Question

Three resistance of 2W, 3Wand 5Ware connected in the electric circuit. Calculate the


(1) Maximum effective resistance

(2) Minimum effective resistance​

Answer 1

Answer:

1) max effective resistance = 10

2) min effective resistance = 0.97

Explanation:

1) for max resistance, all three resistance should be attached in series combination

therefore, R=R1+R2+R3

R= 2+3+5= 10

2) for min effective resistance, all three resistance should be attached in parallel combination

1/R= 1/R1 +1/R2+1/R3

1/R= 1/2+1/3+1/5 (taking LCM of 2,3,5)

1/R= (15+10+6)/30

1/R=31/30

R= 30/31

R= 0.97