VOLTAGE AND CURRENT MEASUREMENT USING AMMETER AND VOLTMETER

VOLTAGE AND CURRENT MEASUREMENT USING AMMETER AND VOLTMETER

Aim :

         To measure the voltage and current of a given DC circuit.

APPARATUS REQUIRED:

THEORY:

Voltmeter: Voltmeter is always used to measure supply voltage and connected in parallel with supply. If the voltmeter is connected series to the supply it will no reading for DC measurement moving coil type voltmeter and AC measurements used moving iron instruments.

Ammeter: Ammeter is always used to measure supply current and connected in series with the load. It should never be connected in parallel to the supply otherwise it will burn out, for DC measurement Moving Coil type and AC measurements used moving iron instruments.

PROCEDURE

            Make the connections as per the connection diagram, switch on the supply, when the lamp will glow note readings of voltmeter and ammeter. Switch off the supply and replace the another lamp, then again note the readings and tabulate.

CIRCUIT DIAGRAM

   TABULAR COLUMN

RESULT:  The voltage and current of a given circuit is measured with different load.

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