AIPMT PRELIMS2008Physics-Current Electricity
AIPMT PRELIMS 2008 Physics Galvanometer MCQ Question
Type: MCQ-numerical-Medium-Class 12
A galvanometer of resistance 50 Ω is connected to a battery of 3V along with a resistance of 2950 Ω in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be -
A
6050 Ω
B
4450 Ω
C
5050 Ω
D
5550 Ω
Correct Answer
Option B
Detailed Explanation
The deflection is proportional to the current, which is inversely proportional to the total resistance. To reduce the deflection, the total resistance must be increased.
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