К источник ЭДС, равной 10 В, и внутренним сопротивлением 0,25 Ом подключена нагрузка. Сила тока в цепи 8 А. Определите КПД данной схемы - №18528381

К источник ЭДС, равной 10 В, и внутренним сопротивлением 0,25 Ом подключена нагрузка. Сила тока в цепи 8 А. Определите КПД данной схемы
- Предмет:
  Физика
- Автор:
  sharon97
- 5 лет назад

Ответы 1

E=U+I*r---->U=E-I*r=10-8*0.25=8 Bη=U/E=8/10=0.8=80%
- Автор:
  abbie
- 5 лет назад
- 0
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Mike was the youngest Rabbit in the Rabbit's family.
He has six brothers and seven sisters.
There were seven beds in their bedroom.
The beds were double-deckers.
Mike loved his bedroom.
But one morning Mother Rabbit said to Father Rabbit, "We must find a house with more bedroom!"
All Mike's brothers and all Mike's sisters said, "I want to have my own bedroom."
And Mike said, "I want to have my own bedroom too."
The Rabbit family went to look for a house with more bed rooms.
They saw many beautiful flats and houses.
But they couldn't find a house with fifteen bedrooms.
And theb Father Rabbit built a house with fifteen bedrooms in the country.
They put the children in a big car.
They put cupboards, wardrobes, chairs, carpets and sofas in the big car.
And they went to the country.
When it was time to go to bed, Mike got into bed in his own bedroom.
But soon he got out of bed andd went doenstairs.
"What are you going to do, Mike?"
Mother Rabbit said.
"I'm going to clean my teeth," said Mike.
He cleaned his teeth and went upstairs.
Soon he got out of bed a second time.
"Mike, what are you going to do?"
Mother Rabbit said.
"I'm going to drink some water," said Mike.
He drank some water and went upstairs.
Soon he went out of bed a third time.
"Mike, what are you going to do NOW?"
Mother Rabbit said.
"Nothing," said Mike.
"But I don't want to stay alone in my big bedroom!"
Mother Rabbit said, "All your brothers and sisters think you'll got to their bedrooms.
But you will not!
Because you are not a baby."
And Mike slept all night in his own bedroom.
And he was very glad because now his brothrs and sisters knew that he wasn't a baby!
Are these sentences true ( T ) or false ( F ) according to the story ?
Mike had six little dogs and seven fluffy cats.
Mike was the youngest in the family.
The Rabbit family looked for a new flat or a house with more bedrooms.
Father Rabbit bought a new house with fourteen bedrooms.
They put cupboards, wardrobes, chairs, carpets and sofas in a big bus.
Mike cleaned his teeth, drank some water and ate some carrots.
Mike loved his mother.
Mike didn’t want to stay alone in his big bedroom.
He went to sleep with his mother.
Now his family knew that Mike wasn’t a baby.
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