Question

A very long ("infinity") wire, straight and horizontal, conducts a current in the negative "x-axis" direction such that 3.5 x 1018 electrons per second pass through its cross section. a) What are the magnitude and direction of the magnetic field produced by this wire at a point 4.00 cm above it? b) What acceleration will a particle experience, at that same point, which has a charge of 7 uc, a measured mass that is 50 times that of an electron and that moves in the direction of the axis of the wire, with a speed of 4 the speed of light in a vacuum?

Answer 1

Noumber of e 3.5 x 10 У ) į IS 3.5X10 xe where, 7 2 i q - charge of -y 18 -19 x 106 x 10 - ) om 3.5X10 5.607x10 2 0.5607 Ź 7 above, rat B Hence. 4 cm Mi sino, & sind, ) B) 2 uad 7 Gaxio x 0.5607 [141] 47 x G x 102 -6 2.8 x 10 T 18

Hence, -6 B T 2.8x10 2.89 b) z q m 2 uc 50kme I And 8 ū. -7 -7.5x 10 3x10 ۔ 4 and 6 A 2.8x10 - to M Hence, 7 To 2 q(HxB) [+xno 7.5*10 i (3.8x16 krój 41.541910. (11) -1.47 xio -3 DI k

and ma -3a 1.47 x 10 to tale D el .31 m 50 x 911x10 26 2 x (-) m/s? 3. 927 x 10 키 To BA 26 - 3.227xlo Ŕ m/s²