NEETPhysicsCurrent Electricity
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Resistance of ammeter is less than resistance of milliammeter, (If made from same galvanometer) Reason (R) : Value of shunt resistance in case of ammeter is more than a milliammeter. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A).
- BBoth (A) and (R) are true and (R) is NOT the correct explanation of (A).
- C(A) is true but (R) is false.
- D(A) is false but (R) is true.
Correct answer
C. (A) is true but (R) is false.
Step-by-step solution
( aligned & S ( i - i ₀ )= i ₀ G & i = i ₀ (1+ G ~S ) & As S i aligned ) ( ) Value of shunt is more in mili ammeter. ( aligned & R _ net = GS ~S + G = G 1+ G ~S & ~S R _ net & R _ mili ammeter > R _ ammeter aligned )