Congratulations – you have completed Inductors Online Test Set 1.
You scored 8 points out of 10 points total.
Your answers are shown below:
1. A change of one ampere per second in an inductor that induces a voltage of one volt is considered as which unit value?
- an ohm
- a farad
- a lenz
- a henry
2. When a coil collapses the induced circuit current will:
- go to zero
- be in the opposite direction
- be in the same direction
- aid counter emf buildup
3. What is remanence?
- reactance
- retentitivity
- reluctance
- resistance
4. When an electromagnet reaches maximum strength, it is considered to be:
- at saturation
- at field strength
- in field condition
- inhibited
5. If the primary of a 4:1 turns transformer dissipates 5 W, what is the secondary power?
- 1.25 pW
- 5.0 W
- 9.5 W
- 20.0 mW
6. With 100 Vac applied to the primary of a transformer so that it draws 500 mA, what will be the 300 Vac secondary current?
- 150 mA
- 167 mA
- 200 mA
- 1500 mA
7. A utility pole transformer used to supply a residential customer with two phases uses:
- a center tap on the secondary
- two phases on the primary
- a separate ground for each phase
- a small coefficient of coupling
8. Which coil would be used as a step-up transformer primary if coil number 1 has 100 more turns than coil number 2?
- coil 1
- coil 2
- The coil windings must be the same
- The coil ratio is too small
9. As a generator armature passes the 270 degree point, the induced voltage is:
- at maximum positive
- between maximum negative and zero
- at maximum negative
- between zero and maximum positive
10. If you wanted to decrease the inductance of a coil, you might increase the:
- number of turns
- permeability of the core
- spacing between turns
- area of the coil
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