It is the specific heat of water and its value is
Answer:
<em>The primary coil has 13,400 turns</em>
Explanation:
<u>Voltage Transformers</u>
A transformer is an electrical apparatus that converts an alternating electrical voltage to another. Step-down transformers lower the voltage from higher levels (kilovolts) to consumer levels (120/240 Volts).
The ratio between both voltages can be computed as
![\displaystyle r=\frac{V_1}{V_2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20r%3D%5Cfrac%7BV_1%7D%7BV_2%7D)
Where V1 is the primary voltage and V2 is the secondary voltage. This ratio depends on the turns ratio of the coils wounded in a common magnetic core.
![\displaystyle r=\frac{N_1}{N_2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20r%3D%5Cfrac%7BN_1%7D%7BN_2%7D)
Being N1 the number of turns of the coils of the primary side and N2 the number of turns in the secondary coil. Both relations give us
![\displaystyle \frac{N_1}{N_2}=\frac{V_1}{V_2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7BN_1%7D%7BN_2%7D%3D%5Cfrac%7BV_1%7D%7BV_2%7D)
Solving for N1
![\displaystyle N_1=\frac{V_1}{V_2}\cdot N_2](https://tex.z-dn.net/?f=%5Cdisplaystyle%20N_1%3D%5Cfrac%7BV_1%7D%7BV_2%7D%5Ccdot%20N_2)
We have:
![V_1=12,000\ V\\V_2=120\ V\\N_2=134](https://tex.z-dn.net/?f=V_1%3D12%2C000%5C%20V%5C%5CV_2%3D120%5C%20V%5C%5CN_2%3D134)
Calculate N1
![\displaystyle N_1=\frac{12,000}{120}\cdot 134=13,400](https://tex.z-dn.net/?f=%5Cdisplaystyle%20N_1%3D%5Cfrac%7B12%2C000%7D%7B120%7D%5Ccdot%20134%3D13%2C400)
The primary coil has 13,400 turns
I’m sorry I wish I knew the answer but I don’t I need this for points I’m so sorry
Answer:
v1 = v2
Explanation:
Given:
- The missing figure is (attached).
- The Magnetic Field B1 > B2
Find:
How does the speed v1 of the electron in region 1 compare with the speed v2 in region 2?
Solution:
- From Lorentz Law we know that the Force that acts on the charge particle is the cross product of Magnetic Field Vector ( B1 or B2 ) and the velocity vector (v1 or v1).
- From the attached figure related to this problem we see that the electron velocity or direction of motion is always parallel to the magnetic field B1&B2.
- The law of cross product for parallel vector is 0. Hence, the Lorentz force acting on the electron is also zero.
- Zero Force means no work is done on the particle by the magnetic field, thus, the change in kinetic energy also zero for conservation of energy to hold.
- The initial and final kinetic energies of the electron is same. Hence, we can conclude that v1 = v2.