(i) State Tangent law in magnetism.
(ii) On what principle is a tengent galvanometer based ?

On what principle is chromatography based ?

A) Tangent galvanometer is a moving magnet type galvanometer B) Tangent galvanometer works on tangent law

Name the law on which this principle is based.

Describe the working principle of a moving coil galvanometer. Why is necessary to use (i) a radial magnetic field and (ii) a cylindrical soft iron core in a galvanometer ? Write the expression for current sensitivity of the galvanometer . Can a galvanometer as such be used for measuring the current ? Explain.

Which of the following statements is correct ? A. Magnetic field due to earth changes with time and position B. For paramagnetic material magnetic susceptibility is negative C. Tangent galvanometer is used to measure power loss D. oint vecB* vecd s may be non zero quantity

A) In Tangent galvanometer the circular frame is rotated until the plane of the coil is parallel to magnetic meridian B) In Tangent galvanometer current through it is related to deflection of needle as ialpha tan theta

A battery of emf 12 V and internal resistance 2Omega is connected in series with a tangent galvanometer of resistance 4Omega . The deflection is 60^@ when the plane of the coil is along the magnetic meridian . To get a deflection of 30^@ , the resistance to be connected in series with the tangent galvanometer is

What energy change takes place in a dc motor ? On what principle does it work? State one factor to increase its speed of rotation.