# What is the current sensitivity?

Comparison between current and voltage sensitivity. vote 0. Current sensitivity of a galvanometer is defined as deflection per unit current, ϕ I = N A B k. Here, is the angular deflection, k is the torsional constant of the spring, and NAB is the magnetic torque per unit current produced in the galvanometer (MCG).
A.

### What is the purpose of the galvanometer?

A galvanometer is an electromechanical instrument for detecting and measuring electric current. The most common use of galvanometers was as analog measuring instruments, called ammeters, used to measure the direct current (flow of electric charge) through an electric circuit.
• #### What is a galvanometer and how does it work?

A galvanometer works as an actuator, by producing a rotary deflection (of a "pointer"), in response to electric current flowing through a coil in a constant magnetic field. They were the first instruments used to detect and measure small amounts of electric currents.
• #### What is the difference between an ammeter and a galvanometer?

Difference Between Galvanometer & Ammeter. The galvanometer is converted into the ammeter by connecting the resistance in parallel with the circuit. And if the resistance is connected in series with a galvanometer, then it is used as a voltmeter. The ammeter is also known as the ampere meter.
• #### What is the use of mirror in galvanometer?

A mirror galvanometer is an electromechanical instrument that indicates that it has sensed an electric current by deflecting a light beam with a mirror. The beam of light projected on a scale acts as a long massless pointer.
B.

### What is the resistance of a galvanometer?

When an electric current passes through the coil, it deflects. The deflection is proportional to the current passed. The galvanometer coil has a moderate resistance (about 100 ohms) and the galvanometer itself has a small current carrying capacity (1 mA).
• #### What is the current sensitivity?

Comparison between current and voltage sensitivity. vote 0. Current sensitivity of a galvanometer is defined as deflection per unit current, ϕ I = N A B k. Here, is the angular deflection, k is the torsional constant of the spring, and NAB is the magnetic torque per unit current produced in the galvanometer (MCG).
• #### Why is Ammeter always connected in series and voltmeter always connected in parallel?

In order for a voltmeter to measure a device's voltage, it must be connected in parallel to that device . This is necessary because objects in parallel experience the same potential difference. n ammeter measures the electric current in a circuit. This is necessary because objects in series experience the same current.
• #### What is the difference between an ammeter and a galvanometer?

Difference Between Galvanometer & Ammeter. The galvanometer is converted into the ammeter by connecting the resistance in parallel with the circuit. And if the resistance is connected in series with a galvanometer, then it is used as a voltmeter. The ammeter is also known as the ampere meter.

Updated: 28th September 2018