а. For the diagram below, a bar magnet is moved towards a circular loop. Indicate the direction of the induced current in the loop. (а) A. Clockwise B. Counter-Clockwise For the diagram below, a bar magnet is moved away from a circular loop. b. Indicate the direction of the induced current in the loop. (b) A. Clockwise B. Counter-Clockwise
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- 3. Induced Forces: Two conducting coils are arranged parallel to each other. The first coil is connected to a power supply so that the current is in at the top and out at the bottom. The voltage on the power supply is being decreased. a. What is the direction (left/right/zero) of the magnetic field (due to the first coil) as it goes through the 2nd coil? b. Is the magnetic flux increasing or decreasing? C. What is the direction of the induced magnetic field through the 2nd coil required to resist the change in magnetic flux? f. g. d. What is the direction (in at top/out at bottom or out at top/in at bottom) of the induced current in the 2nd coil required to produce the induced field needed? e. What is true of the magnetic force between the two coils? The coils will attract each other. The coils will repel each other. There is no magnetic force between the coils. What is the direction of the induced current in the 2nd coil if the voltage of the power supply for the first coil is…PART A: Consider a bar magnet sitting to the left of a coil. if the N pole is closest to the coil, what direction does the magnetic field point at the coil's location? A. Toward the Right B. Toward the Left C. depends on the direction of the coils D. not enough information to tell PART B: If a bar magnet is sitting to the left of a coil with its N pole closest to the coil, and the magnet moves toward the coil, the strength of the magnetic field at the location of the coil gets a) weaker b) stays the same c) stronger d) there is no way to tell PART C: As a magnet moves toward a set of coils, the larger the number of coils per meter, the larger the induced current. a) True b) False5. In the picture shown a diagram labeled ORIGINAL shows a metal loop of wire in a constant magnetic field B that is parallel to the axis of the loop labeled A. Four diagrams are shown labeled #1, #2, #3 and #4. In each diagram a change has been made to the ORIGINAL diagram. For which diagram(s) would an emf be induced in the ring while the change is being made? a. #1 and #2 only b. #3 only c. #1, #3 and #4 d. #1, #2 and #3 e. All of these
- 3. Induced Forces: Two conducting coils are arranged parallel to each other. The first coil is connected to a power supply so that the current is in at the top and out at the bottom. The voltage on the power supply is being decreased. a. What is the direction (left/right/zero) of the magnetic field (due to the first coil) as it goes through the 2nd coil? b. Is the magnetic flux increasing or decreasing? c. What is the direction of the induced magnetic field through the 2nd coil required to resist the change in magnetic flux? THK ε d. What is the direction (in at top/out at bottom or out at top/in at bottom) of the induced current in the 2nd coil required to produce the induced field needed? e. What is true of the magnetic force between the two coils? • The coils will attract each other. • The coils will repel each other. • There is no magnetic force between the coils. f. What is the direction of the induced current in the 2nd coil if the voltage of the power supply for the first coil…1.A bar magnet is held above the center of a wire loop lying in the horizontal plane as shown in the figure below. The south end of the magnet is toward the loop. After the magnet is dropped, what is true of the current in the resistor as viewed from above? (Select all that apply.) It is counterclockwise as the magnet falls toward the loop. It is clockwise as the magnet falls toward the loop. It is first counterclockwise as the magnet approaches the loop and then clockwise after it has passed through the loop. It is clockwise after the magnet has moved through the loop and moves away from it. It is always clockwise.A single circular loop of wire in the plane of the page is perpendicular to a uniform magnetic field B, directed out of the page as shown above. If the magnitude of the magnetic field is decreasing, then the induced current in the wire is: 28. Figure 5 A. directed upwards out of the paper; B. counter clockwise around the loop; C. anticlockwise round the loop; D. clockwise round the loop.
- In the picture on the left, a transient clockwise current could be induced in the coil by a. increasing the magnitude of the magnetic field b. none of these c. rotating the coil 90o about an axis that goes through the two hands. d. increasing the area of the coilquantities increase except for a.) the speed of the bar. b.) the strength of the magnetic field. c.) the distance between the two conducting rods. d.) the resistance of the resistor. e.) All of the above increase the current generated by the apparatus; there are no exceptions. 3.) The resistance of an RLC circuit is doubled. What is true about the resonant frequency of the circuit? W。こ LC a.) The resonant frequency is doubled. b.) The resonant frequency is halved. c.) The resonant frequency is quadrupled. d.) The resonant frequency is reduced by a factor of 1/4th. e.) The resonant frequency is independent of resistance and therefore remains the same. 4.) At high frequencies, the reactances of an inductor and capacitor are N low13. A bar magnet is oriented above a copper ring, as shown in the figure. The magnet is dropped and passes completely through the ring. As viewed from above, what is the direction of the current induced in the ring after the magnet has completely passed through the ring and is somewhat below it? A) There is no current in the ring. B) counterclockwise C) clockwise