Question

How can you convert a galvanometer into a voltmeter?

Answer 1

Step 1: Voltmeter

A voltmeter is an electrical instrument that is used to measure the potential difference present across a current-carrying conductor.

Step 2: Galvanometer

1. A galvanometer is an electrical instrument used for the detection and measurement of currents and charges.
2. A moving coil is suspended in the magnetic field of a permanent magnet.
3. When current passes through the coil it experiences a torque and rotates until deflecting torque is balanced by the restoring torque of the suspension fiber.
4. The angle of deflection gives the measure of current.

Step 3: Voltmeter from Galvanometer

1. Ammeters and voltmeters are the modified forms of the galvanometers
2. By connecting a high resistance in series connection with a galvanometer, it can be converted into a voltmeter.
3. The resistance is connected in series with the galvanometer to convert it into a voltmeter in order to get a maximum resistance.
4. In this case, the scale of the instrument will change to volt $\left(v\right)$.
5. The range of the voltmeter is decided by the value of the resistance connected in series with the galvanometer.
6. In general, the value of resistance connected in series to the galvanometer must be very high so that errors can be prevented while recording the reading.