Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Hard-Class 12
A galvanometer is modified into an ammeter by connecting a shunt resistance of value 0.1 Ω in parallel with it. If the galvanometer has a resistance of 10 Ω, what is the effective resistance of the ammeter?
A
0.099 Ω
B
0.101 Ω
C
0.090 Ω
D
10.1 Ω
Correct Answer
Option A
Detailed Explanation
The effective resistance of the ammeter is calculated using the formula for parallel resistors: 1/R = 1/Rg + 1/Rs, where Rg = 10 Ω and Rs = 0.1 Ω. This gives an effective resistance of approximately 0.099 Ω.
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