Two resistors of 5.0 and 9.0 ohms are connected inparallel. a
4.0 ohm resistor is then connected in series withthe parallel
combination. a 6.0v battery is then connected tothe series-parallel
combination. what is the current throughthe 9.0 ohm resistor?

The current through is 0.297 A

Solution:

As per the question:

V = 6.0 V

Now, from the given circuit:

and are in parallel

Thus

Now, the is in series with :

Now, to calculate the current through :

where

I = circuit current

Now,

Voltage across , V':

Now, current through , I' :

increase masses, decrease separation