Compare between moving coil galvanometer and moving magnet galvanometer
Answers
it is abbreviated as M.C.G.
The deflection in Moving Coil Galvanometer is directly proportional to current flowing through it.
Moving Coil Galvanometer is divided basically in two parts: Moving Coil Galvanometer and pivoted type Moving Coil Galvanometer.
Moving magnet galvanometer:
It is also known as tangent galvanometer
The current flowing through the tangent galvanometer is directly proportional to the deflection in the coil.
It is less sensitive than moving coil galvanometer
Answer:
Moving coil-Galvanometer Moving Magnet Galvanometer
(i) In it powerful magnet is used. Due to this there is no effect of external magnetic filed on it. (i) Its controlling region is earth's region whose value is very small. So, there is a big effect of external magnetic field on it. Due to this accurate defletion value is not found.
(ii) It can be put in any direction. (ii) It is essential to bring it is magnetic meridian
(iii) We do not get accurate value of its constant by replacing it place to other. (iii) By the replacing it one place to other its constant (k BH/G) value is increased as the value of BH is different at different places.
(iv) Current of 10-9 amp. can be measured easily by it. (iv) Current of only 10-5 amp. can be measured by it.