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qid 10238 · physics

Question: What is the cost of operating for 24 hr a lamp requiring1.0 amp on a 100-volt line if the cost of electric energy is $0.50/kw-hr?

  1. $3.00
  2. $0.05
  3. $0.50
  4. $0.24
  5. $0.30
  6. $0.12
  7. $1.20
  8. $2.40
  9. $0.60
  10. $1.00

Our answer: F. $0.12 Source quote machine-checked (exact quote)

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How it was answered

Multi-step solver (maze), replayed by code

card: maze · card sha256 d79f5bdaf4aa6a63…

Current source

OpenStax College Physics 2e, 20.4 Electric Power and Energy

https://openstax.org/books/college-physics-2e/pages/20-4-electric-power-and-energy

“To find the operating cost, we first find the energy used in kilowatt-hours and then multiply by the cost per kilowatt-hour.”

Source quote machine-checked (exact quote)

retrieved 2026-09-18T00:33:51.180Z

page text sha256 2ee3772db13f7ef3… · content sha256 daf3c88b2e99bceb…

addendum maze_qid10238_KEY_INFORMED_b4_maze_input_ADDENDUM_source_rs20260918T003351Z · sha256 d6a6159330bb7198… · replaces the version below, addendum sha256 913cbd6b6637c059…

Earlier version (superseded)

No public source has been found for this card yet (3 places checked internally).

addendum maze_qid10238_KEY_INFORMED_b4_maze_input_ADDENDUM_source · sha256 913cbd6b6637c059…

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