Multiple-Choice Homework Problem 13.3 A potential difference V is established ac

Question

Multiple-Choice Homework Problem 13.3 A potential difference V is established across a wire of resistance R drawing a power P from the circuit. If the resistance is doubled while the potential difference remains the same, what is the new power in term of the original power P? Select One of the Following: (a) P (b) 2P (c) 4P (d) P/2 (e) P/4 1

Multiple-Choice Homework Problem 13.4 The circuit given has a battery, an ammeter, and a collection of resistors. What happens to the current through R6 if R2 is decreased? Select One of the Following: (a) The current increases. (b) The current decreases. (c) The current stays the same.

Explanation / Answer

13.3 Power = V2/R => power is inversely proportional to R at constant V, so on doubling R , power = P/2

13.4 on decreasing R2 overall resistance will decrease and hence current through the battery increases and so does the current through R6 so (a) the current increases

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