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1) l n the figure. an electron accelerated from rest through potential difference V:=0.9 M M! enters the gap between two parallel plates having separation
1) l n the figure. an electron accelerated from rest through potential difference V:=0.9 M M! enters the gap between two parallel plates having separation d = 26.8 lTll'l1 and potential difference 16\" 90.0 V. The lower plate is at the lower potential. Neglect fringingand assumethatthe electron's velocity vector is perpendicular to theelectric field vector betweenthe plates. in unit-vector notation. whatuniform magnetic field allows the electron to travel in a straight line inthe gap? 1': T m -== L. W Hi. | l ' i 2: " 2] Figure [all shows an element or length a? - 1.13 Iitrn in a VEI'Y lo ng straight wire ca rrying current. The current in that element sets up a differential magnetic eld dB-Oa'o at points in the surrounding space. Figure it!) gives the magnitude 0'3 of the eld for points 4.2 cm from the element. as a function of angle 0 between the wire and a straight line to the point. The vertical scale is set by GE - 60.? pT.What is the magnitude of the magnetic eld setup by the entire wire at perpendicular distance 4.2 cm irorn the wire? 3] The circuit of the gure shows a capacitor. two ideal batteries, two resistors. and a switch S. Initially S has been open for a long time. II it is then closed for a long tirne,what is the change in the charge on the capacitor? Assume C: 35 |JF_, 51 = 3,? v, 52 = 5,? v, R1 = o 32 o, and m = 0,43 0
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