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12 problems tagged with Current in Magnetic Field
P0947
Beginner Electromagnetism › MagnetismMoving-Coil Galvanometer Torque and Spring
The coil of a moving-coil galvanometer is $2.0$ cm long and $1.0$ cm wide, has $N = 250$ turns, and lies in a magnetic field $B = 0.2$ T (in the radial gap between the poles). When a current $I = 0.10$ mA flows, the coil deflects by $\varphi = 30^{\circ}$.
- Find the magnetic torque acting on the coil.
- Find the torsion constant of the spiral spring.
P0948
Beginner Electromagnetism › MagnetismFactors Affecting Moving-Coil Galvanometer Sensitivity
For a given current through a galvanometer, the larger the pointer's deflection angle, the higher the sensitivity. Analyze qualitatively which factors influence the sensitivity of a moving-coil galvanometer.
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