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प्रश्न
Devices which is used to convert high alternating current to low alternating current is ______.
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उत्तर
Devices which is used to convert high alternating current to low alternating current is Step down transformer
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संबंधित प्रश्न
State the principle of the step-down transformer and its working.
Express the turn ratio in terms of voltages.
State two ways through which the strength of an electromagnet can be increased.
Explain the significance of Lenz’s law to show the conservation of energy in electromagnetic induction.
Why is the iron core of a transformer made laminated (thin sheets) instead of being in one solid piece?
Draw a labelled diagram to show the various parts of a step-up transformer and step down transformer.
1 MW power is to be delivered from a power station to a town 10 km away. One uses a pair of Cu wires of radius 0.5 cm for this purpose. Calculate the fraction of ohmic losses to power transmitted if
- power is transmitted at 220 V. Comment on the feasibility of doing this.
- a step-up transformer is used to boost the voltage to 11000 V, power transmitted, then a step-down transfomer is used to bring voltage to 220 V. (ρCu = 1.7 × 10–8 SI unit)
What is a transformer?
For what purpose are the transformers used?
A 12 V, 60 W lamp is connected to a 220 V AC supply using an ideal transformer. Find the primary current.
