To calculate the force on a wire carrying current in a magnetic field, you can use the formula:
F = BIL
Where:
F = force
B = magnetic field strength (0.40 T)
I = current (4.0 A)
L = length of wire (0.20 m)
Plugging in the values:
F = (0.40 T)(4.0 A)(0.20 m)
F = 0.32 N
Therefore, the force on the 0.20 m straight wire carrying 4.0 A of current in a magnetic field with a strength of 0.40 T is 0.32 N.
