E = I R = 22 x 7 = 154 volts.
Power (Watts) = Current (Amps) * VoltagePower = 22Amps * 240 VoltsPower = 5,280 Watts5280
V=I*R Where: V is voltage I is the current in ampers R is resistance in ohms. So, if the current is 15 A and the resistance is 5 ohms, then the voltage must be 15 A *5 ohms = 75 V.
No, it opens the circuit so that no current flows.
The net effective resistance of 5 ohms, 10 ohms, and 20 ohms in series is 35 ohms.The current through the net effective resistance is [ I = E/R ] = 120/35 = 3.429 Amp. (rounded)Note: If you try this at home, be aware that these resistors will dissipatethe 5 ohm . . . 58.8 wattsthe 10 ohm . . . 117.6 wattsthe 20 ohm . . . 235 watts .These are no ordinary resistors, such as hang on the wall in plastic bags at Radio Shack.These would have to be 'power' resistors ... like heating coils in a toaster or hair-dryer.
There are a couple ways to vent a dryer, my personal favorite is the dryer vent vacuum. They also have dryer vent hoods, and kits available for installation that will increase the effectiveness of your dryer.
Your hair dryer has a resistance of 220/12 = Ohms. (I'm sure you can do the math.)
We know that Voltage = Current x Resistance, so if E = I x R, then E = 20 x 12 = 240 volts, and the dryer must be plugged into a 240 volt outlet.
Power (Watts) = Current (Amps) * VoltagePower = 22Amps * 240 VoltsPower = 5,280 Watts5280
The formula you are looking for is E = I x R.
4800 watts because watts = volts x amps.
Resistance=Voltage2/Power =1202/1100 =13.1 (3sf)
Because a higher resistance would have resulted in more heat loss, but the higher is he current, the more energy is lost to heat. Therefore, a lower resistance would release more heat.AnswerPower is equal to voltage squared divided by resistance. So, for a given voltage, the lower the resistance the higherthe power.
watts = volts X amps, so: 15A X 240V = 3600 watts
Appliances with motors or compressors are associated with surge current at start up. That is because it takes more energy to get the motor turning and less current to keep it spinning once it is at speed. Some types of appliances that fall into this category would include refrigerators (Compressor), washing machine, dryer, air conditioner and so on.
Yes, it's called a step-up transformer because, if I understand correctly, you want to step up from a 110v power source to run a 220v dryer. Depending on the power (wattage) rating of the dryer, it will probably cost as much as having 220v service installed by an electrician. Furthermore, the 110v circuit must be fused for at least twice the current rating of the dryer, assuming the transformer is 100% efficient. This is because Power = Voltage x Current. If you halve the voltage (220 --> 110), you must double the current in order to maintain the same power rating. For example, if the dryer normally draws 20 amps at 220 volts, it will require at least 40 amps from a 110 volt circuit. This would require a 4000 volt-amp transformer-- a very pricey item indeed. If you opt for such a unit I would certainly consult a certified electrician.
This could cause a problem with higher resistance. You should replace.
The only reason the dryer breaker will trip is it senses an overload or a short circuit on the circuit. To test this unplug the dryer and see if the breaker will stay latched. If it does then the wiring to the receptacle is not at fault. If you want to delve further into the problem, leave the dryer unplugged and remove the inspection panel at the back of the dryer and check the connections. Sometimes the screw terminals become loose and corroded and cause the dryer to draw more current. To compensate for the higher resistance at the faulty terminals the dryer will try to draw more current that the breaker will allow. If everything looks good after trying both of these things it is time for a repairman to come in and look at the dryer itself, as the fault is probably an internal problem within the dryer body.