Consider a circular loop that is threaded by a magnetic field that points into the page. The magnetic field continues to point into the page while increasing in strength. State the direction of the induced current. XXX O Clockwise Counterclockwise XXX
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- ASAPA coil lies on a horizontal plane and the north pole of the magnet is pulled out of the coil with a quick movement in the direction shown in the diagram below. S O Find the direction of the induced current in the coil, when looking down on the coil from above, by answering the following questions. (a) What is the direction of the magnetic field due to the magnet in the center of the coil? +X -X +y -Y O O O +z -Z Review magnetic field line pattern for a bar magnet. (b) As the magnet is moved in the direction indicated, how will the magnetic flux in the coil change? increase O decrease O remain the same +X (c) What is the direction of the induced magnetic flux in the coil? -X N +y -Y coil +Z y Į X Z -Z As per Lenz's law, in what direction will the induced flux and, therefore, the induced field, act in the center of the coil?In an electric motor, a coil with 104 turns of radius 1.90 cm can rotate between the poles of a magnet. The magnetic field magnitude is 0.200 T. When the current through the coil is 57.7 mA, what is the maximum torque that the motor can deliver? N.m
- The component of the external magnetic field along the central axis of a 69 turn circular coil of radius 47.0 cm decreases from 2.90 T to 0.700 T in 2.10 s. If the resistance of the coil is R = 3.00 §, what is the magnitude of the induced current in the coil? magnitude: What is the direction of the current if the axial component of the field points away from the viewer? counter-clockwise clockwise AA metal bar is in electrical contact with some metal rails as it is sliding to the left (assume that the rails and rod form a complete loop). And the rod is moving to the left in a uniform magnetic field that points out of the screen. What is the direction of the induced current (if any) in the rod? O There is no induced current O up O downA 2 meter-long bar is being moved to the right at a constant speed. The bar is sliding on aframe that includes a resistor with R = 3.25 Ω. There is also a uniform 5.75-T magneticfield, directed into the page. At what speed should the bar be moved to produce a currentof 0.800 A in the resistor
- Consider a conducting loop placed on a horizontal plane in a region of uniform vertical magnetic field directed downward. If the magnitude of the magnetic field begins to decrease, what will be the direction of the induced current in the loop, as viewed from above? O Counterclockwise, so that the magnetic field of the loop is downward. O Counterclockwise, so that the magnetic field of the loop is upward. O Clockwise, so that the magnetic field of the loop is upward. O There will be no induced current, so that the loop does not have a magnetic moment. O Clockwise, so that the magnetic field of the loop is downward.Need Help? mV Sascha Hahn/Shutterstock.com A helicopter (see figure below) has blades of length 3.40 m, extending out from a central hub and rotating at 2.30 rev/s. If the vertical component of the Earth's magnetic field is 50.0 μT, what is the magnitude of emf induced between the blade tip and the center hub? Read ItQuestion 1: When an external magnetic flux through a conducting loop decreases in magnitude, a current is induced in the loop that creates its own magnetic flux through the loop. How does that induced magnetic flux affect the total magnetic flux through the loop? O It does not affect the total magnetic flux. O It decreases and then increases the total magnetic flux. OIt increases the total magnetic flux. OIt increases and then decreases the total magnetic flux. O It decreases the total magnetic flux. Part (a) Some additional information, which is not included in the video, is that the SI unit of magnetic flux is the weber, denoted Wb. Using that information and the contents of the video, solve this numerical problem: A conducting loop, with a resistance of 2.0 Q2, encloses magnetic flux that is increasing at the rate of 2.0 Wb/s. The magnitude of the current induced in the loop is... (select the best choice) Part (b) 02A 04A 01/2A O1A 01/4 A Imagine a circular conducting loop glued…
- A circle wire loop with 10 turns of wire has an area of 0.5 m2. It is initially in a 0.3 T magnetic field. Then over 0.5 seconds it is moved to a location with no magnetic field. What is the magnetic flux? (The unit of flux is Weber, W) What is the induced emf (voltage)?The magnetic field is pointing out of the board everywhere in space.The metal bar on top of the rails is being moved by an external agentto the right. What is the direction of the induced current on the bar?Ben coils a wire to create a solenoid that is 25-cm long with 300 turns. Mak coils a wire to create a solenoid that is 10-cm long with 200 turns. They place their solenoids in otherwise identical circuits so that the steady-state current is the same for each solenoid. Determine the ratio of the magnetic fields of the two solenoids BPh/BF.