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JE 2019 || Day 18 || Transformers Quiz 3
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Question 1
A ideal transformer has 66 turns in the secondary. The number of primary turns is………………..
Question 2
A low-voltage outdoor lighting system uses a transformer that steps down to for safety. The equivalent resistance of all low-voltage lamps is What is the current in the secondary coil? Assume the transformer is ideal and there are no losses in the line.
Question 3
What is the efficiency of transformer compared with that of electrical motors of the same power?
Question 4
The inductive reactance of a transformer depends on
Question 5
Fig. shows the equivalent circuit of a practical transformer on no-load. The element accounts for…………………
Question 6
A single phase transformer has 400 primary and 1000 secondary turns. The net cross-sectional area of the core is If the primary is connected to source, what is the voltage induced in the secondary?
Question 7
A low-voltage outdoor lighting system uses a transformer that steps down to for safety. The equivalent resistance of all low-voltage lamps is Assume the transformer is ideal and there are no losses in the line. What is the current in the primary coil?
Question 8
An ideal transformer is one which…………..
Question 9
If the frequency of input voltage of a transformer is increased keeping the magnitude of the voltage unchanged, then
Question 10
The principle of operation of a 3-phase induction motor is most similar to that of a ___________.
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ESE & GATE EEGeneralApr 18ESE & GATE EE