JEE MAIN - Physics (2021 - 16th March Evening Shift - No. 16)
For the given circuit, comment on the type of transformer used.
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Auxiliary transformer
Step down transformer
Step-up transformer
Auto transformer
Explanation
Voltage across secondary coil,
= $${{Power\,across\,load} \over {Current\,pas\sin g\,through\,load}}$$
$$ \Rightarrow {V_2} = {P \over {{I_L}}} = {{60} \over {0.11}} \Rightarrow {V_2} = 545.45$$ V
Voltage across primary coil, V1 = 220V
$$\Rightarrow$$ V2 > V1
It means that step-up transformer is used.
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