Question

An $1800\, W$ toaster, a $1.3 \, KW$ electric fan and a $100W$ lamp are plugged in the same $120V$ circuit i.e. all the three devices are in parallel. What is the approximate value of the total current (i.e. sum of the current drawn by the three devices) through circuit ?

• A. $18\, A$
• B. $27\, A$
• C. $40\, A$
• D. $120\, A$

Answer 1

Answer: (B)

$27\, A$

Answer 2

Power consume
$P=P_{1}+P_{2}+P_{3}$ ...(i)
and $P=VI$
From E (i), we get
$P_{1}+P_{2}+P_{3}=VI$
$\Rightarrow (1800+1300+100) Watt =(120) I$
$\Rightarrow 3200 =120I$
$I=26.66\, A$
$\approx 27\, A$