Question

I 1А t 3 c A 30 Дж I2 2 A t2 2с

Answer 1

I1=1 A     A1=30 Дж    t1=3 c    I2=2 A    t2=2 c    A2=?

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A1=I1²*R*t1 -----> R=A1/(I1²*t1)

A2=I2²*R*t2=(I2/I1)²*A1*t2/t1=(2/1)²*30*2/3=80 Дж

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Answer 2

It seems like the text you provided contains a mix of characters, numbers, and symbols. It's not clear what you are trying to convey. Could you please provide more context or clarify your statement? This way, I can better understand your question and try to assist you properly.