Describe an activity to show that in a parallel combination of resistors the total current is equal to the sum of the individual currents through different resistors
Answers
Let us consider three bulbs (B1,B2 & B3) connected in parallel to a battery with different Resistance of (R1,R2 & R3).
As the connection divides at the junction, current (i) produced due to the potential difference (v) will also get divided Into i1,i2 & i3. When the current gets divided from the point A into i1 i2 and i3 e it again needs at a junction Point B. As we know that current is a form of energy.
By the law of conservation of energy,
Energy can be neither created nor destroyed. It must be totally conserved.
Hence, i net = i1 + i2 + i3.
Note that it can be also proved by using resistance in parallel formula.
R = V/I From ohm's Law.
=> I/R = V/I
As 1/R = 1/R1 + 1/R2 + ..... 1/R n
=> i net /v = i1 /v + i2/v + i3/v [ Potential difference remains same for this case ]
=> i Net = i1 + i2 + i3
Explanation:
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