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Class 10 Physics (India)

Course: Class 10 Physics (India) > Unit 3

Lesson 7: Electric power and heating effect of current
Science
Class 10 Physics (India)
Electricity
Electric power and heating effect of current
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Electric power (formula)

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Problem

Diane is building her own electronic calculator.
She maintains a potential difference, V, equals, 3, point, 0, space, start text, m, V, end text, in one of its circuits with power, P, equals, 21, space, start text, m, W, end text.
What is the amount of charge, Q, that moves through the circuit during a time period, t, equals, 10, space, start text, s, end text?
Note: Let's calculate in the SI unit.
Q, equals
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
start text, C, end text
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