In the meter bridge circuit, the length AB for Null deflection in galvanometer, is 50 cm. Value of resistance r, is a. 10 Ω b. 15 Ω c. 30 Ω d. 20 Ω
By BYJU'S Exam Prep
Updated on: September 13th, 2023
We know that
R1x/ (R1 + x) = R2
It is asked in the question that In the meter bridge circuit, the length AB for Null deflection in galvanometer, is 50 cm. And it is given that
R1 = 15 Ω
R2 = 10 Ω
Table of content
Substituting these values
15x/ (15 + x) = 10
By further calculation
15x = 10 (15 + x)
15x = 150 + 10x
15x – 10x = 150
5x = 150
Dividing both sides by 5
x = 30 Ω
Therefore, the value of resistance r is 30 Ω.
Summary:
In the meter bridge circuit, the length AB for Null deflection in the galvanometer is 50 cm. Value of resistance r is
In the meter bridge circuit, the length AB for Null deflection in the galvanometer is 50 cm. The value of resistance r is 30 Ω.
