Question

Fill in the blanks:

The force on a linear current carrying conductor in magnetic field is half the maximum value when it makes an angle of ________ with the magnetic field.

• A. ${30}^0$
• B. ${60}^0$
• C. ${45}^0$
• D. ${15}^0$

Answer 1

Answer: (A)

${30}^0$

$\overrightarrow{F}=i(\overrightarrow{l}\times \overrightarrow{B})$
$=ilBsin\theta$
So, $sin\theta$ is $\frac{1}{2}$ when $\theta ={30}^0$