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ertyuk
@ertyuk
July 2022
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Помогите ооооооооочень срочно
Чему равна температура нити лампы, если до включения (20 °С) ее сопротивление было 55 Ом, а после включения стало 600 Ом (α=0,0048)
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solvo
t1=20 °С, R1= 55 Ом, R2= 600 Ом, α=0,0048. t2-?
R2=R1(1+α(t-t1));
1+α(t-t1)=R2/R1;
α(t-t1)=R2/R1-1;
α(t-t1)=(R2-R1)/R1; t-t1=
(R2-R1)/(αR1). t=
(R2-R1)/(αR1)+t1; t=545/(0,0048*55)+20=2084 °.
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Answers & Comments
R2=R1(1+α(t-t1)); 1+α(t-t1)=R2/R1; α(t-t1)=R2/R1-1; α(t-t1)=(R2-R1)/R1; t-t1= (R2-R1)/(αR1). t=(R2-R1)/(αR1)+t1; t=545/(0,0048*55)+20=2084 °.