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4 cards from this section. Quick, good the night before a test.
What unit measures voltage?
Think about the pressure that pushes electrons.
If current is 2A and resistance is 5Ω, what is the voltage?
Use the formula V = I × R.
What is the unit of current?
Think about how current flows in a circuit.
True or False: Voltage is the same thing as power.
Recall how power is calculated.
You have a circuit with a voltage of 15V, and a total resistance of 3Ω. Calculate the current and the power utilized by the circuit.
Work through Ohm's Law to find current first.
If your robot's motor requires 4A current and operates at 12V, calculate the resistance needed in the circuit.
Rearranging Ohm's Law helps you find resistance.
4 more questions in this section. Enroll free to practise them all.
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