logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class12  >>  Current Electricity
0 votes

For what value of $R$ will the current passing through the $4\: ohm$ resistor is zero

 

$\begin {array} {1 1} (A)\;1\Omega & \quad (B)\;2\Omega \\ (C)\;3\Omega & \quad (D)\;4\Omega \end {array}$

 

Can you answer this question?
 
 

1 Answer

0 votes
Potential difference across the $ 4\: ohm$ resistor is zero $ \Rightarrow$ potential difference across
$2\: ohm $ resistor is $4V$ and across $R$ will $-2V$.
The current through the 2 ohm resistor is 2A.
The KVL equation for the big loop is
10 - 2i -iR - 4 = 0
On solving the $KVL$ equations, we get $ R = 1 \: ohm$.
Ans : (A)

 

answered Feb 10, 2014 by thanvigandhi_1
edited Sep 10, 2014 by thagee.vedartham
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...