Unless otherwise stated, in this homework, treat all bulbs as identical, and all

Question

Unless otherwise stated, in this homework, treat all bulbs as identical, and all batteries as identical and ideal. 1. Recall circuit IX from the tutorial, which is reproduced at right. In the tutorial, batteries A and B were identical. In this problem, you 12 will consider two cases in which they are not. 11 a. Suppose that the absolute value of the potential difference across battery B were reduced, but battery A is unchanged. When the switch is closed, would bulb 12 light? Explain your reasoning. Circuit IX If you believe that bulb 12 would light when the switch is closed, draw an arrow on the diagram at right to indicate the direction of the current through it. Explain your reasoning. When the switch is closed, would bul 11 be brighter than, dimmer than, or as bright as it was in the tutorial? Explain.

Explanation / Answer

yes the bulb 12 will light,since the current from battery A is distributed into bulbs 11 and 12

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the direction of current is into the positive terminal of the battery or downward direction in the right branch

since current flows from higher potential (A) to lower potential (B) ,the current passes into the positive terminal of the battery

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since bulbs 11 and 12 are connected in parallel,then bulb 11 as bright as it was in the tutorial

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