| What should be value of E for which galvanometer shows no deflection: |
 |
A) 10 V
B) 5V
C) 15 V
D) 20 V
Correct Answer: A
Solution :
| \[\frac{E-10}{20}=I\] |
 |
| \[10=E-\frac{E-10}{20}\times 5\] |
| \[40=4E-E+10\] |
| \[30=3E\] |
| \[E=10V.\] |
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