Class 12PhysicsMoving Charges and MagnetismThe Moving Coil Galvanometer (Sensitivity) and Ammeter and Voltmeter Conversion
MediumWhat is a galvanometer? Give its applications.
(N/A) galvanometer is an electromechanical instrument used for detecting and indicating an electric current.
It works on the principle that a current-carrying coil placed in a magnetic field experiences a magnetic torque.
Applications:
$1$. It is used to detect the presence of small electric currents in a circuit.
$2$. By connecting a low resistance (shunt) in parallel,it can be converted into an ammeter to measure current.
$3$. By connecting a high resistance in series,it can be converted into a voltmeter to measure potential difference.
$4$. It is widely used in laboratory experiments and sensitive electronic measuring instruments.
It works on the principle that a current-carrying coil placed in a magnetic field experiences a magnetic torque.
Applications:
$1$. It is used to detect the presence of small electric currents in a circuit.
$2$. By connecting a low resistance (shunt) in parallel,it can be converted into an ammeter to measure current.
$3$. By connecting a high resistance in series,it can be converted into a voltmeter to measure potential difference.
$4$. It is widely used in laboratory experiments and sensitive electronic measuring instruments.
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Similar Questions
To convert a galvanometer into an ammeter,a shunt of $0.01\,\Omega$ is used. The resistance of the galvanometer coil is $50\,\Omega$ and its maximum deflection current is $20\,mA$. The range of the ammeter is:
Medium
View SolutionAn ammeter reads up to $1\, A$. Its internal resistance is $0.81\, \Omega$. To increase the range to $10\, A$,the value of the required shunt is ............ $\Omega$.
MediumAIEEE 2003
View SolutionAn ammeter, suspected to give inaccurate reading, is connected in series with a silver voltameter. The ammeter indicates $0.54\, A$. A steady current passed for one hour deposits $2.0124\, g$ of silver. If the $E.C.E.$ of silver is $1.118 \times 10^{-3}\, g\, C^{-1}$, then the error in ammeter reading is ................ $A$.
Difficult
View SolutionIn the given figure,an ammeter $A$ consists of a $240 \Omega$ coil connected in parallel to a $10 \Omega$ shunt. The reading of the ammeter is . . . . . . $mA$.
DifficultJEE MAIN 2024
View Solution$A$ galvanometer with $50$ divisions on the scale has a resistance of $25 \Omega$. $A$ current of $2 \times 10^{-4} \text{ A}$ gives a deflection of one scale division. The additional series resistance required to convert it into a voltmeter reading up to $25 \text{ V}$ is $.... \Omega$.
Medium
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