Given below are two statements labelled as Assertion (A) and Reason (R

1.	Given below are two statements labelled as Assertion (A) and Reason (R) Assertion (A): On Increasing the current sensitivity of a galvanometer by increasing the number of turns, may not necessarily increase its voltage sensitivity. Reason(R ): The resistance of the coil of the galvanometer increases on increasing the number of turns. Select the most appropriate answer from the options given below: (i) Both A and R are true and R is the correct explanation of A (ii) Both A and R are true but R is not the correct explanation of A. (iii) A is true but R is false. (iv) A is false and R is also false.
Answer» Answer is (i) Both A and R are true and R is the correct explanation of A When we increase current sensitivity by increasing no. of turns, then resistance of coil also increases. So increasing current sensitivity does not necessarily imply that voltage sensitivity will increase because Vg = \(\frac{I_g}{R}\) ∴ if I_g ↑ & R ↑ by different amounts, then V_g may increase or decrease.

Given below are two statements labelled as Assertion (A) and Reason (R) Assertion (A): On Increasing the current sensitivity of a galvanometer by increasing the number of turns, may not necessarily increase its voltage sensitivity. Reason(R ): The resistance of the coil of the galvanometer increases on increasing the number of turns. Select the most appropriate answer from the options given below: (i) Both A and R are true and R is the correct explanation of A (ii) Both A and R are true but R is not the correct explanation of A. (iii) A is true but R is false. (iv) A is false and R is also false.

Answer»

Answer is (i) Both A and R are true and R is the correct explanation of A

When we increase current sensitivity by increasing no. of turns, then resistance of coil also increases.

So increasing current sensitivity does not necessarily imply that voltage sensitivity will increase because Vg = \(\frac{I_g}{R}\)

∴ if I_g ↑ & R ↑ by different amounts, then V_g may increase or decrease.