Physics · Magnetism and Electromagnetic Induction
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The function of a main transformer is to convert:
- A
one direct voltage to another direct voltage of different magnitude.
- B
one alternating voltage to another alternating voltage of different magnitude.
- C
a high value alternating voltage to low value direct voltage.
- D
A high value alternating current to low value direct voltage
A transformer converts a high voltage low current alternating current to a low voltage high current one and vice versa. Therefore the answer will be B.
This type of voltage conversion is not possible using a transformer because transformers work only with alternating voltages, not direct voltages.
This is the primary function of a transformer. The transformer can increase or decrease the magnitude of the alternating voltage without changing the frequency. The ratio of the number of turns in the primary coil to the number of turns in the secondary coil determines the voltage ratio.
This type of voltage conversion is not possible using a transformer because transformers work only with alternating voltages, not direct voltages.
This is not a typical function of a transformer because transformers work with voltages, not currents.
Tagged under Physics · Magnetism and Electromagnetic Induction · 2013