How can we convert galvanometer into voltmeter?
A galvanometer can be converted into a voltmeter by connecting a large resistance in series to the galvanometer which is shown in diagram. Let G and R be the resistance of a galvanometer and a conductor connected in series with it respectively.
Can a galvanometer be used to measure current?
No, a galvanometer as such can not be used for measuring current as it is a very sensitive instrument as it shos full scale deflection even for a very small current.
Is galvanometer and voltmeter the same?
The main comparison between galvanometer and voltmeter is that a galvanometer is a type of device which has parts that move in response to an electric current, while in a voltmeter is a device that is used to measure the potential difference between two points in a circuit.
Is ammeter a galvanometer?
A galvanometer can be turned into an ammeter by parallely connecting a resistance in the electric circuit. It can be used as a voltmeter when resistance is connected in series with it. Ammeter is used to measure the magnitude of current….
|Difference Between Ammeter and Galvanometer|
Is a galvanometer a voltmeter?
A galvanometer can function as a voltmeter when it is connected in series with a large resistance R. The value of R is determined by the maximum voltage that will be measured. Suppose you want 10 V to produce a full-scale deflection of a voltmeter containing a 25-Ω galvanometer with a 50-μA sensitivity.
How is a galvanometer converted into a voltmeter?
Explain how you will convert a galvanometer into a voltmeter. Voltmeter is an instrument used to measure potential difference between the two ends of a current carrying conductor. A galvanometer can be converted in to a voltmeter by connecting a high resistance in series with it. The scale is calibrated in volt.
How is the scale calibrated on a galvanometer?
The scale is now calibrated in volt and the range of voltmeter depends on the values of the resistance connected in series i.e. the value of resistance is so adjusted that only current Ig produces full scale deflection in the galvanometer.
Why does the galvanometer have a low resistance?
As a result, when large current flows in a circuit, only a small fraction of the current passes through the galvanometer and the remaining larger portion of the current passes through the low resistance. The low resistance connected in parallel with the galvanometer is called shunt resistance.
Which is the maximum current that can be passed through a galvanometer?
Let I g be the maximum current that can be passed through the galvanometer. The current I g will give full scale deflection in the galvanometer. Since the galvanometer and shunt resistance are parallel, potential is common. The shunt resistance is very small because I g is only a fraction of I.