Advertisements
Advertisements
प्रश्न
In a transformer, the frequency of A.C. voltage ______.
विकल्प
increase
decreases
remains same
Advertisements
उत्तर
In a transformer, the frequency of A.C. voltage remain same.
APPEARS IN
संबंधित प्रश्न
Explain the construction and working of the transformer.
How much current is drawn by the primary of a transformer connected to 220 V supply when it delivers power to a 110 V − 550 W refrigerator?
The input and output voltage of a transformer are 220 V and 44 V respectively. Find: the turns ratio.
Why is the core of a transformer made of soft iron?
(i) Draw a clear labelled diagram of an electric bell.
(ii) Explain in brief, its working.
(iii) What material is used for the core of an electric bell? State the reason.
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?
An ideal transformer has 100 turns in the primary and 250 turns in the secondary. The peak value of the AC is 28 V. The rms secondary voltage is nearest to ______
The primary coil of a transformer has 800 turns and the secondary coil has 8 turns. It is connected to a 220 V ac supply. What will be the output voltage?
Magnetic flux passing through a coil is initially 4 × 10-4 Wb. It reduces to 10% of its original value in t second. If the emf induced is 0. 72 mV then t in second is ______.
