Learning Materials
Features
Discover
Chapter 17: Q18Q (page 473)
We have seen that the capacitance C depends on the size and position of the two conductors, as well as on the dielectric constant K. What then did we mean when we said that C is a constant in Eq. 17鈥�7?
The capacitance does not rely on charge and voltage.
Over 30 million students worldwide already upgrade their learning with 91影视!
All the tools & learning materials you need for study success - in one app.
Get started for free
(III) How much voltage must be used to accelerate a proton (radius \({\bf{1}}{\bf{.2 \times 1}}{{\bf{0}}^{{\bf{ - 15}}}}\;{\bf{m}}\)) so that it has sufficient energy to just 鈥渢ouch鈥� a silicon nucleus? A silicon nucleus has a charge of \( + 14e\), and its radius is about \({\bf{3}}{\bf{.6 \times 1}}{{\bf{0}}^{{\bf{ - 15}}}}\;{\bf{m}}\). Assume the potential is that for point charges.
(II) A \({\bf{ + 35}}\;{\bf{\mu C}}\) point charge is placed 46 cm from an identical \({\bf{ + 35}}\;{\bf{\mu C}}\) charge. How much work would be required to move a \({\bf{ + 0}}{\bf{.50}}\;{\bf{\mu C}}\) test charge from a point midway between them to a point 12 cm closer to either of the charges?
Question:Dry air will break down if the electric field exceeds \({\bf{3}}{\bf{.0 \times 1}}{{\bf{0}}^{\bf{6}}}\;{\bf{V/m}}\). What amount of charge can be placed on a parallel-plate capacitor if the area of each plate is \({\bf{65}}\;{\bf{c}}{{\bf{m}}^{\bf{2}}}\)?
A proton \(\left( {{\bf{Q = + e}}} \right)\) and an electron \(\left( {{\bf{Q = - e}}} \right)\) are in a constant electric field created by oppositely charged plates. You release the proton from near the positive plate and the electron from near the negative plate. Which feels the larger electric force?
(a) The proton.
(b) The electron.
(c) Neither鈥攖here is no force.
(d) The magnitude of the force is the same for both and in the same direction.
(e) The magnitude of the force is the same for both but in opposite directions.
Question: How does the energy stored in an isolated capacitor change if (a) the potential difference is doubled, or (b) the separation of the plates is doubled?
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Flashcards 
91影视 AI 
Notes 
Study Plans 
Study Sets 
Find a degree 
Magazine