Question

Three resistors 2 ohm, 2 ohm and r ohm are joined parallel to each other. If
overall resistance of circuit is 0.5 ohm, calculate the value r. If these
resistors are joined with 4 volt battery, calculate total current of the circuit.​

Answer 1

Answer:

r=2ohm

i=8A

Explanation:

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

1/0.5=1/2+1/2+1/r

1/r=1/2-1/2+1/2

1/r=1/2

r=2ohm

v=ir

4=i×0.5

i=4/0.5

i=8A