The galvanometer cannot as such be used as an ammeter to measure the value of current in a given circuit. The following reasons are I. galvanometergives full scale deflection for a small current. II. galvanometer has a large resistance. III. a linear scale cannot be designed so that I propto φ. IV. a galvanometer can give inaccurate values.

Question

The galvanometer cannot as such be used as an ammeter to measure the value of current in a given circuit. The following reasons are I. galvanometergives full scale deflection for a small current. II. galvanometer has a large resistance. III. a linear scale cannot be designed so that I propto φ. IV. a galvanometer can give inaccurate values. (A) I and IV (B) II and III (C) I and II (D) III and IV

Tardigrade Admin · Accepted Answer

I Galvanometer is a very sensitive device, it gives a full scale deflection for a current of the order of

μ A

.
II For measuring 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.

I and IV

II and III

I and II

III and IV

I Galvanometer is a very sensitive device, it gives a full scale deflection for a current of the order of μA. II For measuring 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.

I Galvanometer is a very sensitive device, it gives a full scale deflection for a current of the order of $μ A$ .
II For measuring 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.