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Ohms does not equal watts. You need to know what voltage is across the resistor to determine how many watts it is drawing or how many watts the resistor should be rated for.
Power is the voltage across the resistor SQUARED divided by the resistance. If this 4 ohm resistor has 12 volts across it then the watts power is (12 x 12) / 4 = 36 watts.
1 Watt equals 1 Volt times 1 Amp.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoThat depends on circuit voltage.
1 watt is equal to 1 volt times 1 amp.
4 amps could be 4 watts at 1 volt, or 1000 watts at 250 volts.
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4 volts is a many watts?
4 volts and how many amps? Watts = amps x volts. It depends on the amount of current (in Amps) flowing at 4 Volts... See Ohms Law: Watts = Volts x Amps If you have 2 Amps flowing at 4 Volts you are dissipating/consuming 8 Watts. If you have 10 Amps flowing at 4 Volts you are dissipating/consuming 40 Watts.
How many watts does a charger have?
It depends on what kind of charger your talking about. Im assuming some type of smart phone charger... typically about 5.1 volts at .8 to 1 amp.... current ( amps) times voltage equals power (watts) so.. around 4 to 5 watts
Three resistors R1 2 R2 4 and R3 6 are connected in series to a battery of 36 V The total resistance in the circuit is?
Resistors placed in series create a total resistance that is found by simply adding the values of the resistors. (Knowing the applied voltage isn't necessary to solve this problem.) Rt = R1 + R2 + R3 = 2 ohms + 4 ohms + 6 ohms = 12 ohms
How many factors are in 9 times 4 equals 36?
Two factors. 9 and 4 are factors of 36.
Can you bridge an 8 ohm speaker to 4 ohms?
Ohms is a measure of resistance. When the electricity passes into the speaker, some of it is 'resisted.' The ohms rating of the speaker is how much is resisted, and an indication of how much energy it takes to drive it - the higher the ohms rating, the more difficult it is to drive.
How many ohms in 800 watts?
4 ohms
How many watts does the Rockford Fosgate Power 150a1?
75 x 1 Watts RMS @ 4 Ohms 150 x 1 Watts RMS @ 2 Ohms
How much ohms does 1500 watts speaker has?
The wattage and ohms of a speaker are not related; the resistance for speakers is usually 4 or 8 ohms.
How many watts is alpine v12 mrv-f505 amplifier?
The Alpine v12 MRV-F505 amplifier puts out up to 200 watts of RMS power at 4 Ohms and using 12 volts. At 14 volts, it puts out up to 400 watts of RMS power with a bridged 4 Ohms ratio.
You have an Alpine type X 1243D subwoofer you are trying to decide if running it at a 2ohm load at max power or a 4ohm load at two thirds of its power range will work better?
Multiple subs wired together must be the same coil type and impedance. If they’re not, the power won’t divide evenly between them, and some subs would probably be over-powered while others get under-powered. If you want to run different types of subs in a system, each type needs to have its own separate amp. Then, multiply the number of subs you have by the RMS rating of each, to get their total RMS rating. You want to make sure the amp you choose will supply no more than the sub system’s total RMS rating. Figure out the possible total impedance(s) that the subs can be wired together to form. (SVC = single voice coil, 1 pair of terminals; DVC = dual voice coil, 2 pairs of terminals.) 1 SVC 2-ohms can only have 2 ohms of impedance 1 SVC 4-ohms can only have 4 ohms of impedance 1 DVC 2-ohms can have 1 ohm or 4 ohms of impedance 1 DVC 4-ohms can have 2 ohms or 8 ohms of impedance 2 SVC 2-ohms can have 1 ohm or 4 ohms of impedance 2 SVC 4-ohms can have 2 ohms or 8 ohms of impedance 2 DVC 2-ohms can have 2 ohms or 8 ohms of impedance 2 DVC 4-ohms can have 1 ohm or 4 ohms of impedance 3 SVC 2-ohms can have 6 ohms of impedance 3 SVC 4-ohms can have 1.3 ohms of impedance 3 DVC 2-ohms can have 1.3 ohms or 3 ohms of impedance 3 DVC 4-ohms can have 2.7 ohms or 6 ohms of impedance 4 SVC 2-ohms can have 2 ohms or 8 ohms of impedance 4 SVC 4-ohms can have 1 ohm or 4 ohms of impedance 4 DVC 2-ohms can have 1 ohm or 4 ohms of impedance 4 DVC 4-ohms can have 2 ohms or 8 ohms of impedance Look for an amplifier that can put out power up to the RMS wattage at an impedance load the subs can be wired to form. 8 ohms — figure on the amp putting out half the power it would at 4 ohms 6 ohms — figure on the amp putting out three-quarters of the power it would at 4 ohms 3 ohms — figure on the amp putting out the average of what it would at 2 ohms and at 4 ohms 2.7 ohms — figure the same as for 3 ohms, and add a few watts 1.3 ohms — use the 1-ohm spec and take away a few watts Example: You have two Alpine S Series S-W8D4 8" subwoofers and you want the right amp for them. They are DVC 4-ohm subs rated at 300 watts RMS each. Two 300 watts RMS subs together need a maximum total of 600 watts RMS. Using the chart in Step 2, 2 DVC 4-ohm subs can be wired together to form a 1-ohm, a 4-ohm, or a 16-ohm load. The last is too high a load to be practical, so you’ll look for an amp that can put out up to 600 watts RMS into either a 4-ohm load, or a 1-ohm impedance load: up to 600 watts RMS x 1 at 4 ohms, or up to 600 watts RMS x 1 at 1 ohm Among Crutchfield’s selection of amplifiers you’ll find: Memphis Audio PRXA600.1 — 600 watts RMS x 1 at 1 ohm JL Audio JD1000/1 — 600 watts RMS x 1 at 4 ohms Kicker KEY500.1 — 500 watts RMS x 1 at 1 ohm Any one of these high-quality amplifiers would work well with those subs. It doesn’t matter which impedance an amp plays through — 600 watts RMS through a 4-ohm load produces the same volume as 600 watts RMS through a 1-ohm load. You have a Memphis Audio SRX500D.1 amplifier and you want it to drive two subwoofers The amp is capable of 350 watts RMS x 1 at 4 ohms and 500 watts RMS x 1 at 2 ohms. Let’s say you choose to maximize the amp’s potential and want the system to put out 500 watts RMS. This means your subs have to be wired to form a total impedance of 2 ohms. Two subs on a 500 watts RMS amp will want about 250 watts RMS each. So you’ll look for subs each rated for 250 watts RMS or more. Using the chart in Step 3, for two subwoofers, a final 2-ohm load can be achieved with either two SVC 4-ohm subs or two DVC 2-ohm subs. So, you’ll look for two subs that are either SVC 4-ohms or DVC 2-ohms, rated for at least 250 watts RMS each: 2 SVC 4-ohms, at least 250 watts RMS, or 2 DVC 2-ohms, at least 250 watts RMS Among Crutchfield’s selection of subwoofers you’ll find: You have a Memphis Audio SRX500D.1 amplifier and you want it to drive two subwoofers The amp is capable of 350 watts RMS x 1 at 4 ohms and 500 watts RMS x 1 at 2 ohms. Let’s say you choose to maximize the amp’s potential and want the system to put out 500 watts RMS. This means your subs have to be wired to form a total impedance of 2 ohms. Two subs on a 500 watts RMS amp will want about 250 watts RMS each. So you’ll look for subs each rated for 250 watts RMS or more. Using the chart in Step 3, for two subwoofers, a final 2-ohm load can be achieved with either two SVC 4-ohm subs or two DVC 2-ohm subs. So, you’ll look for two subs that are either SVC 4-ohms or DVC 2-ohms, rated for at least 250 watts RMS each: 2 SVC 4-ohms, at least 250 watts RMS, or 2 DVC 2-ohms, at least 250 watts RMS Among Crutchfield’s selection of subwoofers you’ll find: Alpine W10S4 10" — SVC 4-ohm, 250 watts RMS JL Audio 12W0v3-4 12" — SVC 4-ohm, 300 watts RMS Kicker 44CWCS104 — SVC 4-ohm, 300 watts RMS Rockford Fosgate R2D2-10 10" — DVC 2-ohms, 250 watts RMS Hope this helps! (:
What is the voltage if R equals 9 ohms and you equals 4 A?
36v
If you have two 150 RMS watt subs on the same ch of an amp What is the RMS watts needed from the amp?
Depends on the impedance of each speaker. If they are car subs and not converted home speakers, they are probably 4 Ohms each. Depending on how you wire them you get either 8 Ohms or 2 Ohms. 8 Ohms is not a problem load-wise for the amp, but if it is rated at 100 watts into 4 Ohms, then you will only get 50 watts into 8. Many car subs nowadays will handle a 2-Ohm load, but some will not. Your two speakers will handle 2x150 watts or 300 watts. An amp that is rated to drive 300 watts into 4 ohms will either deliver more like 500 watts into 2 Ohms, or it will melt through the floor of your car. So you need to look up the specs for your amp in the instruction manual. If it will only run into a 4-Ohm load, you can only use one 4-Ohm sub per channel. If it will handle a 2-Ohm load, you will have to turn it up slowly or you will blow your speakers out. Mr Ohm and his law will not be denied.
8 Ohm plus 8 Ohm equals?
16 Ohms. Yes 16 ohms in series. 4 ohms in parallel
4 volts is a many watts?
4 volts and how many amps? Watts = amps x volts. It depends on the amount of current (in Amps) flowing at 4 Volts... See Ohms Law: Watts = Volts x Amps If you have 2 Amps flowing at 4 Volts you are dissipating/consuming 8 Watts. If you have 10 Amps flowing at 4 Volts you are dissipating/consuming 40 Watts.
If an amplifier has an output of 350 watts rms 8 ohms what is the output at 4 ohms?
There is no amplifier with an output impedance of 8 ohms or 4 ohms on the market. All audio amplifiers really have an output impedance of less than 0.1 ohms. Scroll down to related links and look at "Amplifiers, loudspeakers and ohms"
If you have 500 watts at 4 ohms how many watts do you have at 8 ohms?
250 watts approximatelyI assume you have a constant voltage supply. According to P=V^2/R => P*R=V^2, you have a 44.7 volt supply. If you change Resistance to 8 ohms, P=44.7^2/8 => P=250 watts.
How does one practically apply ohms to amplifier vs speakers?
the watts for 2 ohms is more than 4 ohms. depending on the ohms your speakers take up and the wattage the speakers use, tells you what size amp you need.
