8a Give all the possible correct answer for the charge b The

8.a Give all the possible correct answer for the charge. b. The speed of the charge is 0.360E+8 m/s. Calculate the magnitude of the charge. c. The path of the charge in magnetic field is a circle. Assume that the charge is positive and has a mass of 1.673E-27kg, the mass of a proton. What is the radius of the circle?

Solution

magnetic force, Fm = q (v X B)    { cross product }

|Fm| = |q||v| |B| |sin@|

where @ is the angle between v and B.

8.

q = negative = -

B = west = -i

Fm = out of page = +k

+k = - ( v X (-i) )

k = v x i

cross product of -j and i is k

hence v = -j = south

and when Q is +ve then v is north.

Ans( BC )

9.
|Fm| = |q||v| |B| |sin@|

0.680 x 10^-11 = q ( 0.360 x 10^8 ) ( 1.18) (sin90)

q = 1.6 x 10^-19 C