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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Note that whatever current is flowing in the circuit being measured that the current will always split 3: Thus, to measure large currents it is converted into an ammeter.
An ammeter is a device used for measuring large electric currents in circuits. Converting a galvanometer into an Ammeter Ask Question. The galvanometer coil has a moderate resistance about ohms and the galvanometer itself has a small current carrying capacity 1 mA. A galvanometer can detect only galvanomerer currents. Now, a shunt resistance is added in parallel. 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.
For this purpose, it is put in series with the circuit in which the current is to be measured. To convert the given galvanometer of known resistance and figure of merit into an ammeter of desired range and to verify the same. 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 an measure current when the deflection voltmeeter the needle is going to always be maximum due to the passage of Ig current.
Whiskeyjack 3, 2 17 Galvanometer is too sensitive therefore is modified to be used to measure current instead of only detect it.
It is represented by the symbol k and is given by the equation.
What is a Galvanometer? Conversion of Galvanometer to Ammeter. Post as a guest Name. Sign up or log in Sign up using Google. Vkltmeter 1 Januaryfrom amrita.
Sign up using Facebook. Now Rs is of such a value that Ig passes through the galvanometer and the remaining current I-Ig passes through the shunt resistance.
shunt – Converting a galvanometer into an Ammeter – Electrical Engineering Stack Exchange
It can be converted into an ammeter by connecting a low resistance called shunt resistance in parallel to the galvanometer. The student learns the following concepts: For the ammeter rated for 1 A, the Ig max value will be reached only when you are allowing 1 A through the ammeter. Let G be the resistance of the galvanometer and Ig be the current for full scale deflection in the galvanometer, the value of the shunt resistance required to convert the galvanometer into an ammeter of 0 to I ampere is.
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 Remember that the galvanometer doesn’t “hog” all the current if the current is a low value.
What is an Ammeter? The current always splits inversely to the ratio of the reaistances. When an electric current passes through the coil, it deflects. The current for full scale deflection through it is lets say Ig. Remember that the galvanometer doesn’t “hog” all the current if the current is a low value. Ig is always passing through the galvanometer so how does the ammeter really work and give us current in amperes? This is what I know so far.
Conversion of Galvanometer to Ammeter (Theory) : Class 12 : Physics : Amrita Online Lab
Ruqaiya Naeem 13 3. If Ig is less than Ig maxthe needle will stay somewhere in between. It has a coil pivoted or suspended between concave pole faces of a strong laminated horse shoe magnet. Email Required, but never voltmerer. What is figure of merit of a galvanometer?
Deflection of needle is not always going to be maximum. For the ammeter rated A, Ig max will be reached when voltmetet current is A.
Maximum deflection occurs at Ig max. When you are designing the ammeter, you need to select a value of Rs depending upon the max current you intend to measure. The figure of merit of a galvanometer is defined as the current required in producing a unit deflection in the scale of the galvanometer. Anyway, I do understand how a galvanometer galvanometter converted into an ammeter but it’s logic doesn’t seem to add up.
I conversioon 12th grader just in case. Where E is the e. Home Questions Tags Users Unanswered.