Physics 2092 magnetic field quiz Print Your Name ection No. 1a. Find the directi
ID: 1580144 • Letter: P
Question
Physics 2092 magnetic field quiz Print Your Name ection No. 1a. Find the direction of the foree on an electron the ppe Ib. Find the direction of the current in the wire that would produce d magnetic field directed as shown. 2. An artictews24p, m = 4mp)moves perpendicular to a uniform magnetic field with a speed of 2.0x103 m/s, and experiences a force causing an acceleration of 1.2x10" m/s in the y-direction when its velocity is in the +z direction. Determine the magnitude and direction of the field. 2.0 x (o 9: / 2x10 2.20 -27 1.2.521 x10 3. A wire with a ess of 1.20 g/cm is placed on a horizontal surface with a coefficient of friction of 0.200. The wire carries a current of 1.31 A eastward and moves horizontally the north. What are the magnitude and the direction of the smallest magnetic field that enables the wire to move in this fashion? to 2.0 110 I 1.31A 0.2/ 3s2Explanation / Answer
2. F = m a = (4 x 1.66 x 10^-27) (1.2 x 10^11) j^
F = 7.968 x 10^-16 N j^
v = 2 x 10^5 m/s k^
F = q (v x B)
(7.968 x 10^-16) j^ = (2 x 1.6 x 10^-19) [ (2 x 10^5)k^ X B]
B = 0.01245 T i^
magnitude = 0.01245 T
direction = along +x axis
3. FB = I L B
Friction force, f = u M g
Fb =f
(1.31)(L) (B) = (0.200)(0.12 L)(9.81)
B = 0.180 T ...Ans
direction -> downward