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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
Draw a labeled diagram of a step-down transformer.
A transformer converts 240 V AC to 60 V AC. The secondary has 75 turns. The number of turns in primary are _______.
(A) 600
(B) 500
(C) 400
(D) 300
The following diagram in Fig.10.42 shows a coil of several turns of copper wire connected to a sensitive centre zero galvanometer G near a magnet NS. The coil is free to move in the direction shown in the diagram.
(i) Describe the observation if the coil is rapidly moved.
(ii) How would the observation be altered if (a) the coil has twice as many turns (b the coil was made to move three times as fast?
A step-down transformer reduces the supply voltage from 220 V to 11 V and increase the current from 6 A to 100 A. Then its efficiency is
Give the advantage of AC in long distance power transmission with an illustration.
Draw the effective equivalent circuit of the circuit shown in figure, at very high frequencies and find the effective impedance.
In an ideal transformer, the turns ratio is `N_p/N_s = 1/2`. The ratio Vs : Vp is equal to (the symbols carry their usual meaning):
On the basis of winding, what are the two types of transformers?
Which description of the primary coil is correct?
Assuming no flux leakage, which coils does the changing flux thread through?
