Inductors Online Test – Multiple Choice Questions and Answers Posted on April 16, 2024April 16, 2024 by engineer16 Comments 1. 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 2. 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 3. 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 4. What is remanence? reactance retentitivity reluctance resistance 5. 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 6. 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 7. 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 8. 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 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. When an electromagnet reaches maximum strength, it is considered to be: at saturation at field strength in field condition inhibited Loading … Question 1 of 10
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