In the laboratory, a student makes some measurements on the circuits below. She

Question

In the laboratory, a student makes some measurements on the circuits below. She measures a current of 200 mA through bulb A and a current of 100 mA through bulb B. All the batteries and bulbs are identical.

On the basis of these measurements, determine the value of the current through each of the other circuit elements. All units are milliamps (mA).

In the laboratory, a student makes some measurements on the circuits below. She measures a current of 200 mA through bulb A and a current of 100 mA through bulb B. All the batteries and bulbs are identical. On the basis of these measurements, determine the value of the current through each of the other circuit elements. All units are milliamps (mA). The current through battery 1: The current through battery 2: The current through battery 3: The current through bulb C: The current through bulb D: The current through bulb E:

Explanation / Answer

let RA = RB = RC = RD = RE = R



1) current through RA = current thorugh battery 1 = 200 mA

2)current through RB = current thorugh battery 2 = 100 mA

3) as D and E are in parallel Rnet = R/2

so current through battery 3 = 400 mA


4)current through bulb c = current thorugh bulb B = 100 mA

5)

current thorugh bulb D = 200 mA



6) current thorugh bulb E = 200 mA

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