An electric rod of 2000 watts rating boils a certain quantity of water in 10 minutes, the heat generated for boiling this water is:
Correct answer: B. 12 x 10^5 Joules
- A. 8 x 10^4 Joules
- B. 12 x 10^5 Joules
- C. 19 x 10^5 Joules
- D. 23 x 10^5 Joules
- E. 37 x 10^5 Joules
Explanation
Energy=Power x timeEnergy=2000 x 10 x 60Energy=12 x 105 J
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Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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