Physics-
General
Easy
Question
Core of transformer is made up of
- Soft iron
- Steel
- Iron
- Alnico
The correct answer is: Soft iron
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Two identical induction coils each of inductance L joined in series are placed very close to each other such that the winding direction of one is exactly opposite to that of the other, what is the net inductance?
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A 100% efficient transformer has 100 turns in the primary and 25 turns in its secondary coil. If the current in the secondary coil is 4 amp, then the current in the primary coil is
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In which part of our body food gets absorbed?
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A transformer has an efficiency of 80%. It is connected to a power input of 5kW at 200 V. If the secondary voltage is 250 V, the primary and secondary currents are respectively
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In a transformer, the number of turns in primary coil and secondary coil are 5 and 4 respectively. If 
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An inductor 
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An e.m.f. of 
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Name the hardest material present in the body?
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