To find the amount of electricity (charge) that has passed through the used soldering iron, we apply the formula: q = I * t.
Values of variables: I – current in the soldering iron (I = 50 mA = 0.05 A); t – duration of work (t = 4 min = 240 s).
Calculation: q = I * t = 0.05 * 240 = 12 Cl.
Answer: In 4 minutes, electricity in the amount of 12 Cl will pass through the used soldering iron.
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