1. [-/1 Points] DETAILS OSCOLPHYS2016 23.2.WA.008.TUTORIAL. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A single turn coil of radius 4.50 cm is held in a vertical plane and a magnet is rapidly moved relative to the coil as shown in the diagram below. S coil The field inside the coil changes from 0.275 T to 0.490 T in 0.120 s. If the resistance of the coil is 4.10 0, what is the magnitude and direction of the induced current in the coil as viewed from the side of the magnet? magnitude MA direction --Select--- Additional Materials Reading Tutorial2. [-11 Points] OSCOLPHYSZMS 23.2.WA.001. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A coil is placed next to a straight wire. The current in the wire is as shown in the diagram below. The coil and wire lie in the same plane with the +2 axis perpendicular to the plane of the coil. 3 coil wire (a) As the current in the wire increases, nd the direction of the induced current in the coil by answering the Following questions. (i) What is the direction of the magnetic field due to the current carrying wire in the center of the coil? --Seleci-- v (ii) As the current in the wire increases. how will the magnetic flux in the coii change?l -Seleci- I (iii) What is the direction of the induced magnetic flux in the coil? -Seleci- v (iv) What is the direction of the induced current in the coil? --Seleci-- I (h) Now suppose the current in the wire decreases. what is the direction of the induced current in the coil? (c) Now suppose the current in the wire suddeniy changes direction, what is the direction ofthe induced current in the coil? Addltlonal Materlala m Reading 3. [-/1 Points] DETAILS OSCOLPHYS2016 23.2.WA.009.TUTORIAL. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An emf is induced by rotating a 1027 turn, 20.0 cm diameter coil in the Earth's 6.13 x 10" T magnetic field. What average emf is induced, given the plane of the coil is originally perpendicular to the Earth's field and is rotated to be parallel to the field in 10.0 ms? V Additional Materials Reading Tutorial5. [-/1 Points] DETAILS OSCOLPHYS2016 23.2.WA.012. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.00-T field with his fingers pointing in the direction of the field. (a) Find the average emf induced in his wedding ring, given its diameter is 2.08 cm and assuming it takes 0.245 s to move it into the field. mv (b) If the resistance of the ring is 1.00 m, how much heat will be transferred to the ring during this time? mJ Additional Materials Reading6. [-1'1 Points] OSCOLPHYSZMG 23.3.WA.019.TUTORIAL. ASK YOUR TEACHER PRACTICE ANOTHER The figure below shows two parallel conducting rails, oriented vertically, connected to each otner at the top by a wire with a resistance R. A conducting metal rod is oriented horizontally and is in contact With the two vertical rails. The horizontal rod has a length L = 50.0 cm and mass 35.0 g. The rod is released from rest at location A and begins to fall through a region of uniform magnetic eld indicated by the shaded area in the gure. When the rod reaches point B, there is an induced current of 1.85 A owing to the right in the rod, and the rod is moving downward with an acceleration of magnitude 7.85 mlsz. What are the direction and magnitude of the magnetic Field in the shaded region? magnitude |:T direction Additional Material: L51 Reading Q Tutorial 7. [-/1 Points] DETAILS OSCOLPHYS2016 23.3.WA.020. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A long, straight wire carrying a current of 3.92 A moves with a constant speed v to the right. A 5-turn circular coil of diameter 12.5 cm, and resistance of 3.25 u$2, lies stationary in the same plane as the straight wire. At some initial time the wire is at a distance d = 7.00 cm from the center of the coil. 5.44 s later, the wire is at a distance 2d from the center of the coil. What is the magnitude and direction of the average induced current in the coil? magnitude MA direction ---Select--- O - - - - 2d initial situation final situation Additional Materials Reading8. [-/1 Points] DETAILS OSCOLPHYS2016 23.6.WA.027. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Suppose a motor connected to a 135 V source draws 19.6 A when it first starts. (a) What is its resistance? (b) What current does it draw at its normal operating speed when it develops a 100 V back emf? A Additional Materials Reading9. [-/1 Points] DETAILS OSCOLPHYS2016 23.6.WA.028. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The motor in a toy car operates on 5.50 V, developing a 4.20 V back emf at normal speed. If it draws 3.10 A at normal speed, what current does it draw when starting? A Additional Materials Reading