CAPE Physics Unit 2 · 2007 · Paper 1 · Question Q39
The diagram shows the set up for a Millikan's oil drop experiment.
A variable voltage, V, is applied between the plates \text{X} and \text{Y}, which are separated by a distance, d. The microscope is focussed on a charged oil drop of mass, m, which is held stationary between the plates. If q is the charge on the oil drop, which of the following expressions is correct?
- (A)
q = mgV/d - (B)
q = mg/Vd - (C)
q = V/mgd - (D)
q = mgd/V
This question uses a figure or table from the paper — you'll see it when you practise.
The answer is shown once you've answered.
Practise this question