Time Left:
600
sec
1. What is the unit of susceptibility?
A. Am-1
B. Am2
C. No units
D. Am
2. The magnetic induction left behind in the sample after the magnetizing field has been removed is called
A. Hyteresis
B. Retentivity
C. Coercivity
D. Ferromagnetism
3. Declination is the angle between:
A. horizontal and vertical components of earth’s magnetic field
B. horizontal component and total magnetic field of the earth
C. geographic and magnetic meridian
D. geographic meridian and horizontal component of earth's magnetic field
4. The ferromagnetic materials can be magnetised easily because
A. Ferromagnetic materials have low susceptibility and permeability
B. Ferromagnetic materials have high susceptibility and low permeability
C. Ferromagnetic materials have high susceptibility and permeability
D. Ferromagnetic materials have low susceptibility and high permeability
5. What kinds of materials are used for coating magnetic tapes?
A. Diamagnetic Materials
B. Ferrites
C. Electromagnet
D. Paramagnetic materials
6. A particle of charge q and mass m moves in a circular orbit of radius r with angular speed. The ratio of the magnitude of its magnetic moment to that of its angular momentum depends on
A. q and m
B. ω and q
C. ω, q and m
D. ω and m
7. A wire of length L m carrying current i A is bent in the form of a circle. The magnitude of magnetic moment is
A. A
B. B
C. C
D. D
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