Question

Two identical resistors each of resistance 20 ohm are connected in parallel. This combination, in turn, is connected to a 10 ohm resistor. The equvalent resistance

Answer 1

since the two identical resistors are connected in parallel their equivalent resistance is (20×20) ÷(20+20)= .10.

therefore, 10+10= 20ohms

Answer 2

Hey dear,

◆ Answer-
R' = 20 ohm.

◆ Explaination-
# Given-
R1 = R2 = 20 ohm
R3 = 10 ohm

# Solution-
R1 & R2 are connected in parallel.

Resultant resistance for parallel combination is given by -
1/R = 1/R1 + 1/R2
1/R = 1/20 + 1/20
1/R = 2/20
R = 10 ohm

This R and R3 are connected in series.

Equivalent resistance in series combination is given by -
R' = R + R3
R' = 10 + 10
R' = 20 ohm

Equivalent resistance of overall structure is 20 ohm.

Hope this helps you...