Email
Chat with tutors
logo

Ask Questions, Get Answers

X
 
Questions  >>  CBSE XII  >>  Physics  >>  Alternating current
Answer
Comment
Share
Q)

The calculate the current drawn by the prime of a transformer which steps down $200\;v$ to $20\;v$ to operate a device of resistance $20 \Omega$ the efficiency of the transformer to be $80\%$

$\begin{array}{1 1} 0.125\;A \\ 1.25\;A \\ 12.50\;A \\ 125\;'A \end{array} $

1 Answer

Home Ask Tuition Questions
Your payment for is successful.
Continue
...