State the underlying principles of working of a moveing coil galvanometer. Write the two reasons why a galvonmeter cannot be used as such to measure current in a given circuit.Name any two factors on which that current sensitivity of a galvanometer depends.

State the underlying principles of working of a moveing coil galvanome

1.	State the underlying principles of working of a moveing coil galvanometer. Write the two reasons why a galvonmeter cannot be used as such to measure current in a given circuit.Name any two factors on which that current sensitivity of a galvanometer depends.
Answer» Solution :Principle of working of a moveing coil galnometer : The working is bassed on the fact that current CARRYING coil SUSPENDED in a magnetic field experience a torque. (ii)The galvonmeterf cannot be used to measure the value of the current in a GIVEN circuit due to following two reasons: (a) Galvanometer is a very DEVICE, its gives a full scale deflection for a current of the order of `muA`. (b). Fing currents, the galvanometer has to be connected in series, and as it has a large resistance, this will change the value of the current in the circuit. (iii) The current sensitivity of the galvanometer depends upon the number of truns N and cross SECTION area of the coil A.

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State the underlying principles of working of a moveing coil galvanometer. Write the two reasons why a galvonmeter cannot be used as such to measure current in a given circuit.Name any two factors on which that current sensitivity of a galvanometer depends.

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