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jaimon8729
28.02.2020 •
Physics
An 1,840 W toaster, a 1,380 W electric frying pan, and a 70 W lamp are plugged into the same outlet in a 15 A, 120 V circuit. (The three devices are in parallel when plugged into the same socket.) (a) What current (in A) is drawn by each device?
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Ответ:
Answer with Explanation:
We are given that
Power of toaster=![P_1=1840 W](/tpl/images/0527/7345/0399c.png)
Power of electric frying pan=![P_2=1380 W](/tpl/images/0527/7345/dd78b.png)
Power of lamp=![P_3=70 W](/tpl/images/0527/7345/1aa34.png)
Current in circuit=15 A
Potential difference= V=120 V
We know that
Current=![\frac{P}{V}](/tpl/images/0527/7345/d9cf9.png)
Using the formula
Current drawn by toaster=![I_1=\frac{1840}{120}=15.3 A](/tpl/images/0527/7345/d3600.png)
Current drawn by electric frying pan=![I_2=\frac{1380}{120}=11.5 A](/tpl/images/0527/7345/97059.png)
Current drawn by lamp=![I_3=\frac{70}{120}=0.58 A](/tpl/images/0527/7345/ca7a2.png)
Ответ: