169. Reciprocal of permeability is
A. reluctivity
B. susceptibility
C. permittivity
D. conductance

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170. The relative permeability is less than unity is case of
A. ferromagnetic materials
B. ferrites
C. non-ferrous materials
D. diamagnetic materials

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171. Which of the following is the unit of magnetic flux density?
A. weber
B. lumens
C. tesla
D. none of the above

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172. How much will be flux density in tesla units for flux of 45 p.Wb through 6 x 10-4m2,?
A. 0.075 T
B. 0.75 T
C. 0.65 T
D. 1.5 T

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173. Out of the following statements,concerning an electric field, which statement is not true?
A. The electric intensity is a vector quantity
B. The electric field intensity at a point is numerically equal to the force exerted upon a charge placed at that point
C. An electric field is defined as a point in space at which an electric charge would experience a force
D. Unit field intensity in the exertion of a force of one newton on a charge of one coulomb

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174. When a magnet is in motion relative to a coil the induced e.m.f. does not 1 depend upon
A. resistance of the coil
B. motion of the magnet
C. number of turns of the coil
D. pole strength of the magnet

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175. One Maxwell is equal to
A. 10-8 webers
B. 104 webers
C. 10-4 webers
D. 108 webers

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