2. An aluminum disk is held between the poles of a powerful magnet and then pulled out. The person pulling on the disk feels an opposing force due to currents induced through Faraday's law. Explain why the magnitude of the force becomes larger as the disk is pulled faster.
Q: 4. A rectangular coil that has a length of 16.5 cm and a width of 8.0 cm containing 17 loops lies…
A:
Q: 1. An electron is moving near a long, current carrying wire with a speed of v = 1100 m/s. When the…
A:
Q: What do you end up with if you cut a magnet in half? A. one north-pole piece and one south-pole…
A: We cut a magnet in two pieces
Q: Identify the smallest scale at which one can show magnetic effects? A. A macroscopic object such as…
A: A smallest scale magnetic field is present for microscopic system. A magnetized iron nail will…
Q: 2. You have a solenoid that is 40 cm long and with 350 turns and want to produce a magnetic field…
A:
Q: 12. The dipole moment associated with an atom of iron in an iron bar is 1.8 x 10-23 amp-m?. Assume…
A: Given, The dipole moment of one atom is μo=1.8×10-23A/m2 length of iron bar is L=5cm the…
Q: 1. A thin ring rotates about an axis perpendicular to a uniform magnetic field H. Its initial…
A: Let the area of the ring be A, the radius of the ring be a, the resistance of the ring be R, the…
Q: Answer the Multiple Choice Questions: 1- The mass of an object: A. is slightly different at…
A:
Q: Calculate the magnitude and direction of the force felt on the wire below. Assume the mag- netic…
A: Solution:Given:B = magnetic field (going into the page) = 0.25 TL = length of wire = 20 cm = 0.20 mI…
Q: he electromagnet to the other
A:
Q: 4. The following diagram shows the current direction in a straight conductor. Draw the magnetic…
A: Magnetic field.
Q: Find the speed of the electron.
A: Given: Magnetic force, F=6.5×10-11N Magnetic field, B=4T Angle, θ=45°
Q: Suppose that a bar magnet is dropped through a horizontal loop of wire connected to a galvanometer.…
A: since the loop/ coil is kept horizontal and the bar magnet is dropped through it , so there will…
Q: 3. Calculate the magnitude and direction of the force felt on the wire below. Assume the mag- netic…
A:
Q: 3. The diagram below shows a rectangular 35.0-turn coil of wire with W=3.71 cm and L= 4.21 cm that…
A:
Q: Write down three examples of the use of electricity and magnetism in the medical field. For example,…
A: Radiofrequency ablation (RFA) procedures in medicine are mainly used in cardiology for the treatment…
Q: 7. A proton is moving through a magnetic field in a direction perpendicular to the field as shown…
A: Given: The strength of the magnetic field is 0.13 T. The magnitude of the magnetic force on the…
Q: 2. A solid conducting disk on a shaft is rotated in an external uniform magnetic field directed…
A: Answer = 32.4 revolutions per second Solution +++++++++++++++++++ We know that emf induced due to…
Q: 5. A rectangular loop of wire that is 35 cm wide and 15 cm long is placed in a region where the…
A: The magnetic flus through the loop will be Flux = B×A×cosθ where B is magnetic field and A is area…
Q: chanically. video Pendulum Magnetic Braking found uminum per um is initiall
A: a)For the pendulum swinging counterclockwise into the magnetic field, the eddy current will be…
Q: 6. Consider two point charges of charge q and a fixed distance d apart that orbit around each other…
A: Given, two-point charges with charge q and -q and apart from a fixed distance d, orbiting around…
Q: How much current must flow through a long straight wire for the magnetic field strength to be 1.0 mT…
A: Given data, Magnetic field B=1 ×10-3 T Length l=0.02 m Constant μ0=4π×10-7 m/A
Q: You have the apparatus shown in Figure P21.13. A circular metal plate swings past the north pole of…
A: Given data: A circular metal plate swings past the north pole of a permanent magnet. The metal is…
Q: 36. How many turns must be wound on a flat, circular coil of radius 20 cm in order to produc a…
A: Current in coil i= 0.85 A Magnetic field at center of coil B= 4.0*10-5 T radius of coil r= 20 cm=…
Q: When you push the South end of a magnet into a solenoid, it creates a negative voltage. If you push…
A:
Q: 29. You can change the magnetic flux through a given surface by a. changing the magnetic field. b.…
A: The magnetic flux through a given surface is given by the formula Φ = B⋅A⋅cosθ, where B is the…
Step by step
Solved in 3 steps with 3 images
- 2. Suppose that a rectangular toroid has 2000 windings, h = 1 cm, an inner radius of R1 = 4 cm, and an outer radius of R2 = 6 cm. What is the current flowing through the toroid when the energy in its magnetic field is 2.0 x 10-6 J?3. DETAILS MY NOTES You are working during the summer at a company that builds theme parks. The company is designing an electromagnetic propulsion system for a new roller coaster. A model of a substructure of the device appears in the figure below. The rod is of length d = 1.00 m and mass m = 0.700 kg. The rod carries a current I = 100 A in the direction shown and rolls along the rails of length L = 15.0 m without slipping. The entire system of rod and rails is immersed in a uniform downward-directed magnetic field with magnitude 8 = 1.90 T. The electromagnetic force on the rod is parallel to the rails, causing the rod to roll to the right in the figure. When a full-scale device is produced, this rod will represent the axle of wheels on which the car and i on the grounds of the company. By projecting the rod from the rails in a horizontal direction from a height h = 1.80 m, the projection speed can be determined from how far from the ends of the rails the rod hits the ground. Your…13. You have the apparatus shown in Figure P21.13. A circular metal plate swings past the north pole of a permanent magnet. The metal consists of a series of rings of in- creasing radius. Indicate the direction of the current in one ring (a) as the metal swings down from the left into the magnet- ic field and (b) as the metal swings up to- ward the right out of the magnetic field. Use Lenz's law to justify your answers. Figure P21.13 Metal plate Magnet N
- 7. A very long thin wire produces a magnetic field of 0.002 x 10-4 T at a distance of 1.0 mm from the wire. What is the magnitude of the current? = 4 x 10-7 T.m/A) (Mo a) 1.0 mA b) 2.0 mA c) 4000 mA d) 3100 mA 8. An ideal solenoid having 200 turns and carrying a current of 2.0 A is 25 cm long. What is the magnitude of the magnetic field at the center of the solenoid? (но = 4 x 10-7 T.m/A)6. Green turtles use the earth’s magnetic field to navigate. They seem to use the field to tell them their latitude—how far north or south of the equator they are. Explain how knowing the direction of the earth’s field could give this information.CQ 10. Many roller coasters use magnetic brakes to slow the train at the end of its run. A conducting plate on the train passes by powerful magnets fixed on the track. a. Explain the principle behind this magnetic braking. b. The system needs an ordinary friction-based brake to bring the train to a full stop. Explain why the magnetic brake is not very efficient when the train is moving slowly