| ASSERTION: In ammeter, current in shunt is always greater than current in galvanometer. |
| REASON: Value of shunt resistance is negative if current in shunt is less than current in galvanometer. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
The required value of shunt galvanometer is converted into ammeter is given by \[S=\frac{{{I}_{g}}G}{I-{{I}_{g}}}\] For \[I<{{I}_{g}}\], the above formula gives negative value of S, which is not possible. Therefore current in Shunt is always greater than current in galvanometer for positive value of shunt resistance.
You need to login to perform this action.
You will be redirected in
3 sec
