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Why is resistance more in series combina...

Why is resistance more in series combination of resistors ?

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In series combination of resistors, the effective length of the conducting path increase and as such resistance increase as `R prop l`.
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Why is resistance less in parallel combination of resistors ?

(a) Why does resistance increase in a series combination of resistors ? (b) Why does resistance decrease in a parallel combination of resistors ?

Knowledge Check

  • The equivalent resistance of series combination of four equal resistors is S. If they are joined in parallel, the total resistance is P. The relation between S and P is given by S = nP. Then the minimum possible value of n is

    A
    12
    B
    14
    C
    16
    D
    10

  • The equivalent resistance in series combination is

    A
    smaller than the largest resistance
    B
    larger than the largest resistance
    C
    smaller than the smallest resistance
    D
    larger than the smallest resistance

  • Which of the following is TRUE for a series combination of resistors?

    A
    Voltage remains same onl
    B
    Current remains same onl
    C
    Both current and voltage remains same
    D
    Neither current nor voltage remains same

    • Similar Questions

    Explore conceptually related problems

    What is Ohm's law ? How is it represented graphically ? Derive an expression for the resultant resistance of a series combination of resistors.

    The resistance of the series combination of two resistors is S. When they are joined in parallel, the equivalent resistance becomes P. If S = nP, then the minimum possible value of n is

    Two resistors X and Y of resistances 2 omega and 3 omega respectively are first joined in parallel and then in series. In each case the voltage supplied is 5 V. (i) Draw circuit diagrams to show the combination of resistors in each case. (ii) Calculate the voltage across the 3 Q resistor in the series combination of resistors.

    (a) How does the current divide itself in a parallel combination of resistors ? (b) How does the pd divide itself in a series combination of resistors ?

    Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistance of 2 Omega in series with a combination of two resistors ( 4 Omega each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the 2 Omega resistor be the same as that across the parallel combination of 4 Omega resistors ? Give reason.

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