Advertisements
Advertisements
प्रश्न
Find the ratio of primary and secondary currents in terms of turn ratio in an ideal transformer.
Advertisements
उत्तर
According to law of conservation of energy,
Input electrical power = Output electrical power
EpIp = EsIs
`:.E_s/E_p=I_p/I_s`
`I_p/I_s=E_s/E_p=N_s/N_p`
`=>I_p/I_s=n`
APPEARS IN
संबंधित प्रश्न
Write the function of a transformer.
Mention various energy losses in transformer device
Which coil of a step up transformer is made thicker and why?
Why is the core of a transformer laminated?
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?
State the principle of a step-up transformer. Explain, with the help of a labeled diagram, its working ?
An a.c generator generates an emf 'ε' where ε = 314 Sin (50πt) volt. Calculate the frequency of emf ε.
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
Define a Transformer.
A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?
