for about 9s before one answer. Say the part you're sure of first; the examiner expects a pause, not a freeze.
3 answers opened with 'I think' or 'maybe'. State it plainly; hedge only when you really aren't sure.
Your answersWeakest first
Question 4: What happens to the wiring when current flow in a circuit exceeds normal?
MissedQuestion 2: How do you determine the total resistance of a DC circuit?
PartlyQuestion 1: How are current, voltage, and resistance related in an electrical circuit?
Met“Um, okay. So voltage is, like, what pushes the current, and resistance kind of works against it. The more resistance you've got, the less current you get. That's Ohm's law, I think.” … “If the resistance stays the same, the current doubles too. Yeah. It doubles. So they're, um, directly proportional. It's a straight line.”
- In most cases, the greater the circuit resistance, the less the current
- This relation is linear in nature and is known as Ohm’s Law
FAA-H-8083-30B, p. 12-17, 12-18
Explore further
The two fundamental properties of current and voltage are related by a third property known as resistance. In any electrical circuit, when voltage is applied to it, a current results. The resistance of the conductor determines the amount of current that flows under the given voltage. In most cases, the greater the circuit resistance, the less the current, and if the resistance is reduced, then the current increases. This relation is linear in nature and is known as Ohm’s Law; being linearly proportional means that if one unit in the relationship increases or decreases by a certain percentage, the other variables in the relationship increase or decrease by the same percentage. For example, if the voltage across a resistor is doubled, then the current through the resistor doubles. It should be added that this relationship is true only if the resistance in the circuit remains constant; if the resistance changes, current also changes.
- The two fundamental properties of current and voltage are related by a third property known as resistance
A DME might follow up with
Voltage and current both doubled in that example. What does that tell you about the nature of the relationship?