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प्रश्न
A power transmission line feeds input power at 2300 V to a stepdown transformer with its primary windings having 4000 turns. What should be the number of turns in the secondary in order to get output power at 230 V?
उत्तर
Input voltage, V1 = 2300
Number of turns in the primary coil, n1 = 4000
Output voltage, V2 = 230 V
Number of turns in secondary coil = n2
Voltage is related to the number of turns as:
`"V"_1/"V"_2 = "n"_1/"n"_2`
`2300/230 = 4000/"n"_2`
n2 = `(4000 xx 230)/2300` = 400
Hence, there are 400 turns in the second winding.
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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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Draw a labeled diagram of a full wave rectifier circuit. State its working principle. Show the input-output waveforms ?
Describe briefly, with the help of labelled diagram, working of a step-up transformer.
A step-up transformer converts a low voltage into high voltage. Does it not violate the principle of conservation of energy? Explain.
Can a transformer be used with direct current source? Give reason.
Name three losses of energy in a transformer. How are they minimized?
A circular coil of 100 turns with a cross-sectional area of 1 m2 is kept with its plane perpendicular to the magnetic field of 1 T. The magnetic flux linkage is ______.
Explain the construction of transformer.
Give the advantage of AC in long distance power transmission with an illustration.
Which among the following, is not a cause for power loss in a transformer?
