Homework5 PHYS 1404 due March 29, 2018 Homework should be written out neatly on
ID: 2030125 • Letter: H
Question
Homework5 PHYS 1404 due March 29, 2018 Homework should be written out neatly on a separate sheet of paper. Explain your reasoning 1) Consider the following circuit. a) If a wire were added to the circuit as shown in the diagram below a) would the current through (i) bulb A increase, decrease or remain the same? Explain your reasoning. (ii) bulb D increase, decrease or remain the same? Explain your reasoning. (ii) bulb C increase, decrease or remain the same? Explain your reasoning. (iv) the battery increase, decrease or remain the same? Explain your reasoning. b) would the potential difference across (i) bulb A increase, decrease or remain the same? Explain your reasoning. (ii) bulb D increase, decrease or remain the same? Explain your reasoning. (ii) bulb C increase, decrease or remain the same? Explain your reasoning. (iv) the battery increase, decrease or remain the same? Explain your reasoning.Explanation / Answer
a) i) the current through bulb A would decrease, it would in fact become zero as the potential difference across it is zero.
ii) bulb D remains same as the potential difference across bulb D does not change.
iii) bulb C increases as the potential difference across C increases.
iv) through the battery increaes due to decrease in effective resistance of the circuit
b) potential difference across bulb A becomes zero, hence decreases
ii) potential difference across bulb D remains same
iii) bulb C increases, as the potential difference across A becomes zero, the total potential difference of battery appears across C
iv) potentaial difference across battery remains same, if the internal resistance is negligible
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