Motional Emf: A conducting rod whose length is ? = 25 cm is placed on a U-shaped metal wire that is connected to a lightbulb having a resistance of 8.0 ? as shown in the figure. The wire and the rod are in the plane of the page. A constant uniform magnetic field of strength 0.40 T is applied perpendicular to and out of the paper. An external applied force moves the rod to the left with a constant speed of 12 m/s. What are the magnitude and direction of the induced current in the circuit?
A. 150 mA clockwise
B. 150 mA counterclockwise
C. 34 mA counterclockwise
D. 34 mA clockwise
E. 100 mA clockwise
Answer: B
You might also like to view...
Hubble's law requires calibration with distances measured by standard candle techniques. Which standard candle technique is best for measuring the distances of very distant galaxies?
What will be an ideal response?
According to current understanding, what is a quasar?
A) an active galactic nucleus that is particularly luminous B) a large galaxy thought to be formed by the merger of several smaller galaxies, typically found in the center of a galaxy cluster C) Any object with an extremely large redshift is called a quasar. D) a galaxy with an unusually high rate of star formation
Which of these electromagnetic waves have the shortest wavelength?
A) radio waves B) infrared waves C) X-rays D) ultraviolet waves E) light waves
The Surface Weather map presents data and analysis for what time of day?