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Week 4 Quiz
Enter you last name beginning with a capital letter (E.g. Urminsky)
Two thin cylindrical shells of equal length, one of radius R the other of radius 2R surround an isolated infinitely long line of charge. The ratio of the electric flux through the larger cylinder to the flux through the smaller cylinder is
A conducting sphere of radius 3.0 mm carries a charge of 4.0 micro-coulombs. An electron is placed inside the sphere at a point 1 mm from the centre. The electric force on the electron is
1.44 x 10^-9 N
5.76 x 10^-9 N
3.87 x 10^-8
none of the above
A positive point charge is enclosed in a hollow metallic sphere. At a point directly above the hollow sphere, the electric field caused by the enclosed positive charge has
diminished to zero
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