First slide

Electrical machines and devices

Question

A power transformer is used to step up an alternating e.m.f. of 220 V to 11 kV to transmit 4.4 kW of power. If the primary coil has 1000 turns, what is the current rating of the secondary ? Assume 100% efficiency for the transformer

Moderate

A

4 A
B

0.4 A
C

0.04 A
D

0.2 A

Solution

$i_{s} = \frac{P_{s}}{V_{s}} = \frac{4 .4 \times 10^{3}}{11 \times 10^{3}} = 0 .4 A$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App