Transformer
Transformer: Overview
This topic covers concepts, such as, Transformers, Step Up Transformer, Loss of Energy in Transformer Due to Humming Effect & Loss of Energy in Transformer Due to Eddy Currents etc.
Important Questions on Transformer
The humming noise in transformer also depends upon the _____________ of the AC supply.
The humming can reduce the mechanical strength of the transformer core.
The main cause of transformer noise is _____.
What is humming loss in transformer?What is the reason of humming sound in transformer?
A step-down transformer has turns on secondary and turns on primary winding. If a transformer is connected to A.C. source, what is output current of the transformer?
A efficient transformer has turns in the primary and turns in its secondary coil. If the current in the secondary coil is , then the current in the primary coil is,
A step-down transformer is connected to line and of current is found to flow in output load. The ratio of the turns in primary and secondary coil is . If transformer efficiency is then the current flowing in primary coil will be,
A generator supplies to a transformer's primary coil, which has turns. If the secondary coil has turns, what is the secondary voltage?
A load is connected to the secondary of a transformer whose primary draws line voltage. If a current of flows in the load, what is the current in the primary coil? Comment on the type of transformer being used.
A transformer with turns ratio has , input. The frequency of the output is:
A transformer is used to light a and lamp from a mains. If the current is , the efficiency of the transformer is
A transformer with turns ratio has , input. The frequency of the output is:
The quantity that remains unchanged in a transformer is:
A power transmission line feeds input power at to a step-down transformer with its primary windings having turns giving the output power at . If the current in the primary coil of the transformer is and its efficiency is , the output current would be:
A generator supplies to a transformer's primary coil, which has turns. If the secondary coil has turns, what is the secondary voltage?
A load is connected to the secondary of a transformer whose primary draws line voltage. If a current of flows in the load, what is the current in the primary coil? Comment on the type of transformer being used.
Which of the following is minimised by laminating the core of an electrical transformer?
Iron loss an electrical transformer occurs in
What caused the humming effect in an electrical transformer? How it can be minimised.
