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  • In the circuit shown, the value of R in ohm that will result in no current through the 30 V battery, is : (In ohms )                    

In the circuit shown, the value of R in ohm that will result in no current through the 30 V battery, is : (In ohms )

                                 

 

Option: 1

10


Option: 2

25


Option: 3

30


Option: 4

40


Answers (1)

best_answer

From ohms law

V=IR

R- Electric Resistance

 so, i= V/R

i=\frac{50}{20+R}  

The potential drop across R = Potential drop across AB

       

            

\Rightarrow \frac{50}{20+R}.R=30\; \Rightarrow R=30\; \Omega

Posted by

vinayak

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