Question 466: Current Electricity

Question

In the given figure switches S1 and S2 are in open condition. The resistance across ab when the switches S1 and S2 are closed is _____________ $$\Omega$$.

Accepted Answer

When switch S
1
and S
2
are closed
R
ab
= $${{12 	imes 6} \over {12 + 6}} + 2 + {{6 	imes 12} \over {6 + 12}}$$
= $${{72} \over {18}} + 2 + {{72} \over {18}} = 4 + 2 + 4 = 10\Omega $$

Current Electricity

In the given figure switches S1 and S2 are in open condition. The resistance across ab when the switches S1 and S2 are closed is _____________ $\Omega$.

Choose the correct answer: