Предмет: Физика, автор: agniandra

За какое время электрическая лампа потребит энергию 96 Дж, если сила тока в лампе 0,4 А, а напряжение в сети 4 В?

1) за 1 мин

2) за 6 мин

3) за 153,6 с

4) за 600 с


makskorespcqrt5: С ответом я не разобрался, мне кажется, либо я не прав, либо в вариантах ответа есть ошибка.

Ответы

Автор ответа: makskorespcqrt5
3

Ответ:

Формула джоуля такова: Q = I² * R * t

из нее исходит, что

t = Q /  ( I² * R)

где Q это джоули

I это сила тока

R это сопротивление

t это время.

Но если решить по такой формуле получится 150.

Пересмотрите, пожалуйста, варианты ответа. Либо я в чем то ошибся

Объяснение:

Похожие вопросы
Предмет: Английский язык, автор: uporova2013
Кто-нибудь, помогите пожалуйста...
ТЕСТ ДЛЯ 11 А КЛАССА
1. Everything is going well. We _____ any problems so far. a) didn’t have b) have c) haven’t had
2. ______ a car when they were living in Paris? a) Have they b) Did they have c) Have they had
He wondered where_____ my holiday. a) had I spent b) I had spend c) I spend
4. They have made _____ progress on the contract. a) little b) few c) many
She’ll go and see Jack if she ____ enough time tomorrow. has b) will have c) have
Shakespeare is ______ to understand than Agatha Christie. more difficult b)much difficult c) more easier
He never has breakfast at home, _____ he? a) does b) doesn’t c) has
8. She didn’t remember where _____ her umbrella. a) had she left b) she left c) she had left
9. I have never heard him_____. a) sang b) singing c) to sing
10. Cars ____ not only in Japan. a) are manufactured b) manufactured c) have manufactured
11. The meeting will start when everybody_____. a) has arrived b) will arrive c) arrived
12. «You must hurry»,he________. a) said me b)said to me c)told to me
13. He decided to save some money and put _________in the bank. a)them b)their c)it
14.__________Mississippi is one of the longest rivers in the world. a)The b)A c)-
15. I don’t like parties ___ finish late. a)who b)what c)which
16.Ann’s parents let her_________to the mountains. a)to go b)go c)going
17. He said that he had seen her____ a)yesterday b)the day before c)the next day
18.Did you have a good night?-No, I slept_________ a) very bad b)very badly c)very worse
19. The forecast promises such ___good weather, but I don’t believe it. a)- b)a c)the
20.She ________in the sun and got burnt. a)has lain b) has been lying c)lay
21._______the rain! It’s beating so hard against the window. a)hear b)listen c)listen to
22. While I ________in the garden my wife was cooking dinner. a)had worked b) was working c)have been working
23.I don’t want to know ____they are talking about a) that b)what c)whose
24.I _____any foreign languages at school. a) didn’t learn b)have learnt c)hadn’t learnt
25. He can’t help coughing. a) No he can’t b)Yes, he can’t c) No, he doesn’t