- Books Name
- SonikaAnandAcademy Science Book
- Publication
- SonikaAnandAcademy
- Course
- CBSE Class 10
- Subject
- Science
- Books Name
- Iti Shree Science Book
- Publication
- Vaishnav Publication
- Course
- CBSE Class 10
- Subject
- Science
Resistors in series
When two or more resistors are joined in series, then their total resistance is given by the formula-
RS = R1 + R2 + R3
The current will remain the same through all resistors. Total voltage is given by-
V = V1 + V2 + V3
Voltage across each resistor is given as –
V1 = lR1
V2 = lR2 [V1 + V2 + V3 = V]
V3 = lR3V = lR
⇒ V = lR1 + lR2 + lR3
lR = l(R1+ R2 + R3)
R = R1 + R2 + R3
Resistors in parallel
In this case, voltage is the same across each resistor and is equal to the applied voltage. The total current is given as-
V/R = V/R1 + V/R2 + V/R3
1/Rp = 1/R1 + 1/R2 + 1/R3
Advantages of Parallel Combination over Series Combination
If one component fails in a series combination, then the complete circuit is broken and no component can work properly. Different appliances need different currents.