Uploaded November 2021 | Updated September 2026, 2 weeks ago

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In this video, I go through a number of different types of problems related to power in DC electrical circuits.

Timeline:

00:18 - Q1. Calculate power dissipated by a resistor when voltage is known
00:48 - Q2. Calculate power dissipated by a resistor when current is known
01:18 - Q3. Calculate current into circuit when power and voltage are known.
02:13 - Q4. Calculate resistor value needed for a heater when power and voltage are known
03:24 - Q5. Calculate maximum allowable voltage across a resistor with a 2W power rating
04:25 - Q6. Calculate current allowable voltage through a resistor with a 10W power rating
05:30 - Q7. Calculate resistor values given voltage and power
07:05 - Q8. Calculate power out of a given voltage source
10:52 - Q9. Calculate maximum output power given 5% resistors.

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