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dewsae dewsae
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2 years ago
The figure shows a 2.0-cm diameter roller that turns at 90 rpm. A 4.0-cm wide plastic film is being wrapped onto the roller, and this plastic carries an excess electric charge having a uniform surface charge density of 5.0 nC/cm2. What is the current of the moving film?




▸ 11 μA

▸ 190 nA

▸ 23 μA

▸ 30 nA
Textbook 
Essential University Physics

Essential University Physics


Edition: 3rd
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faulkeerybfaulkeeryb
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