The dielectric in a capacitor serves two purposes. It increases the capacitance, compared to an otherwise identical capacitor with an air gap, and it increases the maximum potential difference the capacitor can support. If the electric field in a material is sufficiently strong, the material will suddenly become able to conduct , creating a spark. The critical field strength, at which breakdown occurs, is 3.0 MV/m for air, but 60 MV/m for Teflon. a. A parallel-plate capacitor consists of two square plates, 15 cm on a side, spaced 0.50 mm apart with only air between them. What is the maximum energy that can be stored by the capacitor? b. What is the maximum energy that can be stored if the plates are separated by a 0.50-mm-thick Teflon sheet?
The dielectric in a capacitor serves two purposes. It increases the capacitance, compared to an otherwise identical capacitor with an air gap, and it increases the maximum potential difference the capacitor can support. If the electric field in a material is sufficiently strong, the material will suddenly become able to conduct , creating a spark. The critical field strength, at which breakdown occurs, is 3.0 MV/m for air, but 60 MV/m for Teflon. a. A parallel-plate capacitor consists of two square plates, 15 cm on a side, spaced 0.50 mm apart with only air between them. What is the maximum energy that can be stored by the capacitor? b. What is the maximum energy that can be stored if the plates are separated by a 0.50-mm-thick Teflon sheet?
The dielectric in a capacitor serves two purposes. It increases the capacitance, compared to an otherwise identical capacitor with an air gap, and it increases the maximum potential difference the capacitor can support. If the electric field in a material is sufficiently strong, the material will suddenly become able to conduct, creating a spark. The critical field strength, at which breakdown occurs, is 3.0 MV/m for air, but 60 MV/m for Teflon.
a. A parallel-plate capacitor consists of two square plates, 15 cm on a side, spaced 0.50 mm apart with only air between them. What is the maximum energy that can be stored by the capacitor?
b. What is the maximum energy that can be stored if the plates are separated by a 0.50-mm-thick Teflon sheet?
Solve and answer the question correctly please. Thank you!!
r
2. Measuring Length
mm 1
cm
2
3
INCH 1 16THS
5 6 7 8 9
10 11
FAIRGATE COLD SPRING, NEW YORK
2
3
12
1.
Using the metric (top) scale only, what units are being used for the long lines
with the numbers? Hint: Remember that 2.54 cm = 1 in.
2.
What are the units of the small lines?
3. How many decimal places should be recorded using this tool?
4. What is the length of the red line? Note: Make sure to use the correct units
and decimal places.
5. Now observe your ruler. What metric units are used on your ruler?
6. How many decimal places should you record when using your ruler?
7.
Measure a box, book, coin and can and fill out the data table below. Make
sure to use units and the correct number of decimal places for your ruler.
Table 1: Measuring Length Data Table
Object
Length of the box
Length
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V
2
217
PROBLEM 3
Cables A and B are Supporting a 185-lb wooden crate.
What is the magnitude of the tension force in each
cable?
A
20°
35°
185 lbs
Chapter 21 Solutions
Student Workbook for College Physics: A Strategic Approach Volume 1 (Chs. 1-16)
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