Electrical Engineering Materials Objective Questions - Set 08 - ObjectiveBooks

Electrical Engineering Materials Objective Questions - Set 08

Practice Test: Question Set - 08

1. If the resistance of a conductor does not vary in accordance with Ohm's law it is known as
    (A) Nonlinear conductor
    (B) Reverse conductor
    (C) Bad-conductor
    (D) Non-conductor

2. The number of atoms per unit cell in B.C.C. structure is
    (A) 1
    (B) 2
    (C) 4
    (D) 8

3. Carbon electrodes are not used in
    (A) GLS lamps
    (B) Electric arc furnace
    (C) Dry cells
    (D) Cinema projectors

4. High resistivity materials are used in
    (A) Precision instruments
    (B) Heating elements
    (C) Motor starters
    (D) All of the above

5. Nonlinear resistors
    (A) Produce harmonic distortion
    (B) Follows Ohm's law at low temperatures only
    (C) Result in nonuniform heating
    (D) None of the above

6. Platinum is used in
    (A) Electrical contacts
    (B) Thermocouple
    (C) Heating element in high temperature furnace
    (D) All of the above

7. Surface resistance of an insulating material is reduced due to the
    (A) Smoky and dirty atmosphere
    (B) Humidity in the atmosphere
    (C) Both (A) and (B)
    (D) Neither (A) nor (B)

8. The tiny block formed by the arrangement of a small group of atoms is called the
    (A) Unit cell
    (B) Space lattice
    (C) Either (A) or (B)
    (D) None of the above

9. The conductors have transport phenomena of electrons due to
    (A) Electric field
    (B) Magnetic field
    (C) Electromagnetic field
    (D) None of the above

10. ________ is most commonly used for making magnetic recording tape
    (A) Silver nitrate
    (B) Ferric oxide
    (C) Small particles of iron
    (D) Silicon iron

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