J
Jenelle D
Guest
11. How can a change in voltage in a coil of wire (the primary) be transferred to a neighboring coil of wire (the secondary) without physical contact? -
12. Why does an iron core that extends inside and connects the primary and secondary coils intensify electromagnetic induction? -
13. What does a transformer actually transform-voltage, current, or energy? -
14. What does a step-up transformer step up – voltage, current, or energy? -
15. How does the relative number of turns on the primary and the secondary coil in a transformer affect the step-up or step-down voltage factor? -
16. If the number of secondary turns is 10 times the number of primary turns, and the input voltage to the primary is 6 volts, how many volts will be induced in the secondary coil? -
17. a. In a transformer, how does the power input to the primary coil compare with the power output of the secondary coil? –
b. How does the product of voltage and current in the primary compare with the product of voltage and current in the secondary? -
18. Why is it advantageous to transmit electric power long distances at high voltages? -
19. What fundamental quantity underlies the concepts of voltages and currents? -
20. Distinguish between Faraday’s law expressed in terms of fields and Maxwell’s counterpart to Faraday’s law. How are the two laws symmetrical? -
21. How does the wave speeds compare for high-frequency and low-frequency electromagnetic waves? -
12. Why does an iron core that extends inside and connects the primary and secondary coils intensify electromagnetic induction? -
13. What does a transformer actually transform-voltage, current, or energy? -
14. What does a step-up transformer step up – voltage, current, or energy? -
15. How does the relative number of turns on the primary and the secondary coil in a transformer affect the step-up or step-down voltage factor? -
16. If the number of secondary turns is 10 times the number of primary turns, and the input voltage to the primary is 6 volts, how many volts will be induced in the secondary coil? -
17. a. In a transformer, how does the power input to the primary coil compare with the power output of the secondary coil? –
b. How does the product of voltage and current in the primary compare with the product of voltage and current in the secondary? -
18. Why is it advantageous to transmit electric power long distances at high voltages? -
19. What fundamental quantity underlies the concepts of voltages and currents? -
20. Distinguish between Faraday’s law expressed in terms of fields and Maxwell’s counterpart to Faraday’s law. How are the two laws symmetrical? -
21. How does the wave speeds compare for high-frequency and low-frequency electromagnetic waves? -