Written Question #1: When the switch is closed in the circuit shown does the lig
ID: 1318362 • Letter: W
Question
Written Question #1: When the switch is closed in the circuit shown does the lightbulb's brightness increase, decrease or stay the same? Assume the power the dissipated determines brightness. For full points. your answer must include an explanation. Written Question #2: When the switch is closed in the circuit shown does the brightness of the single lightbulb in the lower branch of the circuit increase, decrease or stay the same? Assume the power the dissipated determines brightness. For full points, your answer must include an explanation.Explanation / Answer
a) as we close the switch the effective resistance of parallel part reduces,
=> net resistance of the circuit decreases
=> current - increases
=> voltage drop across bulb - increases so it's bightness increases
b) in this part voltage sourse directly connected to the bulb so power dissipation remains same across the bulb (V^2/R)
so brightness remains same as before
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.