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प्रश्न
The primary coil of a transformer has 60 turns whereas its secondary coil has 3000 turns.
If a 220 V ac voltage is applied to the primary coil, how much emf is induced in the secondary coil?
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उत्तर
The voltage of primary coils is
VP = 220 V
Let the voltage of secondary coil be VS.
Now `"N"_"s"/"N"_"P" = "V"_"S"/"V"_"P"`
⇒ `3000/60 = "V"_"S"/220`
⇒ VS = 50 × 220
= 11,000 volt
VS = 11,000 V
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संबंधित प्रश्न
The primary coil of an ideal step-up transformer has 100 turns and the transformation ratio is also 100. The input voltage and power are 220 V and 1100 W, respectively. Calculate the
(a) number of turns in secondary
(b) current in the primary
(c) a voltage across secondary
(d) current in secondary
(e) power in secondary
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1) Name the device used to change the alternating voltage to a higher or lower value. State one cause for power dissipation in this device.
2) Explain with an example, how power loss is reduced if the energy is transmitted over long distances as an alternating current rather than a direct current.
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