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Electrical Engineering Materials - Interview Questions and Answers

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41. Non-linear resistors
A. produce harmonic distortion
B. follows Ohm's law at low tempera�tures only
C. result in non-uniform heating
D. none of the above
Explanation:
42. ________ has the best damping properties.
A. Diamond
B. High speed steel
C. Mild steel
D. Cast iron
Explanation:
43. Due to which of the following reasons copper and aluminium are not used for heating elements ?
A. Both have great tendency for oxidation
B. Both have low melting point
C. Very large length of wires will be required
D. All of the above
Explanation:
44. Carbon resistors are used extensively because they are
A. easy to make
B. compact
C. inexpensive
D. all of the above reasons
Explanation:
45. The value of critical field below the transition temperature will
A. increase
B. decrease
C. remain unchanged
D. any of the above
Explanation:
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