Question 272: 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:

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
$$ \Rightarrow $$ $$r = {1 \over 2}\Omega $$

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: