An electron moves in a circle of radius r = 4.52 × 10-11 m with a speed 2.80 × 106 m/s. treat the circular path as a current loop with a constant current equal to the ratio of the electron's charge magnitude to the period of the motion. if the circle lies in a uniform magnetic field of magnitude b = 6.29 mt, what is the maximum possible magnitude of the torque produced on the loop by the field?
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Ответ:
T= 633.51 x 10⁻²⁸ N.m
Explanation:
Given that
r= 4.52 x 10⁻¹¹ m
v= 2.8 x 10⁶ m/s
B= 6.29 mT
We know that charge on electron Q
Q= 1.6 x 10⁻¹⁹ C
The time period t
t=2πr / v
Now by putting the values
t=(2 x π x 4.52 x 10⁻¹¹ ) / (2.80 x 10⁶)
t= 10.13 x 10⁻¹⁷ s
So current I
I = Q/t
I=(1.6 x 10⁻¹⁹)/(10.13 x 10⁻¹⁷)
I= 1.57 mA
The torque T given as
T = I A B
A= π x (4.52 x 10⁻¹¹) ² m²
A= 64.15 x 10⁻²² m²
T = I A B
T = 1.57 x 10⁻³ x 64.15 x 10⁻²² x 6.29 x 10⁻³ M.m
T= 633.51 x 10⁻²⁸ N.m
Ответ:
C)Because of high energy it produces high thermal energy (heat) resulting in increase in temperature of food dish.
HOPE THAT HELPS!!