1.  Relative permeability of copper is
A. Infinite
B. one
C. less than one
D. greates than one

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2.  Relative permeability of a paramagnetic material is
A. one
B. less than one
C. little more than one
D. several hundred

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3.  Covalent bond energy in germanium is about eV.
A.7.4
B.31
C.3.4
D.20.4

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4. The following material is paraticularly suitable for use in standard resistance coils and in instrument shunts
A. nichrome
B. graphite
C. manganin
D. Alnico

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5. The Miller indices are the same for
A. perpendicular planes
B. crystal planes
C. parallel planes
D. the three crystallographic axes

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6.  The main purpose of tempering hardened steel is to increase its
A. ductibilty
B. hardnesss
C. carbon content
D. grain size

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7. Interfacial polarisation of plastics increases their
A. magnetic properties
B. power absorption at high frequencies
C. permittivity
D. electrical conductivity

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