An alpha particle (doubly ionized He atom <no electrons orbiting>) is created in

Question

An alpha particle (doubly ionized He atom <no electrons orbiting>) is created in a vacuum in the center between our pair of Helmholtz coils horizontal (in the xy plane) and accelerated by an electrical potential of V volts. a current of 5 ampers is applied to the coils.

a)what is the magnetic field B in the center of the Helmholtz coils?

b) what would the accelerating voltage V need to be in order for the particle to travel in a circle with radius 10 cm?

c)how fast would the particle be traveling?

Explanation / Answer

magnetic field at centre B = 4u0ni/5sqrt5 a

B= 4*4pi*10^-7 *5/5*2.23*0.05

B =4.5*10^-7 T

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