Answer:
(a) 0.345 T
(b) 0.389 T
Solution:
As per the question:
Hall emf, ![V_{Hall} = 20\ mV = 0.02\ V](https://tex.z-dn.net/?f=V_%7BHall%7D%20%3D%2020%5C%20mV%20%3D%200.02%5C%20V)
Magnetic Field, B = 0.10 T
Hall emf, ![V'_{Hall} = 69\ mV = 0.069\ V](https://tex.z-dn.net/?f=V%27_%7BHall%7D%20%3D%2069%5C%20mV%20%3D%200.069%5C%20V)
Now,
Drift velocity, ![v_{d} = \frac{V_{Hall}}{B}](https://tex.z-dn.net/?f=v_%7Bd%7D%20%3D%20%5Cfrac%7BV_%7BHall%7D%7D%7BB%7D)
![v_{d} = \frac{0.02}{0.10} = 0.2\ m/s](https://tex.z-dn.net/?f=v_%7Bd%7D%20%3D%20%5Cfrac%7B0.02%7D%7B0.10%7D%20%3D%200.2%5C%20m%2Fs)
Now, the expression for the electric field is given by:
(1)
And
![E_{Hall} = V_{Hall}d](https://tex.z-dn.net/?f=E_%7BHall%7D%20%3D%20V_%7BHall%7Dd)
Thus eqn (1) becomes
where
d = distance
(2)
(a) When ![\theta = 90^{\circ}](https://tex.z-dn.net/?f=%5Ctheta%20%3D%2090%5E%7B%5Ccirc%7D)
![B = \frac{0.069}{0.2\times sin90} = 0.345\ T](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7B0.069%7D%7B0.2%5Ctimes%20sin90%7D%20%3D%200.345%5C%20T)
(b) When ![\theta = 60^{\circ}](https://tex.z-dn.net/?f=%5Ctheta%20%3D%2060%5E%7B%5Ccirc%7D)
![B = \frac{0.069}{0.2\times sin60} = 0.398\ T](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7B0.069%7D%7B0.2%5Ctimes%20sin60%7D%20%3D%200.398%5C%20T)
Answer:
D
Explanation:
The color you see is the color the object reflectes. The rest of the color are absorbed by that object.
Answer:
theory
Explanation:
that's why it's called the Big Bang Theory
E=kq/r^2
q=(E*r^2)/k
q=(.086N/C)(1.7m^2)/(8.99*10^9N*m^2/C^2)
q=2.76*10^-11 C
q=2.8*10^-11 C
<span>273 K is the freezing point of water and it is equal to 0 degrees Celcius ,In this change ,heat is released so as to gain the suitable temperature for freezing.273 K is just the Celsius scale but with being 0 but the same scale ,this number was arrived at because temperature comes from the motion of a substance's particles.</span>