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 equivalent resistance of the combination will be

Answer 1

Equivalent resistance of the 20 ohm resistors:

= (20 x 20)÷(20 + 20)

= 400 ÷ 40

= 10 ohm

Now final resistance is:

10 + 10 ohm = 20 ohm