Homework Answers
Ans: Option 1. Bulb 1 will get brighter and bulb 3 will get dimmer.
Case 1. When the switch is open.
Total Resistance = R + R = 2R
Current = V/2R (though both the bulb)
Case 2.
when the switch is closed.
Total resistance = R + R/2 = 3R/2
Current throght bulb 1 = 2V/3R
Current through bulb 2 and bulb 3 would be equally distributed, which would be V/3R.
So, Current through 1 is increasing from V/2R to 2V/3R.
and Current through bulb 3 is decreasing from V/2R to V/3R.
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