A current of 19.0 mA is maintained in a single circular loop with a circumference of 2.15 m. A magnetic field of 0.705 T is directed parallel to the plane of the loop. What is the magnitude of the torque exerted by the magnetic field on the loop?
N · m
A proton travels with a speed of 4.95 ✕ 106 m/s at an angle of 65° with the direction of a magnetic field of magnitude 0.210 T in the positive x-direction.
(a) What is the magnitude of the magnetic force on the
proton?
N
(b) What is the proton's acceleration? (Give the magnitude.)
m/s2
Solution 1)
First, lets find
Radius of the circle from the given data
R = C/2π =2.15 m/2π = 0.342 m
Now,
area =S= πR^2 =0.367 m^2
Now, magnitude of torque ,τ = B*I*S =0.705*19x10^-3*0.367 = 0.0049
N.m (Ans)
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