What is a transformer?
Q: What is a transformer?
A: A transformer is a device that transfers electrical energy from one electrical circuit to another through mutual (electromagnetic induction) and without change in frequency.
Q: What is the main reason to use a transformer?
A: The main reason to use a transformer is to make power of one voltage level into power of another voltage level.
Q: How do transformers transfer energy?
A: Transformers transfer energy from the primary coil or input coil, which is connected to supply side, to the secondary coil which supplies power to load, by electromagnetism.
Q: Where are transformers used in power grids?
A: In power grids many transformers are used for delivering electricity from the generator and to the user.
Q: How does a transformer adjust voltage levels for homes and businesses?
A: The transformers in neighborhoods, on electricity poles, or those connected to underground wires usually transform high voltage of 7,200 volts into 220-240 volts of electricity for powering lights and appliances such as refrigerators in homes and businesses. Some countries may use different voltages such as 120 volts.
Q: Can transformers increase power?
A: No, transformers cannot increase power; if the voltage is raised then the current will be proportionally lowered while if the voltage is lowered then the current will be proportionally increased.
Q: What are some basic types of transformers?
A: There are several basic types of transformers including coupling transformer inside stage microphones, big units that carry hundreds of MVA used in power grids, and those found inside electronics equipment providing different kinds of electricity needed by various parts.
