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21. A current of 1A flowing through a property arranged tangent galvanometer produces a deflection of 30° in the needle. The current required to produce a deflection of 60° is
A. 2A
B. 1.5A
C. 3A
D. 4A
Explanation:
22. Tangent galvanometer works on the principle of
A. Biot-Savart’s law
B. Ampere’s law
C. Coulomb’s law
D. Tangent law
Explanation:
23. During the initial adjustment, the pointer of the deflection magnetometer in TanA position.
A. points East – West direction
B. points North – South direction
C. is perpendicular to magnetic meridian
D. is along the arms
Explanation:
24. In Tan A position of equal distance method of comparing the magnetic moments of bar magnets, the ratio of their moments is given by
A. M1/M2 = (d2+l12)2 tan θ1/ (d2+l22)2 tan θ2
B. M1/M2 = (d2+l12)3/2 tan θ1/ (d2+l22)3/2 tan θ2
C. M1/M2 = (d2-l12)2 tan θ1/ (d2-l22)2 tan θ2
D. M1/M2 = (d2-l12)3/2 tan θ1/ (d2-l22)3/2 tan θ2
Explanation:
25. In Tan B position of equal distance method of comparing magnetic moments of bar magnets, the ratio of their moments is given be
A. M1/M2 = (d2+l22)3/2 tan θ1/ (d2+l12)3/2 tan θ2
B. M1/M2 = (d2+l12)3/2 tan θ1/ (d2+l22)3/2 tan θ2
C. M1/M2 = (d2-l12)2 tan θ1/ (d2+l22)2 tan θ2
D. M1/M2 = (d2+l12)2 tan θ1/ (d2+l22)2 tan θ2
Explanation:
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