Question:
The primary of a transformer has 400 turns while the secondary has 2000 turns. If the power output from the secondary at 1000 V is 12 kW, what is the primary voltage?
The primary of a transformer has 400 turns while the secondary has 2000 turns. If the power output from the secondary at 1000 V is 12 kW, what is the primary voltage?
Updated On: Jun 7, 2022
- 200 V
- 300 V
- 400 V
- 500 V
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The Correct Option is A
Solution and Explanation
$N_{P}=400,\,N_{S} = 2000$ and $V_{S} = 1000\,V.$
$\frac{V_{P}}{V_{S}}=\frac{N_{P}}{N_{S}}$
or,$\quad V_{P} = \frac{V_{S}\times N_{P}}{N_{S}}=\frac{1000\times400}{2000}=200\,V.$
$\frac{V_{P}}{V_{S}}=\frac{N_{P}}{N_{S}}$
or,$\quad V_{P} = \frac{V_{S}\times N_{P}}{N_{S}}=\frac{1000\times400}{2000}=200\,V.$
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When voltage changes its direction after every half cycle is known as alternating voltage. The current flows in the circuit at that time are known as alternating current. The alternating current(AC) follows the sine function which changes its polarity concerning time. Most of the electrical devices are operating on the ac voltage.
