A tangent galvanometer is used to measure: | vedclass

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(A) When a steady current $I$ is passed through the coil of a tangent galvanometer,it produces a magnetic field $B$ at the center of the coil,which is

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Steady currents

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(A) When a steady current $I$ is passed through the coil of a tangent galvanometer,it produces a magnetic field $B$ at the center of the coil,which is perpendicular to the horizontal component of the Earth's magnetic field $H$.Under the influence of these two mutually perpendicular magnetic fields,the magnetic needle deflects by an angle $	heta$.According to the tangent law,$B = H 	an 	heta$.Since $B$ is directly proportional to the current $I$ $(B = kI)$,we get $I = (H/k) 	an 	heta$,which means $I \propto 	an 	heta$.Thus,the tangent galvanometer is primarily used to measure steady electric currents.

$A$ tangent galvanometer is used to measure:

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