A-LevelPhysicsElectric fieldsOct/Nov 2016Paper 1 Q311 Mark
An oil drop has mass m and charge q. The drop is held stationary in an electric field between two parallel horizontal plates, distance d apart, as shown. [Figure 31.1] The potential difference between the plates is V and the acceleration of free fall is g. What is the charge-to-mass ratio q/m of the oil drop?
Agd/V
BV/(dg)
CgV/d
Dd/(Vg)
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