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प्रश्न
Express the turn ratio in terms of voltages.
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उत्तर
Turn Ratio, `n=N_s/N_p=E_s/E_p`
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संबंधित प्रश्न
State the factors on which the frequency of the alternating e.m.f. depends.
The power supply to the primary coil of a transformer is 200 W. Find
(i) Current in primary coil if the e.m.f. supply to it is equal to 220V.
(ii) The number of turns in the primary coil is equal to 80 and that in secondary is 800. What is the transformation ratio?
(iii) Name the type of transformer.
(iv) What will be the output voltage?
(v) What is the current in the secondary coil for an ideal transformer?
(vi) What is the output power?
(vii) Is output and input power equal?
(viii) Compare the current flowing in a secondary coil and in a primary coil.
Applying e.m. f to primary coil is 210 V. If the number of turns in primary coil is 200 turns and that of in secondary coil is 20 turns, then find out the output voltage. Name the type of transformer.
A transformer lowers e.m.f. from 220 V to 15 V. If the number of turns in primary are 3520, how many turns are in the secondary coil?
State whether true or false. If false, correct the statement.
A transformer can step up direct current.
Give the advantage of AC in long distance power transmission with an illustration.
What type of transformer is used in a mobile phone charger?
How do the input and output powers in a transformer compare? State the assumption made.
