Answer:
The current in the wire is 0.0875 A and the drift velocity of the electrons in the wire is 1.77x10^{-6} m/s.
Explanation:
Facts that you know from the problem statement:
Using the diameter of the wire the radius is r=d/2. r=2.6/2= 1.3 mm. It is useful to have the time in seconds so t=80 min = 4800 s. You know the charge Q= 420 C. The concentration of electrons in the wire is n = 5.8*10^{28}.
The current in the wire is the net charge that flows through the area in a second, the units are amperes (A), and it is given by:
Replace the values:
The drift velocity in the electrons in the wire (V) is given by the equation:
Replace the values that you have and the charge of an electron taht is equal to 1.6*10^{-19}
V=1.77x10^{-6} m/s
Answer:
The answer is vA = 4vB
Explanation:
The drift velocity of an electron in a wire is inversely proportional to the resistance in the wire. Therefore, the higher the amount of resistance in the wire, the lower the value of velocity.
To find the answer, we need to figure out how the resistance in each wire would differ with each other on the basis of the given paranater.
We know that the length is the same, the current is the same, and the metal type is the same as well. The difference is the area. Now, resistance is inversely proportional to the area of the wire's cross section which means that a larger cross sectional area would indicate a lower resistance.
Now, wire A has twice the radius of wire B. This means that the cross sectional area of wire A is 4 times larger than the area of wire B (using a simple formular of Pi x R squared). Therefore the resistance of wire A is a quarter of the resistance in wire B.
We can see that due to this, the velocity in wire A would be 4 times the velocity in wire B.
Answer:
See the photo
Explanation:
I can't do the exercise a because you need the Fs to calculate the coefficient of static friction.
Answer:
the greatest number of protons is astatine (At)
No Solution:
4x+10y = 40
2x + 5y = 40
2x - 8y=17
x - 4y = 7
One Solution:
2y - X= 12
2y - 2x =10
x + 10y =50
2x + 10y =90
Infinitely Many Solutions:
x + 2y = 1
3x + 6y= 3
2y - 3x = 5
2/5y -3/5x =1
Explanation: You only had 11 equations listed. But I believe these are the ones you want. I took the test and got them right. Hope it helps