Question

show how you would connect three resistors each of resistance 3 ohm so that the combination has a resistance of (i) 1 ohm(ii) 4.5 ohm

Answer 1

Answer:

In Parallel :-

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

R = 1/3 + 1/3 + 1/3 = 1

and fo 4.5 ohm two 3 ohm in parallel and 1 3 ohm in series

1/R*=1/3+1/3

R*=3/2

Req=3/2+3

Req=4.5