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Can resistors be used to use a 110 volts rated hairdryer in a 220 volt source?
Wiki User
∙ 12y ago
Resistors could be used if you can find resistors with a high enough wattage rating to dissipate the heat that they will generate. Your best bet is to purchase a voltage adapter. The adapter is just a transformer that steps down the voltage from 220 to 110 volts. Locate on the hair dryer what the wattage draw is and then match the transformer (adaptor) to that wattage output.
Wiki User
∙ 12y ago
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What does a 20v marking on a device indicate?
rated for 20 volts?
How do you reduce 48 volts dc to 12 volts dc with resistors?
Yes. You can use a voltage divider. Say, for instance, one 1KOhm resistor in series with a 3KOhm resistor. Connect the 3k resistor to the 48 volts and connect the 1k resistor to ground. The 1k resistor will have 12 volts acress it. These resistors need to be at least 1 watt each as they are going to dissipate 0.576 watts and get warm. Now, if you attempt to pull power from the 1k resistor, note that regulation will be poor because the impedance of the load will go in parallel with the 1k resistor and change its value.
The working voltage of a capacaitor is rated in ac or dc volts?
DC
What does 35V and 1000uF on capacitor specify?
1000 microfarads is its rated capacitance, while 35 volts is its rated voltage.
Will a switching power supply work on 277 volts?
Not unless it is rated for that voltage. You can likely find a step down transformer from 277 volt sto 120 volts.
What is the current of a 25volt resistor?
Resistors are rated in ohms for their resistance value and in watts for the power they are capable of handling. They are not rated in volts or current.
What is the current flowing in a circuit which has two resistors of 4 ohms each connected in parallel to a power source of 24 volts?
Three 214 K Ohm resistors in series is 656 K Ohms. Across 24 volts, that is about 0.03659 milliamperes.Three 214 K Ohm resistors in parallel is about 71.3 K Ohms. Across 24 volts, that is about 0.3364 milliamperes.RSeries = SummationI=1toN (RI)RParallel = 1 / SummationI=1toN (1 / RI)Current = Voltage / Resistance
What current flows through a 920 watt hairdryer if the voltage is 230 volts?
4 amps
What is the current in a parallel circuit which has two resistors (17.2 ohms and 22.4 ohms) and a power source of 6.0 volts?
By Ohm's Law, current is voltage divided by resistance, so a voltage of 6 volts across a resistance of 24 ohms will develop a current of 0.25 amperes.
What ohm value or what combenation of resistors are needed to draw 20amps at 120v?
ohms = volts/amperes 6 ohms = 120 volts / 20 amperes
How many amps in the related link circuit between A and B?
The related link describes a 100 volt source driving three unknown resistors in series, with a fourth resistor of 10 ohms in parallel with one of the three resistors. It is stated that the voltage across the 10 ohm resistor is 20 volts. By Ohm's Law, current is voltage divided by resistance, so the current through the 10 ohm resistor is 2 amperes. Since you were provided with the voltage across the 10 ohm resistor, it does not matter what the value of the other three resistors is. However, and this is important to note... The voltage source and three resistors are not shown with any kind of connection to ground, so the circuit, as drawn, is invalid. Nevertheless, the voltage stated across the 10 ohm resistor was 20 volts, so there must be some kind of connection, and that was the basis for the calculation above. If, on the other hand, the 20 volts is referenced to the voltage source, then the current from A to B is zero, because there is no circuit involving the 10 ohm resistor.
How is the wattage of a circuit divided amongst resistors in series of varying ohmic and wattage ratings?
The voltage supplying the circuit will be divided across the series resistors in proportion to their resistance. The wattage of the resistors has no effect on the distribution, but if you put an under rated resistor in the circuit, it will fail. For example, if you have a 10v source, and a 1 ohm resistor in series with a 3 ohm resistor, the 1 ohm resistor, being only a quarter of the total resistance, will see a quarter of the voltage, or 2.5 volts. The other 7.5 volts will seen across the 3 ohm resistor. The total power consumed by the circuit is given by P = VI or V2/R or I2R, so for this circuit, the resistors will consume 25 watts (current is 10/4 = 2.5 amps according to Ohms Law), and 10 x 12.5 gives 25 watts. Hope that helps ItAintMe
When three resistances are wired in series operating on 15v each resistance receives what volts?
It depends on the value of the three resistors. If they are equal, then each resistor has 5 volts across it.
Can a massage machine rated at 220 volts be used on 110 volts?
No. The machine must be used on the nameplate rated voltage.
Maximum rated voltage for a diode is?
Highly variable, depending on the type. For example a 1N457 is rated for 79 volts, while a 1N4007 is rated for 1200 volts.
What is the difference in 30 amp 250 volt and 30 amp 600 volt?
Devices are rated by voltage and amperage. If you have a source rated for 600 volts you can use a 250 volt device, but not vice versa.
What would be the total current and voltage dropped for each of the two resistors 7 and 9 ohms be if they're supply voltage is 230 volts?
Please specify whether the resistors are connected in series or in parallel.
