Question

What is the time period of ballistic galvanometer?

Answer 1

Verified Answer :-

Before first use the ballistic constant of the galvanometer must be determined. This is usually done by connecting to the galvanometer a known capacitor, charged to a known voltage, and recording the deflection. The constant K is calculated from the capacitance C, the voltage V and the deflection d: K=CV/dK=CV/d

where K is expressed in coulombs per centimeter.

In operation the unknown quantity of charge Q (in coulombs) is simply: Q=kd Q=kd.