Answer: (2) Directly proportional to the number of turns in the coil
A moving coil galvanometer is an instrument which is used to measure electric currents. It is a sensitive electromagnetic device which can measure low currents even of the order of a few microamperes.
Moving-coil galvanometers are mainly divided into two types:
- Suspended coil galvanometer
- Pivoted-coil or Weston galvanometer
For moving coil galvonometer
\(\begin{array}{l}theta = frac{NBAI}{k}\end{array} \)
Where,
- θ = Defelction of the galvanometer
- N = Number of turns
- B = Magnetic feild
- I = Current in the coils of the galvanometer
- k = Torsional constant of the spring
