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प्रश्न
When do you say that the resistors are connected in this way? Draw a circuit diagram.
उत्तर
Resistors connected in series: - If the number of resistance are connected one after another in such a way that the same current flows through each resistance, then the arrangement is called resistance in series.
Let R1, R2, and R3 are three resistances connected in a series combination and let be their effective resistance in the circuit.
Let V1, V2, and V3 be the P.D. across resistances R1, R2, and R3 respectively. Let ‘V’ be the P.D. of the cell. Let ‘I’ be the current flow through each resistance.
According to Ohm’s Law,
Conclusion:
If the resistors are connected in series then.
- In a circuit, the current is the same in every part of the circuit.
- The resistance of the combination of resistors is equal to the sum of the individual resistors.
- The total voltage across the combination is equal to the sum of the voltage drop across the separate resistors.
- The effective resistance in a series combination is greater than the individual resistances.
- This combination is used to increase resistance in a circuit.
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संबंधित प्रश्न
If the equivalent resistance is to be increased, then the number of resistances should be connected in
- Series
- Parallel
- Mixed arrangement
- None of the above
Find the equivalent resistance between points A and B.
Find the equivalent resistance between points A and B
If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combination is :
(a) 0.1 Ω
(b) 10 Ω
(c) 20 Ω
(d)40 Ω
The diagram below shows part of a circuit:
If this arrangement of three resistors was to be replaced by a single resistor, its resistance should be:
(a) 9 Ω
(b) 4 Ω
(c) 6 Ω
(d) 18 Ω
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