Log In Start studying!

Select your language

Suggested languages for you:
Deutsch (DE)
Deutsch (UK)
Deutsch (US)

Americas

Europe

Answers without the blur. Sign up and see all textbooks for free! → Illustration

Q22CQ

Expert-verified
College Physics (Urone)
Found in: Page 695
College Physics (Urone)

College Physics (Urone)

Book edition 1st Edition
Author(s) Paul Peter Urone
Pages 1272 pages
ISBN 9781938168000

Answers without the blur.

Just sign up for free and you're in.

Register for Free I’ll do it later
Illustration

Short Answer

How does the energy contained in a charged capacitor change when a dielectric is inserted, assuming the capacitor is isolated and its charge is constant? Does this imply that work was done?

Energy is increased by the insertion of dielectric.

See the step by step solution

Step by Step Solution

TABLE OF CONTENTS :
TABLE OF CONTENTS

Step 1: Definition of Dielectric

A dielectric material is a substance that conducts electricity poorly but efficiently supports electrostatic fields.

Step 2: Determining the energy in capacitor

Yes, when a Dielectric is introduced, the energy stored in the capacitor increases because the capacitance increases and energy is proportional to the capacitance. The dielectric decreases the net electric field between the plates due to palarization, thus resulting in lesser voltage. As the charge is constant, the capacitance will be inversely proportional to voltage. Thus, it will increase.

Therefore, dielectric increases energy by increasing capacitance.

Most popular questions for Physics Textbooks

What charge is stored in a 180μF capacitor when 120V is applied to it?

(a) An 8.00 μFcapacitor is connected in parallel to another capacitor, producing a total capacitance of 5.00 μF. What is the capacitance of the second capacitor? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?

(a) A sphere has a surface uniformly charged with \(1.00{\rm{ }}C\). At what distance from its centre is the potential \(5.00{\rm{ }}MV\)?

(b) What does your answer imply about the practical aspect of isolating such a large charge?

What is the capacitance of a large Van de Graaff generator's terminal, given that it stores \(8.00{\rm{ }}mC\)of charge at a voltage of \(12.0{\rm{ }}MV\)?

In nuclear fission, a nucleus splits roughly in half. (a) What is the potential \(2.00 \times {10^{ - 14}}{\rm{ }}m\) from a fragment that has \(46\) protons in it? (b) What is the potential energy in \(MeV\) of a similarly charged fragment at this distance?
Icon

Want to see more solutions like these?

Sign up for free to discover our expert answers
Get Started - It’s free

Recommended explanations on Physics Textbooks

Work Energy and Power

Read explanation

Radiation

Read explanation

Astrophysics

Read explanation

Physics of Motion

Read explanation

Scientific Method Physics

Read explanation

Fluids

Read explanation

Torque and Rotational Motion

Read explanation

Nuclear Physics

Read explanation

Fields in Physics

Read explanation

Measurements

Read explanation

Space Physics

Read explanation

Electricity

Read explanation

Physical Quantities and Units

Read explanation

Medical Physics

Read explanation

Electrostatics

Read explanation

Further Mechanics and Thermal Physics

Read explanation

Mechanics and Materials

Read explanation

Engineering Physics

Read explanation

Energy Physics

Read explanation

Force

Read explanation

Particle Model of Matter

Read explanation

Waves Physics

Read explanation

Magnetism

Read explanation

Modern Physics

Read explanation

Atoms and Radioactivity

Read explanation

Dynamics

Read explanation

Electricity and Magnetism

Read explanation

Conservation of Energy and Momentum

Read explanation

Fundamentals of Physics

Read explanation

Kinematics Physics

Read explanation

Circular Motion and Gravitation

Read explanation

Linear Momentum

Read explanation

Rotational Dynamics

Read explanation

Oscillations

Read explanation

Translational Dynamics

Read explanation

Geometrical and Physical Optics

Read explanation

Thermodynamics

Read explanation

Magnetism and Electromagnetic Induction

Read explanation

Electromagnetism

Read explanation

Electric Charge Field and Potential

Read explanation

Turning Points in Physics

Read explanation

94% of StudySmarter users get better grades.

Sign up for free
94% of StudySmarter users get better grades.