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Q. No.A step–down transformer transforms a supply line voltage of \(2200\) volt into \(220\) volt. The primary coil has \(5000\) turns. The efficiency and power transmitted by the transformer are \(90\%\) and \(8\) kilowatts respectively. How many turns are there in the secondary one?
| 1. | \(5000\) | 2. | \(50\) |
| 3. | \(500\) | 4. | \(5\) |
Subtopic: Transformer |
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In the transformer shown in the figure, the ratio of the number of turns of the primary to the secondary is \(\frac{N_1}{N_2}= \frac{1}{50}\). If a voltage source of \(10\) V is connected across the primary, then the induced current through the load of \(10~\text{k}\Omega\) in the secondary is:
1. \(\frac{1}{20}~\text{A}\)
2. zero
3. \(\frac{1}{10}~\text{A}\)
4. \(\frac{1}{5}~\text{A}\)
1. \(\frac{1}{20}~\text{A}\)
2. zero
3. \(\frac{1}{10}~\text{A}\)
4. \(\frac{1}{5}~\text{A}\)
Subtopic: Transformer |
73%
From NCERT
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