Multiple Choice: 4 Points Each Any answers NOT recorded on the Scantron answer A
ID: 2036542 • Letter: M
Question
Multiple Choice: 4 Points Each Any answers NOT recorded on the Scantron answer A wire runs along the left edge of this page. If the free electrons in the wire are going down the edge of page will NOT be counted the page, what is the direction of the magnetic field with respect to the middle of the page (point A)? A) The field will go through point A from the left to the right across the page. B) The field will be directed into the page at point A C The field will go through point 4 ftom the bom to to of ae D) The field will be directed out of the page at point A. E) The field will be directed diagonally through point A from the upper left to lower right of the page. 10. A material which has no resistance (usually at a very cold temperature) is known as ata) A) ideal insulator C) perfect resistor 11. Whose law expressed by the formula, EN/t), is used to determine the magnitude of the emf induced in a coil through which there is a changing magnetic flux? A) Ampere B) Coulomb C) Faraday D) Lenz E) Maxwell 12. Relative to the page what is the direction of the force on a positive charged particle moving down the page through a uniform magnetic field which is directed left to right across the page? A) right B) left C) up D) down E) into the page F) out of the page "The sum of the currents entering a junction is equa to the sum of the currents he statement that leaving the junction." - is associated with which individual? F) Ohm A) Ampere B) Coulomb C)Einstein D) Faraday ) Kirchhoff What is Michael Faraday noted for? A) He unified the fields of electricity and magnetism into the single field of electromagnetism. B) Rewriting Ampere's Law to include a displacement current C) He wrote the rule for determining the direction of an induced emf in a conducting loop in a changing 14. magnetic flux. D) His formula for calculating the strength of an induced emf. E) He discovered that a current through a wire will cause the needle of a nearby compass to deflect.Explanation / Answer
(9) Since free electron is moving downward therefore the current will be in upward direction, therefore the
magnetic field at the point A will be into the page according to the right hand rule.
hence the correct option is "B".
(10) It is superconductor therefore the asnswer will be "D".
(11) Law is given by Lenz, therfore the answer will be "D".
(12) We know that
Force =q [v x B]
hence from the product rule the direction of the force will be out of the page.
Hence the correct option is "F".
(13) E
(14)D
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