L = Panjang kawat = 12 m
B = Medan magnet = 90 T
I = Kuat arus = 0,02 mA = 2 x 10-5 A
Ditanya F = Gaya Lorentz ?
Pembahasan: F = B.I.L
F = 90 x 2 x 10-5 x 12
F = 216 x 10-4 N
F = 0,0216 N
2. Diketahui :
F = Gaya lorentz = 1 N
L = Panjang kawat = 5 m
I = Kuat arus = 2 mA = 2 x 10-3A
Ditanya B = Medan magnet ?
Pembahasan: B = F / I x L