Question

If a conductor carrying current is kept in the magnetic field, the magnitude of force on the electric conductor will be maximum when :

• A. The conductor makes an angle of ${30}^o$ with the magnetic field
• B. The conductor makes an angle of ${60}^o$ with the magnetic field
• C. The conductor makes an angle of ${90}^o$ with the magnetic field
• D. The conductor makes an angle of ${45}^o$ with the magnetic field

Answer 1

The correct option is C The conductor makes an angle of ${90}^o$ with the magnetic field

The force due to rod of length $l$ in a magnetic field

$\overrightarrow{F}=I(\overrightarrow{l}\times \overrightarrow{B})$

The magnitude of force on the electric conductor will be maximum when

$sin\theta =1$

$\theta ={90}^0$

$F=IlB$

The conductor makes an angle of ${90}^0$ with the magnetic field.

So, option C is correct.