A circuit element having terminals a and b has and Over a period of 20 seconds, how much charge moves through the element? If electrons carry the charge, which terminal do they enter? How much energy is transferred? Is it delivered to the element or taken from it?
Solved
Show answers
More tips
- C Computers and Internet How to Delete a Page on VKontakte: The Ultimate Guide from Experts...
- S Style and Beauty 5 Tips for Choosing the Best Ugg Boots...
- H Health and Medicine How to Treat the Flu: A Comprehensive Guide...
- H Health and Medicine Effective Ways to Treat Colic in Infants...
- C Computers and Internet IMHO: What is it, why is it important, and how to use it?...
- F Food and Cooking How to Calculate the Gender of Your Child with Blood?...
- S Style and Beauty How to Get Rid of Under Eye Bruises?...
- C Cities and Countries What time does the Metro open in Moscow?...
- W Work and Career Where can you learn to be a flight attendant?...
- H Health and Medicine What are Electronic Cigarettes? The Ultimate Guide...
Answers on questions: Physics
- C Chemistry Cho các chất sau : CaO, FeO, CO2, N2O5, SO2, SO3, CuO,CO,MgO, Al2O3, Cl2O7, ZnO, P2O5, NO2, BaO, Fe2O3. Xác định oxit axit, oxit bazơ, oxit trung tính ,oxit lưỡng tính và...
- M Mathematics A jar contains 6red jelly beans, 4green jelly beans, and 4blue jelly beans. If we choose a jelly bean, then another jelly bean without putting the first one back in the jar,...
- B Biology Abarometer is used to measure a. wind speed c. air pressure b. wind direction d. precipitation location...
Ответ:
Incomplete question
Complete question:A circuit element having terminals a and b has vab=10V and iba=2A. Over a period of 20 seonds, how much charge moves through the element? If electrons carry the charge, which terminal do they enter? How much energy is transferred? Is it delivered to the element or taken from it?
q(t)=40C and w(t) = -400j
The energy is delivered by the circuit element. The electrons through the terminal a
Explanation:
1. We were give the following data
V(t) = V(ab) = 10V, I(t) = I(a) = 2A
Current flows down terminal b toward a. Terminal a is positive reference while terminal b is negative reference.
2. The net charge which moves through the element over a period of t = 20s can be determined by the following equation.
q(t) = integral{(20)-(0)}dt
= 2{20-0}
= 40C
3. The current(positive charge) flows from terminal b towards terminal a. Then the negative charge flows in opposite direction from terminal a towards terminal b. The electrons enter terminal a.
4. W(t) = integral { (20)-(0)}dt
= -20integral {(20)-(0)}
= -20(20-0)
= -400j
5. Energy is absorbed by an element when the positive charge moves from positive to negative reference. In pur case positive charge moves from negative reference b to positive reference a. Hence, energy is delivered by the circuit elements because of that transferred energy in previous case is a negative sign.
Ответ: