Question

The reduction factor K of a tangent galvanometer is written on the instrument. The manual says that the current is obtained by multiplying this factor to tan θ. The procedure works well at Bhuwaneshwar. Will the procedure work if the instrument is taken to Nepal? If there is same error, can it be corrected by correcting the manual or the instrument will have to be taken back to the factory?

Answer 1

Yes, the technique would work if the instrument is taken to Nepal, as the current can be measured at a location by multiplying that place's reduction factor K with tanθ.

Explanation:

• In our case, we will take Nepal's tanθ value, as tanθ can vary from area to area. From the mathematical Method of  $\frac{B}{B_{H}}$   tan is calculated at any place  where the upper magnetic field is B, and where BH is the horizontal portion of the magnetic field of Earth.
• So for correction we do not need to take the instruction or the machine back to the factory.