Q. 355.0( 1 Vote )

# Doubly ionized he

Given-

Speed of the helium ions, v = 10 km s−1 = 104 m/s

Uniform magnetic field, B = 1.0 T

Charge on the helium ions = 2e

Mass of a helium ion, m = 4×1.6×10-27 Kg

(a) The force acting on an ion –

Magnetic force, we know, Lorentz force F is given by - where,

e = charge on an electron

v = velocity of the electron

B=magnetic field

θ= angle between B and v   (b) The radius of the circle is given by, where,

m is the mass of a proton

v= velocity of the particle

B = magnetic force

q= charge on the particle   (c) The time taken by an ion to complete the circle,

we know  Since the total time taken for a complete cycle will be its circumference and the velocity is V -   Rate this question :

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