Question

Find the approximate value of torque obtained through the induced current.

• A. $\frac{B^2{L}^2\omega d{t}^2}{\rho }$
• B. $\frac{B^2{L}^2\omega d{t}^3}{\rho }$
• C. $\frac{B^2{L}^2\omega d^{2}t}{\rho }$
• D. $\frac{B^{2}L\omega d^2{t}^2}{\rho }$

Answer 1

Answer: (C)

$\frac{B^2{L}^2\omega d^{2}t}{\rho }$

$F=IlB=\frac{B^2{L}^2\omega dt}{\rho }$
$\tau =F\left(d\right)=\frac{B^2{L}^2\omega d^{2}t}{\rho }$