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Janet Harroun
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How many watts in a curling iron?
The current draw in amps mulitiplied by the voltage.
Why is ammeter connected in series with the load?
A ammeter will tell you how much current draw the load is drawing
How heavy is a typical laundry dryer?
Most residential dryers run off a 30A 240V outlet. Indiviually their power ratings will vary, but they shouldn't draw more than 5.7kW. The typical dryer weighs something over 100 pounds to something under 150 pounds. Kind of a big window, but without specifics....
There is a current of 0.83 A through a light bulb in a 120 V circuit What is the resistance of this light bulb?
If a lightbulb has a resistance of 250 ohms, the voltage required for the bulb to draw a current of 0.5 A is 125 V. (Ohm's law: voltage equals current times resistance)Unfortunately, its more complicated than that...Is the resistance of 250 ohms the hot resistance or the cold resistance? It matters. It matters very much.Light bulbs have a dramatic positive resistance to temperature coefficient. It is not uncommon for the instantaneous on power to be 10 or 20 times the nominal value.So, if the 250 ohms is the measured resistance while operating at a current of 0.5 A, then 125 V is the correct answer. If the resistance is the cold resistance, you need to go back and find out the hot resistance at the desired operating point.
What is the ideal voltmeter high or low?
Ideal Voltmeter has an infinite resistance so it won't draw current from the circuit, but in real life ideal voltmeter doesn't exist.
120v how much current does a 1500w resistace heater draw?
The formula you are looking for is I = W/E.
How much current does a 75 watt light bulb draw from a 120v wall outlet?
It's 75/120 and the answer is in amps.
Why would a high watt lamp draw more current than a low watt lamp?
Power is measured in Watts, power (Watts) = E (volts) x I (current - amps) current is determined by the internal resistance (R) of the lightbulb, the lower the resistance the more current will flow. 120v x 0.5a = 60W 120V x 0.83a = 100W the 100W lightbulb will draw more current We also have Ohm's law: E(volts) = I (amps) x R (ohms) Household voltage stays the same at 120v we have for a 100w lamp: 120v = I x R R = 120v/0.83 amps R = 144.6 ohms for a 60w lamp: 120v = I x R R = 120v/0.5 amps R = 240 ohms The higher watt lamp has lower resistance.
Can you plug two appliances a 120v and a 110v on the same line which is a 110v?
Should be ok provided you do not draw too much current.
A clothes dryer uses 5500 w of power when connected to a 220-v ac line how much current does the dryer draw from the line?
5500Watts/220V=25 Amps
The identification plate on a microwave oven states that at 120V its power rating is 1320W and its normal maximum output is 1200W calculate the efficiency of this microwave?
Now this is yet another example of where a student obviously needs to pay more attention in class!! If you dare, ask your instructor. He or she isn't just there to draw a paycheck.
Does a pool pump on 220 volts use the same amount of energy as a 110 volt?
Assuming it is also rated for 120V., yes. The wattage doesn't change with an increase or decrease in voltage. However, the current draw does. When you double the voltage a load is hooked up to, the Amperage draw (current) drops in half. Example: if a 240 volt heater draws 6 amps, it will draw 12 amps if connected to 120V. If a 120V heater draws 15 amps, it will draw only 7.5 amps when connected to 240V. But power, or wattage stays the same, regardless. And this is what is used to calculate energy usage and therefore, cost. Please note the above answer says "if it is also rated for"
Why does the furnace kick out the breaker?
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.
Can a 130W fan be installed into a 120V outlet?
Yes, a 130 watt fan can be plugged into a 120 volt receptacle. The current draw will be I = W/E, Amps = Watts/Volts = 130/120 = 1.08 amps.
How many amps would a 150 watt bulb draw in a 120v circuit?
1 amp
How many amps does 65 watt light bulb draw?
A 65 Watt incandescent light bulb should draw 65W/120V = 541.67mA
If you put a 240V 40W bulb with A19 base into a 120V fixture will the lumination be 40W or 20W because the current is one-half?
Treating this as an ideal resistance, voltage will be half, so current will be half. Power (which is V * I) is one fourth, so you will only draw 10W.
