12. A copper ring (3.5cm radius) is moving with constant speed into of a region of uniform magnetic field (3.2-T). Half the ring is in the magnetic field, the other half is in a region of no magnetic field (see the sketch). In which direction (CW or CCW) is the induced current moving around the ring? Cw B عنه 12
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- The component of the external magnetic field along the central axis of a 78 turn circular coil of radius 32.0 cm decreases from 2.40 T to 0.100 T in 2.00 s. If the resistance of the coil is R=3.00 Ω, what is the magnitude of the induced current in the coil? magnitude: A What is the direction of the current if the axial component of the field points away from the viewer?A square loop of wire is inside a region of changing magnetic field (see figure below). The sides of the square loop are 0.1m with a resistor of resistance 2502 connected to one of the sides. The magnetic field increases linearly from 0.2T to 0.5T in 3s. What is the magnitude of E.M.F induced across the resistor. O ImV 10V 232 2 Ο ΙμνThe 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 A
- O Resources Give Up O Hint A 145 turn circular coil of radius 2.29 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. Over an interval of 0.169 s, the magnetic field strength increases from 55.7 mT to 99.3 mT. Find the magnitude of the average emf Eve induced in the coil during this time interval, in millivolts. Eve = mV7. An air-filled long solenoid has a turn density of 1000 turns/m, a radius of 1.50 cm and carries a current of 0.0700 A that is increasing at a rate of 1.50 A/s. (a) Find the magnitude of the magnetic field inside the solenoid. (b) Find the induced electric field at a point 0.500 cm from the solenoid axis. (c) Determine the magnitude of the Poynting vector at this location.Calculate the Hall voltage induced on a patient's heart while being scanned by an MRI unit. Approximate the conducting path on the heart wall by a wire 8.00 cm long that moves at 10.0 cm/s perpendicular to a 1.45 T magnetic field. mV
- Question 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…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.