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4 cards from this section. Quick, good the night before a test.
What is the formula for power dissipation in terms of current and resistance?
Think about the relationship between current and heat.
If the current is 3 Amperes and the resistance is 5 Ohms, what is the power dissipation?
Square the current first and then multiply by resistance.
What is the formula for calculating power dissipation in resistors?
Focus on the relationship between current and resistance.
True or False: Power can also be represented as P=V²/R using Ohm's Law.
Recall the connection between voltage and resistance.
A resistor dissipates 64 Watts of power when connected to a 16 Ohm resistor. Calculate the current flowing through it and the voltage across it.
Use P = I²R to find both I and V.
A device uses a power of 150 Watts at 120 Volts. What is the resistance? How much current is flowing?
First find resistance using the formula, then calculate current.
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