Hi!
I have this question in my homework:
A heater has power of 2.5 KW, it has been on for 12 hours.
a) How much will cost... (that is easy)
b) Explain why the electrical bill for such a device is smaller then what was calculated before (in A).
Our teacher said this in class: the consumer unit counts the incoming power and subtracts the outgoing power.
I may have misheard exactly what he said, but I think he said it like this. This really confused me! If the consumer unit really subtracts unused electricity then shouldn't it be too easy to make a "electric bill hack" - uses something like a generator?
I have heard about "hacking" the consumer unit by using magnets to stop the rotor, but I have also heard about some other devices, that plug in to the socket. One was something like a impulse generator, that does damage to the consumer unit, but the other one seems to cost few 1000$ and seems to somehow lower your bills. I don't really know nothing more about them and that is maybe why I don't know this answer.
Btw, output power is the power that will be turned in to practical energy (microwave oven, electricity to microwaves). It's just said here that microwave has output power of 650W and uses 50% only, so input power will be 1300W... isn't that too much for a microwave? And btw, the reading on the back of a device - it is the input power, right?
I have this question in my homework:
A heater has power of 2.5 KW, it has been on for 12 hours.
a) How much will cost... (that is easy)
b) Explain why the electrical bill for such a device is smaller then what was calculated before (in A).
Our teacher said this in class: the consumer unit counts the incoming power and subtracts the outgoing power.
I may have misheard exactly what he said, but I think he said it like this. This really confused me! If the consumer unit really subtracts unused electricity then shouldn't it be too easy to make a "electric bill hack" - uses something like a generator?
I have heard about "hacking" the consumer unit by using magnets to stop the rotor, but I have also heard about some other devices, that plug in to the socket. One was something like a impulse generator, that does damage to the consumer unit, but the other one seems to cost few 1000$ and seems to somehow lower your bills. I don't really know nothing more about them and that is maybe why I don't know this answer.
Btw, output power is the power that will be turned in to practical energy (microwave oven, electricity to microwaves). It's just said here that microwave has output power of 650W and uses 50% only, so input power will be 1300W... isn't that too much for a microwave? And btw, the reading on the back of a device - it is the input power, right?