Question

Current through the external resistance R =4 ohm as shown in the following circuit is​

Answer 1

Answer:

Net voltage across 4 ohm resistor is 10 volt bcoz both the r opposite to each other so (20-10).

Now, i = 10/4 = 2.5

Answer 2

Answer:

I=0 A

Explanation:

For cells in parallel,

Eeff =    $\frac{E1R2 + E2R1}{R1+R2}$

       =  $\frac{10(4) - 20(2)}{6}$

       =    $\frac{40-40}{6}$

       = 0

Current through resistor R,

I = $\frac{Eeff}{R + req}$

 = $\frac{0}{R + req}$

I = 0