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The figure shows a 2.0-cm diameter roller that turns at 90 rpm. A 4.0-cm wide plastic...

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 9.5 nC/cm2 . What is the current of the moving film?

The figure shows a 2.0-cm diameter roller that tur

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Answer #1

Angular vel ocity: a)-90 rpm-9.42 rad/s Linear velocity vor- 9.42x-9.42 m/s Area for every second: = wv 9.42 x 4 = 37.68 cm.

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