What about Ampere force

1. F = bil
with the left hand, the four fingers point to the current direction, and let the magnetic inction line pass through the palm of the hand. The thumb is perpendicular to the four fingers. The direction of the thumb is the direction of the force

2. F = bil (magnetic inction line, current direction and Ampere force direction are perpendicular, otherwise they must be decomposed orthogonally) f: Ampere force B: magnetic inction intensity I: current intensity through wire L: effective length of cutting magnetic inction line

3. F=BIL The direction is left-handed. Can be asked

4. F=ILB

5. F = bil (bil must be vertical)

6. F = bil (magnetic inction line, current direction and Ampere force direction are perpendicular, otherwise they must be decomposed orthogonally) f: Ampere force B: magnetic inction intensity I: current intensity through wire L: effective length of cutting magnetic inction line

8. The sliding force along the inclined plane is equal to the upward component of the electromagnetic force along the inclined plane. It's the minimum force. If it's smaller, the wire will slide
the direction of the magnetic field should be downward. With the left-handed rule, the force is upward
the strength of the magnetic field is calculated according to the current strength and magnetic field strength. You should know the formula.

9. Who can't afford his hometown

10. The moment l = RF, f is the force, and R is the distance from the force to the selected center of rotation