3 The diagram below shows the instantaneous position of a rotating loop of wire between two bar magnets. The loop is rotating clockwise when viewed from P. The magnets and the loop all lie in the same plane. Indicate the direction of induced current flow in the loop. Explain how you arrive at your answer. N S (ans: clockwise current) axis of rotation
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The diagram shows the instantaneous position of a rotating loop of wire between two bar magnets. The loop is rotating clockwise when viewed from P. The magnets and the loop all lie in the same plane. Indicate/Illustrate the direction of induced current flow in the loop.
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- O Resources R Give Up? O Feedback The component of the external magnetic field along the central axis of a 125 turn circular coil of radius 16.0 cm decreases from 2.40 T to 0.250 T in 3.10 s. If the resistance of the coil is R = 4.50 2, what is the magnitude of the induced current in the coil? magnitude: Incorrect What is the direction of the current if the axial component of the field points away from the viewer? O counter-clockwise O clockwisePassage: The metal equilateral triangle in the figure, 20 cmcm on each side, is halfway into a 0.10 TT magnetic field.(Figure 1) Question A. What is the magnetic flux through the triangle? in Wb Question B. If the magnetic field strength decreases, what is the direction of the induced current in the triangle? a. clockwise b. coutnerclockwiseIn the image below, two conducting rings are in the same plane. The outer ring contains a resistor R, while the inner ring has a clockwise current /that is increasing in magnitude. You may assume that the magnetic field that is generated by the inner ring is negligible outside the ring. The induced current through R R. O goes from b to a O goes from a to b. O doesnt' exist. There is no induced current through R.
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- 1. Recall the induction example from lecture in which a resistanceless metal bar with length & slides to the right on metal rails with a constant speed v and the metal rails are connected to a resistor R. The entire system is placed in a uniform constant magnetic field with magnitude B pointing out of the screen. е R a) Use Lenz's last to determine the direction in which the induced current flows. b) In lecture we simply assumed the bar moves with constant speed v. Show that an external force is needed to ensure the bar travels right with constant speed and determine the magnitude of this force (Hint: there will be a magnetic force on the bar due to the current flowing through it). c*) Show that the power dissipated in the resistor equals the rate at which work is done on the bar by the external force.Bar magnets are moved into the wire coils in identical quick fashion. Voltage induced in each coil causes a current as indicated on the galvanometer. Neglect the electrical resistance in the loops in the coil, and rank, from greatest to least, the magnitude of induced voltage.A bar magnet is let fall toward the center of a conducting loop of wire, with the north pole oriented downward. Viewed from the same side of the loop as the magnet, as the north pole approaches the loop, what is the direction of the induced current? Parallel to the length of the magnet. Counterclockwise Clockwise zero
- Chapter 30, Concept Question 04 The figure shows two circuits in which a conducting bar is slid at the same speed v through the same uniform magnetic field and along a U- shaped wire. The parallel lengths of the wire are separated by 24 in circuit 1 and by L in circuit 2. The current induced in circuit 1 is counterclockwise. e (2) Is the magnetic field into or out of the page? Into Out of Is the current induced in circuit 2 clockwise or counterclockwise? Counterclockwise Clockwise Is the emf induced in circuit 1 larger than, smaller than, or the same as that in circuit 2? Larger The same as SmallerA current I flows around the rectangular loop shown in the accompanying figure. B A D Write expressions for B . dl for the paths A, B , C and D A: B: C: D:A loop of wire is moving near a long, straight wire carrying a constant current I as shown in the figure below. (a) Determine the direction of the induced current in the loop as it moves away from the wire. clockwise counterclockwise into the page out of the page (b) What would be the direction of the induced current in the loop if it were moving toward the wire? clockwise counterclockwise into the page out of the page