Class 12PhysicsMoving Charges and MagnetismThe Moving Coil Galvanometer (Sensitivity) and Ammeter and Voltmeter Conversion
EasyGive the uses of a galvanometer.
(N/A) galvanometer is an electromechanical instrument used for detecting and indicating an electric current. Its primary uses are:
$1$. Detection of Current: It is used to detect the presence of a small electric current in a circuit.
$2$. Conversion to Ammeter: By connecting a low resistance (shunt) in parallel with the galvanometer,it can be converted into an ammeter to measure the magnitude of current in a circuit.
$3$. Conversion to Voltmeter: By connecting a high resistance in series with the galvanometer,it can be converted into a voltmeter to measure the potential difference between two points in a circuit.
$1$. Detection of Current: It is used to detect the presence of a small electric current in a circuit.
$2$. Conversion to Ammeter: By connecting a low resistance (shunt) in parallel with the galvanometer,it can be converted into an ammeter to measure the magnitude of current in a circuit.
$3$. Conversion to Voltmeter: By connecting a high resistance in series with the galvanometer,it can be converted into a voltmeter to measure the potential difference between two points in a circuit.
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Similar Questions
$A$ galvanometer has $30$ divisions and a current sensitivity of $20 \, \mu A$ per division. Its resistance is $25 \, \Omega$. How will you convert this galvanometer into a voltmeter of $1 \, V$ range? (Find the series resistance in $\Omega$)
Medium
View Solution$A$ moving coil galvanometer of resistance $100 \ \Omega$ shows full-scale deflection when a current of $100 \ \mu A$ passes through it. If it is intended to show full-scale deflection when a current of $1 \ mA$ passes through it,the value of shunt resistance in ohms to be connected to the galvanometer is:
DifficultTS EAMCET 2002
View Solution$A$ voltmeter has a resistance of $G \ \Omega$ and a range of $V \ \text{volt}$. The resistance required in series to convert it into a voltmeter of range $nV \ \text{volt}$ is . . . . . . .
An ammeter has a range of $1 \, A$ without a shunt. The range can be varied by using different shunt resistances. The graph between shunt resistance $(S)$ and range $(I)$ will have the nature of which curve shown in the figure?
Medium
View SolutionDefine the function of the small cylinder in the construction of a galvanometer.
Easy
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