The circuit at the right contains an ideal battery, identical bulbs and a switch

Question

The circuit at the right contains an ideal battery, identical bulbs and a switch.

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2) The circuit at the right contains an ideal battery, identical bulbs andS a switch. a) With the switch open, rank the brightness of the bulbs, from brightest to dimmest. Explain. Buss A,BD will all 61 b) After the switch is closed will the current through bulb D increase, decrease or remain the same? Explain c) Describe what happens to the brightness of bulb C, from the initial time with the switch open to after the switch closes

Explanation / Answer

a) when the switch is open ,

as the current through A , B and D is same , and no current is flowing in C

bulbs A , B , D are equally bright while C is not glowing

b)

after closing the switch

as the resistance in the circuit decreases

the current in the circuit will increase and brightness of bulb D will increase

c)

initially there was no current in the bulb C , after closing the switch , circuit completes

and bulb C starts glowing

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