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- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electricity_and_Magnetism_(Tatum)/10%3A_Electromagnetic_Induction/10.04%3A_Ballistic_Galvanometer_and_the_Measurement_of_Magnetic_FieldA galvanometer is similar to a sensitive ammeter, differing mainly in that when no current passes through the meter, the needle is in the middle of the dial rather than at the left hand end. A galvano...A galvanometer is similar to a sensitive ammeter, differing mainly in that when no current passes through the meter, the needle is in the middle of the dial rather than at the left hand end. A galvanometer is used not so much to measure a current, but rather to detect whether or not a current is flowing, and in which direction. In the ballistic galvanometer, the motion of the needle is undamped, or as close to undamped as can easily be achieved.
- https://phys.libretexts.org/Bookshelves/University_Physics/Book%3A_Introductory_Physics_-_Building_Models_to_Describe_Our_World_(Martin_Neary_Rinaldo_and_Woodman)/21%3A_The_Magnetic_Force/21.06%3A_ApplicationsA needle is attached to the coil, and the deflection of the needle, proportional to the current in the coil, is then a measure of the current through the coil. Once the coil has reached a position whe...A needle is attached to the coil, and the deflection of the needle, proportional to the current in the coil, is then a measure of the current through the coil. Once the coil has reached a position where its magnetic dipole moment vector is parallel to the magnetic field, the direction of the current is reversed, so that the coil continues to feel a torque for another half turn, until the direction of the current is reversed again.
- https://phys.libretexts.org/Bookshelves/University_Physics/Physics_(Boundless)/20%3A_Circuits_and_Direct_Currents/20.4%3A_Voltmeters_and_AmmetersVoltmeters and ammeters are used to measure voltage and current, respectively.
- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Introductory_Physics_II_(1112)/06%3A_Resistive_Networks/6.07%3A_Circuits_Bioelectricity_and_DC_Instruments/6.7.05%3A_DC_Voltmeters_and_AmmetersVoltmeters measure voltage, whereas ammeters measure current.
- https://phys.libretexts.org/Courses/Berea_College/Introductory_Physics%3A_Berea_College/21%3A_The_Magnetic_Force/21.06%3A_ApplicationsA needle is attached to the coil, and the deflection of the needle, proportional to the current in the coil, is then a measure of the current through the coil. Once the coil has reached a position whe...A needle is attached to the coil, and the deflection of the needle, proportional to the current in the coil, is then a measure of the current through the coil. Once the coil has reached a position where its magnetic dipole moment vector is parallel to the magnetic field, the direction of the current is reversed, so that the coil continues to feel a torque for another half turn, until the direction of the current is reversed again.
- https://phys.libretexts.org/Bookshelves/University_Physics/Physics_(Boundless)/22%3A_Induction_AC_Circuits_and_Electrical_Technologies/22.1%3A_Magnetic_Flux_Induction_and_Faradays_LawFaraday’s law of induction states that an electromotive force is induced by a change in the magnetic flux.
- https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/21%3A_Circuits_Bioelectricity_and_DC_Instruments/21.04%3A_DC_Voltmeters_and_AmmetersVoltmeters measure voltage, whereas ammeters measure current.
