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A very long insulating cylindrical shell of radius 6.20cm carries charge of linear density 8.70uC/m spread uniformly over its outer surface. What would a voltmeter read if it were connected between the surface of the cylinder and a point 4.70cm above the surface, and Delta V = ____ V

What would a voltmeter read if it were connected between the surface and a point 1.00cm from the central axis of the cylinder?

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