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Kettle Race

An AC kettle races a DC kettle. Find the DC that heats the same.

Physics · Class 12 · AC, peak and rms values · 8 simulations. For JEE, NEET and your boards.

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What you'll learn

  1. Which way now?: AC turns round every half cycle
  2. The DC twin: The rms value heats like DC
  3. Match the heat: Same heat means the same I²R
  4. Kettle on the mains: Ohm's law at every instant
  5. Peak to rms: Time from the phase
  6. Sine plus cosine: Two sines a quarter cycle apart make one sine
  7. DC with a ripple: DC plus AC: add the squares
  8. Sawtooth: The rms value of any wave