How many kilowatts of electricity does a fan with voltage of 220 V ~ frequency of 50 Hz need to operate for 12 hours? Ceiling fan~

How many kilowatts of electricity does a fan with voltage of 220 V ~ frequency of 50 Hz need to operate for 12 hours? Ceiling fan~

It depends on how many watts your fan is. One kilowatt per hour is electrified. Generally, it is 65 watts per hour. Twelve hours is 65 watts. The remaining 12 hours is 780 watts, less than one hour

When the voltage of the AC power supply is 220 V and the frequency is 50 Hz, the brightness of the three white weaving lamps is the same. Now the frequency of the AC power supply is changed to 100 Hz. What's the brightness of the lamps? (Note: the lamps are connected in series with capacitors, etc. with inductors, etc. with resistors, and then connected to 220 V voltage.)

After increasing the frequency, the brightness of the three lamps is the brightest in series capacitor, the second in series resistor and the darkest in series inductor

The frequency of domestic electricity in our country is f = 50 Hz and the voltage is 220 v
The frequency of domestic electricity in our country is f = 50 Hz and the voltage is 220 v
(1) The period T
(2) Peak voltage of alternating current um

The reciprocal of the frequency is the period T, that is, 20 ms. the peak value of AC voltage um is the root sign 2 times 220 V, which is equal to 311 v

Why use 450 V capacitor for 220 V motor capacitor

The voltage of alternating current is changing every minute and every second. The commercial power we use is sinusoidal alternating current. 220 V refers to its effective value, which is convenient for power calculation, that is, voltage * current equals power. Since it is a sine wave, there is a maximum value, which is 1.414 times of the effective value, that is 311 v. for safety, 450 V capacitor is selected