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Tangent Law And Galvanometer - Questions and Answers

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31. in a coil of radius r and having n turns the intensity of magnetic field produced by current of I A is
A. H = n I/2r2
B. H = n I/2r
C. H = 2r/n I
D. H = n I/2
Explanation:
32. In TanA position, the arms of the magnetometer are kept
A. parallel to the magnetic meridian
B. along the magnetic meridian
C. perpendicular to the magnetic meridian
D. along the equator
Explanation:
33. If the field at the centre of a coil of radius 8 cm having 80 turns is 200 A-turn/m, then the current passing through it is
A. 4 A
B. 40 A
C. 0.4 A
D. 400 A
Explanation:
34. the two turn coil of a tangent galvanometer
A. is used to produce a magnetic field
B. is used to measure currents of low value
C. is used to measure currents of high value
D. is made with thin wire
Explanation:
35. The deflection magnetometer is constructed such that the centre of the magnetic needle
A. is at the centre of the compass box
B. is at the centre of the plate form
C. is at the centre of the magnetic meridian
D. coinides with the zeros of the graduations an the arms
Explanation:
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