Question

In the equation F = ILB, 1. if the current and the magnetic field are parallel,...

In the equation F = ILB,

1. if the current and the magnetic field are parallel, F = 0

2. if the current and magnetic field are perpendicular, F = 0

3. if the current is zero, F is at a maximum

4. if the magnetic field is zero, F is at a maximum
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Answer #1

The more accurate equation in vector form is

Where direction of L is the direction of the current.

The equation in scalar form becomes

Where theta is the angle between the direction of current and the direction of the magnetic field.

So, if the current and magnetic field is parallel, the angle becomes zero and hence the force becomes zero.

So, the only correct option is

1. If the current and the magnetic field are parallel, F = 0.

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