Question

люди хелп ми............... ​

Answer 1

Ответ:

4  А)

$\frac{1}{R}=\frac{1}{R1}+\frac{1}{R2} =\frac{1}{2} +\frac{1}{6} =\frac{4}{6}\\R=1*6/4=1.5$

В) 1.5+10=11.5

С) U1=U2=RI=2*3=6В

5

$A=I^{2}Rt\\R=\frac{A}{I^{2}t} =\frac{300}{0,25*120} = 10$