A power transmission line feeds input... | AC

JEE MAIN 2019

09-01-19 S2

Question

A power transmission line feeds input power at 2300 V to a step down transformer with its primary windings having 4000 turns. The output power is delivered at 230 V by the transformer. If the current in the primary winding of the transformer is 5 A and its efficiency is $90 \%$, the output current would be:

Select the correct option:

25 A

50A

45A

35A

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$\begin{aligned} & P_{\text {irput }}=V_p-I_p=2300 \times 5 \mathrm{~W} \\ & P_{\text {output }}=0.9 P_{\text {iouput }}=V_s I_s \\ & \Rightarrow I_s=\frac{0.9 \times 2300 \times 5}{230}=45 \mathrm{~A}\end{aligned}$

Question Tags

JEE Main

Physics

Easy

Start Preparing for JEE with Competishun

Report Issue