Lenz's Law: A circular wire ring is situated above a long straight wire, as shown in the figure. The straight wire has a current I flowing to the right, and this current is increasing at a constant rate. Which of the following statements is true?
A. There is an induced current in the wire ring, directed in clockwise orientation.
B. There is an induced current in the wire ring, directed in a counterclockwise orientation.
C. There is no induced current in the wire ring.
Answer: A
You might also like to view...
What is the primary reason why a Pluto flyby mission would be cheaper than a Pluto orbiter?
A) The flyby can use less expensive cameras than the orbiter. B) The flyby is easier to design than the orbiter. C) The fuel needed for an orbiter to slow down when it reaches Pluto is very expensive in and of itself. D) The fuel needed for an orbiter to slow down when it reaches Pluto adds a lot of weight to the spacecraft. E) The question is incorrect; in general, orbiters are cheaper than flybys.
The Great Red Spot on Jupiter is ________.
A. a largo tornado sweeping the planet from north to south B. a large rising cloud of gas C. a planetesimal impact site D. a giant vortex that has persisted for over 300 years
Which of the following experiments demonstrates the fact that the mere act of observation, or detection, causes changes in the microscopic world?
A) The detection of radioactive decay using a Geiger counter. B) The electron double-slit experiment with a detector placed behind one of the slits. C) The interference pattern that is detected on the screen in the electron double-slit experiment. D) The photoelectric effect that results from the detection of light. E) None of the above.
Consider two long, straight parallel wires, each carrying a current I. If the currents are flowing in the same direction:
a. the two wires will attract each other. b. the two wires will repel each other. c. neither wire will exert a force on the other. d. the two wires will exert a torque on each other.