Suppose voltage V is applied across resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case will be
- A.P
- B.3P
- C.P/3
- D.2P/3
Show answer
Three equal resistors R in parallel have a combined resistance of R/3, and at the same voltage the power, V²/R, becomes three times as large.
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