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Description
Flashcards by Gamaliel Walker, updated more than 1 year ago
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Created by Gamaliel Walker
about 8 years ago
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| Question | Answer |
| 1. The electromagnetic field produced around the coil is directly proportional to: a. magnitude of the applied current b. Rate of change in current c. Coil parameters d. All of the above | d. All of the above |
| 2. Electrical current is defined as the movement of electrons through a conductor. a. True b. False | a. True |
| 3. The unit of electromagnetic force is called ampere. a. True b. False | b. False |
| 4. The unit of resistance is: a. Ohm b. Volt c. Ampere d. All of the above | a. Ohm |
| 5. Ohm's law is stated in the following mathematical equation: a. I=ER b. E=IR c. R=I2E d. E=I2R | b. E=IR |
| 6. The resistance of a coil is determined by the length of wire used to wind a coil. a. True b. False | a. True |
| 7. The frequency of an alternating current is defined as the number of cycles of current that occur in one minute. a. True b. False | b. False |
| 8. The opposition to changes in alternating current flow through a coil is called: a. Resistance b. Impedance c. Inductive reactance d. Voltage | c. Inductive reactance |
| 9. The unit of impedance is: a. Volt b. Henry c. Ampere d. Ohm | d. Ohm |
| 10. Resistance and the inductive reactance cause results that occur 90○ out of phase with each other. a. True b. False | a. True |
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