* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download 5) – z (into page)
Magnetosphere of Saturn wikipedia , lookup
Geomagnetic storm wikipedia , lookup
Maxwell's equations wikipedia , lookup
Skin effect wikipedia , lookup
Friction-plate electromagnetic couplings wikipedia , lookup
Edward Sabine wikipedia , lookup
Mathematical descriptions of the electromagnetic field wikipedia , lookup
Electromotive force wikipedia , lookup
Magnetic stripe card wikipedia , lookup
Superconducting magnet wikipedia , lookup
Magnetic field wikipedia , lookup
Magnetic nanoparticles wikipedia , lookup
Neutron magnetic moment wikipedia , lookup
Magnetometer wikipedia , lookup
Magnetic monopole wikipedia , lookup
Electromagnetism wikipedia , lookup
Earth's magnetic field wikipedia , lookup
Giant magnetoresistance wikipedia , lookup
Electromagnetic field wikipedia , lookup
Magnetotellurics wikipedia , lookup
Multiferroics wikipedia , lookup
Magnetotactic bacteria wikipedia , lookup
Magnetohydrodynamics wikipedia , lookup
Magnetoreception wikipedia , lookup
Force between magnets wikipedia , lookup
Electromagnet wikipedia , lookup
Magnetochemistry wikipedia , lookup
Lorentz force wikipedia , lookup
ConcepTest PowerPoints Chapter 20 Physics: Principles with Applications, 6th edition Giancoli © 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students except by instructors using the accompanying text in their classes. All recipients of this work are expected to abide by these restrictions and to honor the intended pedagogical purposes and the needs of other instructors who rely on these materials. ConcepTest 20.1a Magnetic Force I 1) A positive charge enters a 1) out of the page uniform magnetic field as shown. What is the direction of the magnetic force? 2) into the page 3) downwards 4) to the right 5) to the left x x x x x x v x x x x x x x x x xq x x ConcepTest 20.1b Magnetic Force II 2) A positive charge enters a 1) out of the page uniform magnetic field as shown. What is the direction of the magnetic force? 2) into the page 3) downwards 4) upwards 5) to the left x x x x x x x x x x vx x q x x x x x x ConcepTest 20.1c Magnetic Force III 3) A positive charge enters a 1) out of the page uniform magnetic field as shown. What is the direction of the magnetic force? 2) into the page 3) zero 4) to the right 5) to the left v q ConcepTest 20.1d Magnetic Force IV 4) A positive charge enters a 1) out of the page uniform magnetic field as shown. What is the direction of the magnetic force? 2) into the page 3) zero 4) to the right 5) to the left v q ConcepTest 20.2 Atomic Beams 5) A beam of atoms x x x x x x x x x 1x x x enters a magnetic field x x x x x x x x x x x x region. What path will x x x x x x x x x x x x the atoms follow? x x x x x x x x x x x x x x x x x x x x x x x x 4 x x x x x x x x x x x x 2 3 ConcepTest 20.3 Magnetic Field 6) A proton beam enters into a magnetic field region as shown below. What is the direction of the magnetic field B? 1) + y 2) – y 3) + x 4) + z (out of page) 5) – z (into page) y x ConcepTest 20.4a Mass Spectrometer I x x x x x x x x x x x x 7) Two particles of the same x x x x x x x x x x x x mass enter a magnetic field with the same speed and follow the paths shown. Which particle has the bigger charge? x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 1 2 3) both charges are equal 4) impossible to tell from the picture ConcepTest 20.4b Mass Spectrometer II 8) A proton enters a 1) it increases uniform magnetic field that is perpendicular to the proton’s velocity. What happens to the kinetic energy of the proton? 2) it decreases 3) it stays the same 4) depends on the velocity direction 5) depends on the B field direction x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x ConcepTest 20.5 Velocity Selector 9) What direction would a B field 1) up (parallel to E ) have to point for a beam of electrons moving to the right to go undeflected through a region where there is a uniform electric field pointing vertically upward? 2) down (antiparallel to E ) 3) into the page 4) out of the page 5) impossible to accomplish E B=? electrons v ConcepTest 20.6a Magnetic Force on a Wire I 1) left 10) A horizontal wire carries a 2) right current and is in a vertical 3) zero magnetic field. What is the 4) into the page direction of the force on the wire? 5) out of the page I B ConcepTest 20.6b Magnetic Force on a Wire II 1) left 11) A horizontal wire carries a 2) right current and is in a vertical 3) zero magnetic field. What is the 4) into the page direction of the force on the wire? 5) out of the page I B ConcepTest 20.7a Magnetic Force on a Loop I 1) + x 12) A rectangular current 2) + y loop is in a uniform magnetic 3) zero field. What is the direction of 4) - x the net force on the loop? 5) - y B z y x ConcepTest 20.7b Magnetic Force on a Loop II 1) move up 13) If there is a current 2) move down in the loop in the 3) rotate clockwise direction shown, the 4) rotate counterclockwise loop will: 5) both rotate and move B field out of North B field into South N S N S ConcepTest 20.8a Magnetic Field of a Wire I 14) If the currents in these wires 1) direction 1 have the same magnitude, but 2) direction 2 3) direction 3 opposite directions, what is the 4) direction 4 direction of the magnetic field at 5) the B field is zero point P? 1 P 4 2 3 ConcepTest 20.8b Magnetic Field of a Wire II 15) Each of the wires in the figures below carry the same current, either into or out of the page. In which case is the magnetic field at the center of the square greatest? 1 B=? 2 B=? 1) arrangement 1 2) arrangement 2 3) arrangement 3 4) same for all 3 B=? ConcepTest 20.9a Field and Force I 16) A positive charge moves 1) + z (out of page) parallel to a wire. If a current is 2) - z (into page) suddenly turned on, which 3) + x direction will the force act? 4) - x 5) - y y +q x z I ConcepTest 20.9b Field and Force II 17) Two straight wires run parallel to each other, each carrying a current in the direction shown below. The two wires experience a force in which direction? 1) toward each other 2) away from each other 3) there is no force ConcepTest 20.10 Current Loop 1) left 18) What is the direction of 2) right the magnetic field at the 3) zero center (point P) of the 4) into the page square loop of current? 5) out of the page I P