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1.
Fan is based on
2.
The number of turns of primary and secondary coils of a transformer are 5 and 10 respectively and the mutual inductance of the transformer is 
. Now the number of turns in the primary and secondary of the transformer are made 10 and 5 respectively. The mutual inductance of the transformer in 
will be
. Now the number of turns in the primary and secondary of the transformer are made 10 and 5 respectively. The mutual inductance of the transformer in will be
3.
The primary winding of a transformer has 100 turns and its secondary winding has 200 turns. The primary is connected to an ac supply of 
and the current flowing in it is 
. The voltage and the current in the secondary are
and the current flowing in it is . The voltage and the current in the secondary are