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  • Two non-ideal unidentical batteries are connected in parallel with positive terminals. Consider the following statements: A. The equivalent emf is smaller than either of the two emfs.

Two non-ideal unidentical batteries are connected in parallel with positive terminals. Consider the following statements:

A. The equivalent emf is smaller than either of the two emfs.

B. The equivalent internal resistance is smaller than either of the two internal resistances.
 

Option: 1

Both A and B are correct


Option: 2

A is correct but B is wrong


Option: 3

B is correct but A is wrong


Option: 4

Both A and B are wrong


Answers (1)

best_answer

\mathrm{E_{e q}=\frac{E_1 / r_1+E_2 / r_2}{1 / r_1+1 / r_2}=\frac{E_1 r_2+E_2 r_1}{r_1+r_2}=E_1\left[\frac{r_2+r_1\left(E_2 / E_1\right)}{r_1+r_2}\right]}

Therefore, \mathrm{E_{e q}} can be greater than, less than or equal to \mathrm{E_{1}} depending upon the condition whether

\mathrm{E}_2>\mathrm{E}_1, \mathrm{E}_2=\mathrm{E}_1 \text { or } \mathrm{E}_2<\mathrm{E}_1

Posted by

vishal kumar

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