MCQs: Charges in a B field
Charges in a B field
The earth's magnetic field acts like a magnetic bottle trapping the charged particles coming from the sun, they spiral back and forth along the field lines only getting close to the atmosphere at the poles.
Paths have same redius so mass is the same but force is in opposite directions so must have opposite charge.
B is positive and A is negative.
Current opposite to charge movement use Flemmings left hand rule.
Current same direction as charge. use Flemmings left hand rule.
F = BIL
I =V/R so F = BVL/R
R= BVL/F = 0.05 x 6 x 0.03/1x10-3 = 9Ω
Because its not next to the angle.
F = BIL = 10 x 10-3 x 5 x 0.04 = 0.002
Flemings left hand rule.
Current is parallel with field.
Flemmings Left hand rule.