### Capacitor Problem 9.4.2

#### Description

The capacitance of a parallel plate capacitor can be altered
by dragging (drag from the middle) a conducting block in between the two plates (charge given in mC
and position given in centimeters). The light red and light blue circles
represent the position of the charge on the conductor.

#### Question

What is the
ratio of the new capacitance to the old capacitance? *Note: There is a
1-5% intrinsic error in the calculation of charge.* Start

#### Answer

1.7.

#### Reference

See Giancoli-PA: 17-7, Giancoli-SE: 24-3.

#### Credits

Physlet problem authored by Mario Belloni.

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