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What is the function of breather in a transformer?
What is the function of a breather in a transformer?
A 100 VA, 120/12 V transformer is to be connected so as to form a step-up transformer. A Primary voltage of 120 V is applied to the transformer. What is the secondary voltage of the transformer?
The chemical used in breather for transformer should have the quality of
What is the material used inside the breather to prevent moisture entering the transformer?
Which of the following is the most important quality required for chemical in breather, so that it can be used perfectly in an electrical transformer?
Match the following: (i) Half wave rectifier p) Transformer not required (ii) Full wave rectifier  q) Centre tap transformer required (iii) Full wave bridge rectifier r) Ordinary transformer required
Consider the following given statements about auto-transformers and choose the one which is/are correct. 1. Auto-transformers require less copper as compared to a conventional,2 winding transformer of the same capacity. 2. Auto-transformers provide isolation between the primary and secondary windings. 3. Auto- transformer has less leakage reactance as compared to the conventional, 2 winding transformer of the same capacity.
If the equivalent resistance and reactance of the transformer referred to the secondary of a single-phase transformer is 0.6 Ω and 0.8 Ω, respectively, the voltage drop in the transformer when supplying a current of 10 A at 0.8 pf lag is:
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Transformers can also be used for isolation, where the voltage in equals the voltage out, with separate coils not electrically bonded to one another. B: Transformers are most commonly used for increasing low AC voltages at high current (a step-up transformer) or decreasing high AC voltages at low current (a step-down transformer) in electric power applications. C: It was discovered in 1831. D: A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to another.