College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 17 - Conceptual Questions - Page 650: 20


see solution

Work Step by Step

The voltage remains constant as the capacitor is connected the whole time. When the dielectric is removed the capacitance decreases by a factor of 3. Since Q =CV and V remains constant , Q is decreased 3 times. The electric field remains constant. And the energy decreases 3 times too.
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