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Home » A 60 W load is connected to the secondary of a transformer whose primary draws line voltage. If a current of 0.54 A flows in the load, what is the current in the primary coil? Comment on the type of transformer being used.
A 60 W load is connected to the secondary of a transformer whose primary draws line voltage. If a current of 0.54 A flows in the load, what is the current in the primary coil? Comment on the type of transformer being used.
Alternating Current | CBSE | Class 12 | NCERT Exemplar | Physics
A 60 W load is connected to the secondary of a transformer whose primary draws line voltage. If a current of 0.54 A flows in the load, what is the current in the primary coil? Comment on the type of transformer being used.

P_{s} is given as 60W

I_{s} is given as 0.54A

Primary voltage is given as 220V

V_{s}=60/0.54=110V

The transformer is a step-down transformer because the secondary voltage is lower than the primary voltage.

The transformation ratio is,

r=V_{s}/V_{p}=I_{p}/I_{s}

On putting the values we get,

I_{p}=0.27A

i

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