Question 347: Current Electricity

Question

In the given circuit, an ideal voltmeter
connected across the 10$\Omega $ resistance reads 2V.
The internal resistance r, of each cell is:
![](https://imagex.cdn.examgoal.net/7kejek18l58dm/9e6df47a-a1e3-420f-b998-4631d9db5696/021f10a0-e4b3-11e9-a7bc-b7b08ce8d541/file-7kejek18l58dn-308w.jpg)

Accepted Answer

For the given circuit
Given that V
AB
= 2 V
$ 	herefore $ I = ${2 \over {15}} + {2 \over {10}} = {1 \over 3}A$
Also I(2r + 2) = 1.5 + 1.5 Ã¢ÂÂ V
AB
$ \Rightarrow $ 2r + 2 = (3Ã¢ÂÂ2)3
$ \Rightarrow $ $r = {1 \over 2}\Omega $
![](https://imagex.cdn.examgoal.net/7kejek18l6id4/037216b7-8978-49cb-807c-29000f22f68c/25a4ff80-e4b3-11e9-a7bc-b7b08ce8d541/file-7kejek18l6id5-268w.jpg)

Answer

1.5 $\Omega $

Answer

1 $\Omega $

Answer

0.5 $\Omega $

Answer

0 $\Omega $

Current Electricity

In the given circuit, an ideal voltmeter connected across the 10\Omega resistance reads 2V. The internal resistance r, of each cell is:

Choose the correct answer: