Recall the circuit from class, reproduced above. Suppose batteries A and B are not identical.
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?
When the switch is closed, would bulb 11 be brighter than, dimmer than, or as bright as it was in class?
Suppose instead that the absolute value of the potential difference across battery A were reduced, but battery B were unchanged (the same as it was in class).
When the switch is closed, would bulb 12 light?
When the switch is closed, would bulb 11 be brighter than, dimmer than, or as bright as it was in class?
Explanation26.4.2.Circuit II.
Figure26.4.2.Circuit diagram.
Consider the circuit shown above, which is a variant of the circuit from class. All bulbs are identical, and all batteries are ideal and identical. (Note that the orientation of battery D has changed.)
Is bulb 2 brighter than, dimmer than, or as bright as bulb 1? Explain your reasoning
Sketch appropriate voltage diagrams for this circuit.
Use your diagrams to rank the voltages \(V_1\text{,}\)\(V_2\text{,}\)\(V_C\text{,}\) and \(V_D\) from greatest to least. Explain how you determined your answer.
On the circuit diagram, draw arrows to indicate the direction of the current through each battery and each bulb.
Rank the currents \(I_1\text{,}\)\(I_2\text{,}\)\(I_C\text{,}\) and \(I_D\) from greatest to least. Explain how you determined your answer.
Suppose that bulb 1 were removed, leaving a gap in the circuit. Would this cause bulb 2 to get brighter, less bright, or to stay the same brightness? Explain.
Suppose that battery C were removed, leaving a gap in the circuit. Would this cause bulbs 1 and 2 to get brighter, less bright, or to stay the same brightness? Explain.
SubsectionA*R*C*S Practice
A*R*C*S26.4.3.Circuit III.
Figure26.4.3.Circuit diagram.
The switch shown has been set to the left in the circuit above for a long time (the two batteries are identical). You then flip the switch to the right. Immediately after you flip the switch, what is the current through the circuit?
