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Magnetic Jeopardy

Magnetic Jeopardy. 1. Electrical charges and magnetic poles have many similarities, but one difference is:. 2. Geophysicists today generally attribute the existence of the Earth's magnetic field to which of the following?.

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Magnetic Jeopardy

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  1. Magnetic Jeopardy

  2. 1. Electrical charges and magnetic poles have many similarities, but one difference is:

  3. 2. Geophysicists today generally attribute the existence of the Earth's magnetic field to which of the following?

  4. 3. The magnetic pole of the Earth nearest the geographic North Pole corresponds to which of the following?

  5. 4. An electron which moves with a speed of 3.0  104 m/s parallel to a uniform magnetic field of 0.40 T experiences a force of what magnitude? (e = 1.6  1019 C)

  6. 5. Assume that a uniform magnetic field is directed into this page. If an electron is released with an initial velocity directed from the bottom edge to the top edge of the page, which of the following describes the direction of the resultant force acting on the electron?

  7. 6. A proton is released such that its initial velocity is from right to left across this page. The proton's path, however, is deflected in a direction toward the bottom edge of the page due to the presence of a uniform magnetic field. What is the direction of this field?

  8. 7. There is a magnetic force on a particle. It is possible that the particle is:

  9. 8. A 2.0-m wire segment carrying a current of 0.60 A oriented parallel to a uniform magnetic field of 0.50 T experiences a force of what magnitude?

  10. 9. A copper wire of length 25 cm is in a magnetic field of 0.20 T. If it has a mass of 10 g, what is the minimum current through the wire that would cause a magnetic force equal to its weight?

  11. 10. A horizontal wire of length 3.0 m carries a current of 6.0 A and is oriented so that the current direction is 50 S of W. The Earth's magnetic field is due north at this point and has a strength of 0.14  104 T. What is the direction of the force on the wire?

  12. 11. A proton moving with a speed of 3.0  105 m/s perpendicular to a uniform magnetic field of 0.20 T will follow which of the paths described below? (mp = 1.67  1027 kg)

  13. 12. The path of a charged particle moving parallel to a uniform magnetic field will be a:

  14. 13. Magnetism had been a known phenomenon for some time before its relation to electric currents was found. That a current in a wire produces a magnetic field was discovered by:

  15. 14. A current in a long, straight wire produces a magnetic field. The magnetic field lines:

  16. 15. Electrical energy passes down the funnel of a large tornado every second. Measurements taken in Oklahoma at a distance of 9.00 km from a large tornado showed an almost constant magnetic field of 1.50  108 T associated with the tornado. What was the average current going down the funnel?

  17. 16. Two parallel conductors each of 0.50 m length, separated by 5.0  103 m and carrying 3.0 A in opposite directions, will experience what type and magnitude of mutual force? (magnetic permeability in empty space

  18. 17. Superconductors can carry very large currents with no resistance. If a superconducting wire is formed into a solenoid of length 50.0 cm with 500 turns, what is the magnetic field inside the solenoid when the current is 104 A? (µ0 = 4 107 Tm/A)

  19. 18. According to Lenz's law the direction of an induced current in a conductor will be that which tends to produce which of the following effects?

  20. 19. A square coil, enclosing an area with sides 2.0 cm long, is wrapped with 2 500 turns of wire. A uniform magnetic field perpendicular to its plane is turned on and increases to 0.25 T during an interval of 1.0 s. What average voltage is induced in the coil?

  21. 20. A flat coil of wire consisting of 20 turns, each with an area of 50 cm2, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from 2.0 T to 6.0 T in 2.0 s. If the coil has a total resistance of 0.40 , what is the magnitude of the induced current?

  22. 21. A coil is placed in a changing magnetic field and an emf is induced. What happens to the induced emf if the rate of change of magnetic field quadruples?

  23. 22. The basic function of the electric generator is which of the following conversion processes?

  24. 23. A 500-turn circular coil with an area of 0.050 0 m2 is mounted on a rotating frame, which turns at a rate of 20.0 rad/s in the presence of a 0.050 0-T uniform magnetic field that is perpendicular to the axis of rotation. What is the max emf in the coil?

  25. 24. What is the minimum frequency with which a 200-turn, flat coil of cross sectional area 300 cm2 can be rotated in a uniform 30-mT magnetic field if the maximum value of the induced emf is to equal 8.0 V?

  26. 25.

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