Answer: 5.91kw
Explanation:
given data:
power = 65kw
voltage stepped up = 120v t0 1200
R 0.100
<u>Solution:</u>
when the it is stepped to 120v
![P = VI \\65000/ 120I\\ I = 541.7A\\](https://tex.z-dn.net/?f=P%20%3D%20VI%20%5C%5C65000%2F%20120I%5C%5C%20I%20%3D%20541.7A%5C%5C)
power loss
![(I^{2} )R*2\\= (541.7^{2})0.100*2\\= 58536.2w](https://tex.z-dn.net/?f=%28I%5E%7B2%7D%20%29R%2A2%5C%5C%3D%20%28541.7%5E%7B2%7D%290.100%2A2%5C%5C%3D%2058536.2w)
when it is stepped to 1200v
![\frac{65000}{1200} \\ I = 54.17A\](https://tex.z-dn.net/?f=%5Cfrac%7B65000%7D%7B1200%7D%20%5C%5C%20I%20%3D%2054.17A%5C)
![(I^{2} )R*2\\= (54.17^{2})0.100*2\\= 586.9w](https://tex.z-dn.net/?f=%28I%5E%7B2%7D%20%29R%2A2%5C%5C%3D%20%2854.17%5E%7B2%7D%290.100%2A2%5C%5C%3D%20586.9w)
total power saved
![= 65kw - 58.5kw - 0.59kw\\= 5.91kw](https://tex.z-dn.net/?f=%3D%2065kw%20-%2058.5kw%20-%200.59kw%5C%5C%3D%205.91kw)
Answer:
hi how are u fine thanks you
Answer:
-18
Explanation:
acellus use the formula of magnification and watch your minus sign
Answer:
B) alternating current
Explanation:
Alternating currents are different from direct current. These form of currents are used to transport power from generating stations over large distances.
- Alternating current is a current that reverses direction periodically.
- The voltage also reverses and leads to little loss in voltage.
- This current reversal makes them desirable for long distance transmission coupled with the little loss in voltage.
- Transformers used to change the voltage of these wave forms.
- The lesser loss in voltage makes AC desirable for long distance transmission.