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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