Duration: 3:44

7 views

0

Two sources of equal emfs are connected in series. This combination is connected to an external resistance \( R \). The internal resistances of the two sources are \( r_{1} \) and \( r_{2}\left(r_{1}r_{2}\right) \) . If the potential difference across the source of internal resistance \( r_{1} \) is zero, then the value of \( R \) will be
\( (2022) \)
(a) \( r_{1}-r_{2} \)
(b) \( \frac{r_{1} r_{2}}{r_{1}+r_{2}} \)
(c) \( \frac{r_{1}+r_{2}}{2} \)
(d) \( r_{2}-r_{1} \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live