Which of these does not result in an induced voltage across the coil? The x’s represent magnetic field directed into the page Select one: A.Change the field strength. B.Let the coil sit in the magnetic field as shown. C.Rotate the coil into and out of the page. D. Distort the shape of the coil
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- 1. Two solenoids have the same number of turns per unit length, n, and same current i flowing through them. The diameter of coil (a) is twice that of coil (b). If which coil is the magnetic field strength bigger? O A OB A. Coil (a) B. Coil (b) C. The magnetic field is the same in both. D. Not enough information O C ANNAMAANA wwwwwwwwwww. No, that's not the correct answer. (a) X (b)Which of the following statements best describes Oersted’s Principle? a. A current-carrying conductor produces a linear magnetic field from the north to the south pole b. A current-carrying conductor creates a circular magnetic field around a wire c. A solenoid will create a magnetic field similar to that of a bar magnet d. A charge entering a magnetic field will undergo circular motion e. None of the above explain Oersted’s Principlea.) a current in the CW direction to enhance the decreasing north magnetic field. b.) a current in the CW direction to enhance the decreasing south magnetic field. c.) a current in the CW direction to oppose the increasing south magnetic field. d.) a current in the CW direction to oppose the increasing north magnetic field. e.) no current in the coil. 7.) A conducting coil is rotated at constant speed in a uniform magnetic field as shown in the figure here. The time required by the loop to make a full rotation is T. The current generated in the coil would increase Side view a.) if the angular speed of the coil increases. b.) if the area of the coil increases. c.) if the strength of the magnetic field increases. d.) All of the above are correct. e.) None of the above are correct. 8.) An RLC circuit has a resonant frequency of fo. When the circuit is driven by an AC voltag source whose frequency is 2fo, which of the following is the most accurate?
- A negatively charged particle is moving with a constant velocity directed to the left through a region of a uniform magnetic field B directed into the page as shown in the figure, in which direction must an electric field be applied to keep the particle moving along a straight line? XB Select one: a.Upward b.Downward c.into the page d.To the leftin the plane of the page e.Out of the page 1.To the right in the plane of the pageWhat is the direction of the magnetic force on a negative charge that moves as shown in the figure? B Select one: O a. In O b. there is no magnetic force O. Out O d. Left When the light is passing from rarer to a denser medium, which is the correct statement? O a. speed becomes zero O b. speed of light increases speed of light remains constant O d. speed of light decreasesTwo high-current transmission lines carry currents of 45 A and 78 A in the same direction and are suspended parallel to each other 28 cm apart. If the vertical posts supporting these wires divide the lines into straight 16 m segments, what magnetic force does each segment exert on the other? _N. Exponential format with 2 SẺ. QUESTION 14 An induced emf will occur if A. the strength of the magnetic field is changed. B. the coil's area is changed. C. the angle at which the magnetic field and the coil's area meet is changed. D. all of the above.
- You put a magnet inside a coil of wire. Why is there not a current produced in the coil when the magnet is sitting in the wire? Select one: a. The magnet has to be very strong to cause current to flow. b. There has to be motion to cause current to flow. c. The wire has to have low resistance for current to flow. d. The magnetic field inside the coil isn't changing.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 coil2. A generator consists of a 87-turn coil rotating in a uniform magnetic field of 1.35 T. The generator produces an output V=25-sin(812-t), where V is in Volts and t is in seconds. What is the area of the rotating coil? A. 1.24 cm² B. 2.62 cm² C. 3.87 cm² D. 5.44 cm² E. 6.91 cm²