I was wondering if emf (electromotive force) can be negative?
And what formula would you suggest to use for the following question?
Q1.2
A model plane has wings that are each 2.55m long. If the plane is travelling at 84.0km/h in a region where Earth's magnetic field has a vertical component of
T. What emf could be produced in the wing?
![](https://latex.codecogs.com/png.latex?\bg_white (A) 0.39 V)
![](https://latex.codecogs.com/png.latex?\bg_white (B) 0.039 V)
![](https://latex.codecogs.com/png.latex?\bg_white (C) 48.5 V)
![](https://latex.codecogs.com/png.latex?\bg_white (D) 4.85 V)
And what formula would you suggest to use for the following question?
Q1.2
A model plane has wings that are each 2.55m long. If the plane is travelling at 84.0km/h in a region where Earth's magnetic field has a vertical component of