Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
`E_S/E_P = N_S/N_P`
Here e.m.f. is directly propotional to number of turns.
APPEARS IN
संबंधित प्रश्न
Derive an expression for ratio of e.m.f.s and currents in terms of number of turns in primary and secondary coil.
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. 10.44 shows a coil X connected to a sensitive centre –zero galvanometer G and a coil P connected to a battery through a switch S.
(a) Describe the observation when the switch S is (i) closed suddenly, (ii) then kept closed, (iii) finally opened.
(b) Name and state the law which explains the above observations.
Name the principle on which functioning of a transformer depends.
The primary and secondary coils of a transformer each have an inductance of 200 x 10-6 H. The mutual inductance between the windings is 4 x 10-6 H. What percentage of the flux from one coil reaches the other?
State the mathematical relation between a number of turns in the primary coil to a secondary coil in the step-up transformer.
A 200V/120V step-down transformer of 90% efficiency is connected to an induction stove of resistance 40 Ω. Find the current drawn by the primary of the transformer.
Define a Transformer.
Derive the equation for a transformer.
