| Assertion (A): In balanced condition, if the galvanometer and the voltage source is interchanged, the balanced condition remains same. |
| Reason (R): The balanced condition of Wheatstone bridge does not depend on the value of the resistances. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is true
Correct Answer: C
Solution :
| Option [c] is correct. |
| Explanation: In balanced condition, if the galvanometer and the voltage source are interchanged, the balanced condition remains same since in both the cases \[{{\operatorname{R}}_{1}}{{R}_{4}}\] remains equal to \[{{\operatorname{R}}_{2}}{{R}_{3}}\]. The assertion is true. |
| The balanced condition of Wheatstone bridge depends on the value of the resistances. \[{{\operatorname{R}}_{1}}{{R}_{4}}\]should be equal to \[{{\operatorname{R}}_{2}}{{R}_{3}}\]. So, if the resistance values are changed, the balanced condition also gets disturbed. So, the reason is false. |
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