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Physics Q5 review page

Physics Q5 review page - M $ I 0:0 m I electron 1 A long...

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Unformatted text preview: M $ I 0.:0 m' I electron 1. A long straight wire carries a 40.0 A current in the +x direction. At a particular instant, an electron moving at 1.0 x 107 m/s in the +y direction is 0.10 m from the wire. What is the force on the electron at this instant? Mrm l/LM Meg ou‘llUC. elm can 310:: WW @2516:— 3W 6“ 40H :/:K:X;V B 2. A wire of length L is formed into a square It is placed in a uniform magnetic field whose magnitude is 3T. The plane of the square is perpendicular to the direction of the B field. If the magnetic flux through the square is found to be 3 T-m ,What is the length L of the wire? FEE i scrap. 5196011290 =A-g=[I___)tB = ET-WIL '32— Li 1 3. The magnetic field at the center of a loop of wire with i turn of radius 0.1 meters is 2 x 10" Tesla. What current is the loop of wire carrying? ET? B i/l/loI :_ l5 2; 1 7,]; M = (mp (in) awe “Tl ‘lrrxw 7) 3: = 82A 4. A coil of wire carries current I as shown in the figure. If an observer could “see" the magnetic field inside the coil from the end as indicated in the figure, what drawing would indicate most closely what she saw? (Assume her eye is very close to the end of the coil) 0.0.09 (Di/Meghan c? We: W T‘ 42K” - acacia —l:ll“§3i§l e; on V ~l2ll“ 61 T] S m E (IS—HR Thwh 0:50:43 WlD‘b-WH/t (a) 5. A solenoid has 20 tums/ centimeter. What current would the solenoid have to carry if the B field measured in the center of fire solenoid were 0.01 Tesla? "B Bg/Mofll :> M f; ML 3 (Li fixto‘ 7) (3&0 3 ynmrs in cm nz‘l‘OWH/J lit/1:64 L ’I'FT/‘i flefla+IiJL C l’qu‘? fl 613$ l9 b": ”5 ”Mi/M29 1. A proton traveling due west in a region that contains oniy a magnetic field experiences a vertically upward force (away from the surface of the earth). What is the direction of the magnetic field? 3. "ON: N l b_ easth ‘0— Z/ Force, owl" cg Gastric .. 53%] is {King 2. A long, straight wire carries a 6.0—A current that is directed in the positive x direction. When a uniform magnetic field is applied perpendicular to a 3.0-m segment of the wire, the magnetic force on the segment is 0.36 N, directed in the negative y direction, as shown. What are the magnitude and direction of the magnetic field? 1 y I LlBl -1l"—, L. a. 0.020 T, into the paper 45.02“? b. 0.060 T, out of the paper c. 0.020 T, out of the paper d. 0060 T, into the paper e. 0.65 T, out of the paper 3’ F: 3. A circular coil consists of 5 loops each of diameter 1.0 m. me can Is placed In an external mag-mic field of 0.5 T. When the coil carries a current of 4.0 A, a torque of magnitude 3.93_N-m acts on It.‘ Determine the angle between the normal to the plane of the coil and the direction of the magnetic W (at «W :3; - NATLBMi WW? Wk .. so. . “is“ e. 90' 6V”? '3: WM nwmfli (‘0 m Ma '3 WW 4. The radius of a coil of wire with N turns is r = 0.28 m. A clocmise 1 . current of log“ = 1.0 A flows in the coil, as shown. A long, straight wire carrying a current lwire = 29 A toward the left is located 0.04 m from the edge of the coil The magnetic field at the center of the coil is zero Tesla. Determine N, the number of turns. Infidel at“ W a.2 6- _,_ M J4me. »_ l9 W 2W) e.1 ”it’d .29 J's—:8 714,0 thw :flL‘f—leilfi‘zr W3 (.23) 5. Which one of the following statements best explains why a constant magnetic field can do no work on a moving charged particle? a. The electric field associated with the particle cancels the effect of the magnetic field on the particle. b. The magnetic field is conservative. c. The magnetic force is a velocity dependent force. d. The magnetic field is a vector and work is a scalar quantity. e. The magnetic force is always perpendicular to the velocity of the particle. ...
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