The minimum power dissipation rating of a...

Question 1 of 29218M1rl2qYSLWe7gaH53pNP

The minimum power dissipation rating of a resistor of 20,000 ohms across a potential of 500 V should be:

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Question 1 of 29218

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The minimum power dissipation rating of a resistor of 20,000 ohms across a potential of 500 V should be:

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🔍 Key Concepts

• Ohms Law and how voltage, current, and resistance are related • The power formula for resistors: relationships among power (P), voltage (V), current (I), and resistance (R) • What minimum power rating means in terms of actual power dissipated vs. nameplate rating

💭 Think About

• First, express the current through a 20,000-ohm resistor when 500 V is applied across it. Which Ohms Law formula lets you find current from voltage and resistance? • Once you know either current or have voltage and resistance, choose the power formula that avoids extra steps: do you want to use P = VI, P = I^2R, or P = V^2/R? • Compare your calculated power to the answer choices. Should the minimum rating be exactly equal to the calculated power or safely above it?

✅ Before You Answer

• Double-check your unit conversions: ohms, volts, and watts must be consistent with each other • Confirm that you squared the correct value (voltage or current) in the power formula you used • Make sure the rating you pick is not less than the power you calculated, since the resistor must safely dissipate that amount of power