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प्रश्न
What type of transformer is used in a mobile phone charger?
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उत्तर
A step-down transformer is used in mobile phone chargers.
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संबंधित प्रश्न
Explain the construction and working of the transformer.
Derive an expression for e.m.f. and current in terms of turns ratio
How is the e.m.f. across primary and secondary coils of a transformer related with the number of turns of the coil in them?
On which type of current do transformers work?
Why is the core of a transformer laminated?
State two factors on which the magnitude of induced e.m.f. depend.
Describe the construction and working of a transformer with a neat labelled diagram.
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 operating at primary voltage 8 kV and secondary voltage 160 V serves a load of 80 kW. Assuming the transformer to be ideal with purely resistive load and working on unity power factor, the loads in the primary and secondary circuit would be:
