Conversion of a Galvanometer into Ammeter and Voltmeter. Voltmeter: It is a high resistance galvanometer, used to measure potential. Conversion of a galvanometer into voltmeter & Ammeter. 1. KAMALJEETH INSTRUMENTS. Experiment S. GALVANOMETER AND ITS. CONVERSION . Voltmeter and Ammeter. Objective: (a) To convert a galvanometer into a voltmeter reading up to V volts and calibrate it. (b) To convert a galvanometer into an.
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The figure of merit of a converaion is defined as the current required in producing a unit deflection in the scale of the galvanometer.
Galvanometer Ammeter Figure of merit Shunt resistance How a galvanometer can be converted into an ammeter.
Post as a guest Name. Maximum deflection occurs at Ig max. Thus, to measure large currents it is converted into an ammeter. An ammeter is a device used for measuring large electric currents in circuits.
A galvanometer is a device used to detect feeble electric currents in a circuit.
Retrieved 1 Januaryfrom amrita. Sign up using Email and Password. Conversion of Galvanometer to Ammeter. When an electric current passes through the coil, it deflects.
This is what I know so far. Sign up using Facebook.
Galvanometer is too sensitive therefore is modified to be used to measure current instead of only detect it. For ex – an ammeter which can measure current up to 1 A will use a larger value of Rs as compared to an ammeter which can voltmteer a current up to A.
If you pass a current higher than rated value eg – 2 A through 1 A rated falvanometerthe needle will show full deflection and there galvnaometer no way of knowing the exact value of current passing through it. I understand why the shunt resistance has to be of a smaller value and the resistance of voltmeter has to be of a really greater value but what I fail to comprehend is xonversion can we successfully measure current when the deflection of the needle is going to always be maximum due to the passage of Ig current.
Note that whatever current is flowing in the circuit being measured that the current will always split 3: Anyway, I do understand how a galvanometer is converted into an ammeter but it’s logic doesn’t seem to add up.
Conversion of Galvanometer to Ammeter (Theory) : Class 12 : Physics : Amrita Online Lab
It is represented by the symbol k and is given by the equation. Email Required, but never shown. I understand why the shunt resistance has to be of a smaller value and the resistance of voltmeter has to be of a really greater value but what I fail to comprehend is how can we successfully measure current when the deflection of the needle is going to always be maximum due to the passage of Ig current which is the current that causes maximum deflection.
Whiskeyjack 3, 2 17 Now Rs is of such a value that Ig passes through the galvanometer and the remaining current I-Ig passes through the shunt resistance.
It can be converted into an ammeter by connecting a low resistance called shunt resistance in parallel to the galvanometer. Now, a shunt resistance is added in parallel. What is an Ammeter? Converting a galvanometer into an Ammeter Ask Question.
What is a Galvanometer?
What is figure of merit of a galvanometer? If Ig is less than Ig maxthe needle will stay somewhere in between.
The deflection is proportional to the current passed. You understood this part wrong.