Alternating Current Question 4
Question 4 - 2024 (27 Jan Shift 2)
Primary side of a transformer is connected to $230 V, 50 Hz$ supply. Turns ratio of primary to secondary winding is $10: 1$. Load resistance connected to secondary side is $46 \Omega$. The power consumed in it is :
(1) $12.5 W$
(2) $10.0 W$
(3) $11.5 W$
(4) $12.0 W$
Show Answer
Answer: (3)
Solution:
$\frac{V _1}{V _2}=\frac{N _1}{N _2}$
$\frac{230}{V _2}=\frac{10}{1}$
$V _2=23 V$
Power consumed $=\frac{V _2^{2}}{R}$
$=\frac{23 \times 23}{46}=11.5 W$
