Compared to permanent magnets why are electromagnets more useful in
many modern technologies?
...
![subject](/tpl/images/cats/fizika.png)
Physics, 19.03.2021 05:50 Bra1nPowers
Compared to permanent magnets why are electromagnets more useful in
many modern technologies?
A. Strong permanent magnets are too large to use.
B. By controlling the current electromagnets can be turned on and
off.
C. To use an electromagnet, a power supply is not necessary.
D. In permanent magnets, the strength of the magnetic field is more
consistent
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 09:30
1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 13:20
Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 15:00
Lightning is an example of what phenomenon? a release of a large amount of energy an absorption of a large amount of energy a natural electric circuit a natural electric current
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 21:50
To fully describe the photoelectric effect, scientists must consider which of the following to be quantized? o a. both light and matter o b. matter only o c. light only o d. neither light nor matter
Answers: 2
You know the right answer?
Questions
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/istoriya.png)
History, 25.06.2019 16:50
![question](/tpl/images/cats/istoriya.png)
History, 25.06.2019 16:50
![question](/tpl/images/cats/istoriya.png)
History, 25.06.2019 16:50
![question](/tpl/images/cats/mat.png)
Mathematics, 25.06.2019 16:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 25.06.2019 16:50
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 25.06.2019 16:50
![question](/tpl/images/cats/mat.png)
Mathematics, 25.06.2019 16:50
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/fizika.png)
Physics, 25.06.2019 16:50
![question](/tpl/images/cats/himiya.png)
Chemistry, 25.06.2019 16:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 25.06.2019 16:50
![question](/tpl/images/cats/istoriya.png)
History, 25.06.2019 16:50