Question

when two resistors are connected in parallel R1=10 ohm and R2=5 ohm find the value of resistance in parallel with that value, connect that resistance to other resistor Rs=5 ohm. find the net value of Rs.

Answer 1

R1+R2+ - - - - - - - +Rs............( resistance in series)

10+5.........................+5

R1+R2=Rs

10+5=5Rs

15=5Rs

15/5=Rs

3=Rs

Answer 2

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By the rule of resistance in series :

R1+R2+R3+....................+Rs.......(Resistance in series)

R1=10 and R2=5...........Rs=5 ...........(given)

Rs=R1+R2

5Rs=10+5

5Rs=15

Rs=15/5

Rs=3