A student starts with a 1-battery, 2-bulb series circuit. The student then adds
ID: 1385776 • Letter: A
Question
A student starts with a 1-battery, 2-bulb series circuit. The student then adds bulbs, one at a time, in parallel across bulb B as shown below.
After each addition, the student compares the brightness of bulb A to that of bulbs W and X in the circuits below and the brightness of bulb B to that of bulbs Y and Z.
As more and more bulbs are added, the brightness of bulb A ---Select--- (does not change as bulbs are added./ becomes more and more similar to the brightness of bulb W. /becomes more and more similar to the brightness of bulb X./ increases, brightening until the bulb burns out. /decreases to zero. )
As more and more bulbs are added, the brightness of bulb B ---Select--- (does not change as bulbs are added/ becomes more and more similar to the brightness of bulb Y./ becomes more and more similar to the brightness of bulb Z./ increases, brightening until the bulb burns out./ approaches the same brightness as bulb A does.
Explain your reasoning behind your choices for the behavior of both bulbs A and B below.
Explanation / Answer
A) As the Group of the bulbs are adding,the volatage across the Group of the bulbs will decreases and Full volatge of battery is applied only across Bulb A.Hence the brightness of the bulb A increses,brightening until the bulb burns out
B) more number of bulbs in parallel.Resitance will drops more
hence the answer is the brightness of bulb B Becoms more and more similar to the brightness of Bulb Z
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