13. Why is alternating current transfer more effective than dc current transfer over long distances? A. due to the height of power lines B. due to the use of ac generators C. due to step-up and step-down transformers reducing I'R losses D. due to very high voltages 14. AC is produced by a generator and its charge is, A. positive or negative. B. positive and neutral. C. negative and positive. D. negative and negative. 15. The amount of force the electrons are moved in a circuit is called A. ampere B. current C. emf D. voltage

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multiple choice number 13-15

B. Down
C. Right
D. Left
dn
9. A loop of wire sits in an unchanging magnetic field. Which of the following is a NOT a way to induce a
current through the loop?
A. Rotate the loop about its diameter
C. Stretch the loop
D. Squeeze the loop
B. Spin the loop about its center
10. Which of the following statements is NOT true about DC current flow?
A. DC current flows from negative to positive. C. Battery operated items are examples of DC
B. DC current flows at a constant rate.
power.
D. All DC powered items need to be plugged in.
11. The unidirectional current is called
A. alternating current
12. The supply of electrical energy for a consumer is usually by AC because
A. transmission and distribution are easily done.
B. it most suitable for variable speed motor.
B. electric charge
C. direct current
D. indirect current
C. the voltage drop in cables is minimal.
D. cable power losses are negligible.
13. Why is alternating current transfer more effective than dc current transfer over long distances?
A. due to the height of power lines
B. due to the use of ac generators
C. due to step-up and step-down transformers reducing I'R losses
D. due to very high voltages
14. AC is produced by a generator and its charge is
A. positive or negative.
15. The amount of force the electrons are moved in a circuit is called
B. positive and neutral. C. negative and positive. D. negative and negative.
А. ampere
B. current
C. emf
D. voltage
Transcribed Image Text:B. Down C. Right D. Left dn 9. A loop of wire sits in an unchanging magnetic field. Which of the following is a NOT a way to induce a current through the loop? A. Rotate the loop about its diameter C. Stretch the loop D. Squeeze the loop B. Spin the loop about its center 10. Which of the following statements is NOT true about DC current flow? A. DC current flows from negative to positive. C. Battery operated items are examples of DC B. DC current flows at a constant rate. power. D. All DC powered items need to be plugged in. 11. The unidirectional current is called A. alternating current 12. The supply of electrical energy for a consumer is usually by AC because A. transmission and distribution are easily done. B. it most suitable for variable speed motor. B. electric charge C. direct current D. indirect current C. the voltage drop in cables is minimal. D. cable power losses are negligible. 13. Why is alternating current transfer more effective than dc current transfer over long distances? A. due to the height of power lines B. due to the use of ac generators C. due to step-up and step-down transformers reducing I'R losses D. due to very high voltages 14. AC is produced by a generator and its charge is A. positive or negative. 15. The amount of force the electrons are moved in a circuit is called B. positive and neutral. C. negative and positive. D. negative and negative. А. ampere B. current C. emf D. voltage
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