Question

State the characteristics of a parallel combination of resistors.
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Answer 1

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Characteristics of a parallel combination of resistors :

(1) The voltage (potential difference) across each of the resistors is the same.

(2) The total current is equal to the sum of the currents through the individual resistors.

(3) The reciprocal of the effective resistance of the combination is equal to the sum of the reciprocals of the individual resistances.

(4) The effective resistance of the combination is less than any of the individual resistances.

(5) The current through each resistor is inversely proportional to the resistance of the resistor.

(6) This combination can be used to decrease the resistance in a circuit.

Answer 2

1. IN PARALLEL COMBINATION OF RESISTORS THE EFFECTIVE I,E TOTAL RESISTANCE IS DECREASED.

2. IN THIS COMBINATION THE POTENTIAL DIFFERENCE ACROSS CIRCUIT IS SAME.

3. IN THIS COMBINATION CURRENT VARIES ACROSS THE CIRCUIT .

4. TOTAL RESISTANCE CALCULATED BY :

1/R = 1/ R¹ + 1/R².......AND SO ON