Advertisements
Advertisements
प्रश्न
The input and output voltage of a transformer are 220 V and 44 V respectively. Find: the turns ratio.
Advertisements
उत्तर
We know that
`"E"_"p"/"E"_"s" = "N"_"p" / "N"_"s"`
So turns ratio
`"N"_"s" / "N"_"p" = 44/ 220`
= 1.5
APPEARS IN
संबंधित प्रश्न
Express the turn ratio in terms of voltages.
In a transformer, the frequency of A.C. voltage ______.
An a.c generator generates an emf 'ε' where ε = 314 Sin (50πt) volt. Calculate the frequency of emf ε.
An ideal transformer has 100 turns in the primary and 250 turns in the secondary. The peak value of the AC is 28 V. The rms secondary voltage is nearest to ______
A 220 V input is supplied to a transformer. The output circuit draws a current of 2.0 A at 440 V. If the ratio of output to input power is 0.8, then the current drawn by primary winding is ______.
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?
A transformer is essentially an a.c. device. It cannot work on d.c. It changes alternating voltages or currents. It does not affect the frequency of a.c. It is based on the phenomenon of mutual induction. A transformer essentially consists of two coils of insulated copper wire having different numbers of turns and wound on the same soft iron core.
The number of turns in the primary and secondary coils of an ideal transformer is 2000 and 50 respectively. The primary coil is connected to a main supply of 120 V and secondary coil is connected to a bulb of resistance 0.6 Ω.
The value of current in the bulb is ______.
A transformer is used ______
Efficiency of transformer is the ratio of ______.
For what purpose are the transformers used?
