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The resistor is used in a electric circuit normally:
1)To increase or decrease the ac/dc current in any electric current path.
2)To obtain variable ac/dc voltages from a fixed ac/dc voltage using multiple resistors.
3)To vary the timing or frequency (pitch in music) in conjunction with a capacitor.
4)Controlling the volume of sound in speakers is done by varying resistances somewhere in the amplifier stages is a good example.
The capacitor is used in a circuit normally (few examples):
1)In AC to DC converters (rectifiers) and to eliminate any ac component in any dc voltages (to get smooth dc voltage)
2)To filter out unwanted frequencies interfering in a desired frequency of signal for example ECG, EEG, PPG in medical field.
3)Tuning to a particular frequency (in other words 'station') in radio receiver in conjunction with inductance coils.
4)To vary the time in a timer circuit in conjunction with resistor.
Hope this information will be of help to you to some extend.
Wiki User
∙ 12y ago
Wiki User
∙ 9y agoA resistor is used in a circuit when the designer determines that the electrical property of resistance is requiredsomewhere in the circuit for it to operate. Its as simple as that. However selecting the correct value of the resistor as well as its wattage, tolerance, etc. is far less simple and must take into account values and types of many other components in the circuit.
Wiki User
∙ 13y agoI want you to tell me the answer
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A 1.2 k ohms resistor is placed across an 18-V source The minimum acceptable power rating for the resistor is?
1/2 watt (In theory you could use a "0.27 Watt" resistor, however there would be no safety factory and there is no standard value resistor that size.)
Why you use 250 Ohm resistor in series with HART protocol communication?
You need to use the 250 Ohm resistor in series with HART protocol communication because it acts as a shunt resistor.
A 5 ohm resistor a 10 ohm resistor and a 15 ohm resistor are connected in series to a 120 volt power source. What is the amount of current flowing between the 5 ohm resistor and the 10 ohm resistor?
The current would be about 20 volts.
Where you can find a variable resistor on Multisim?
possibly use a potentiometre
How do you use an amplifier?
Amplifiers comes in IC packages diagram is triangle with +/- input by adding a resistor r1 in series to the - input the gain can be found by adding a resistor from output to the - input The + terminal must be satisfied with the proper resistor
What is the value of resistor do you use in 2.5volts bulb with use 4 batteries with 1.5volts?
If your batteries were in series the total voltage would be 6 volts, and it the bulbs were in series you would need a resistor to keep them from burning out. In order to know how many ohms the resistor would need to be you would have to know the wattage of the bulbs, or the resistance of the bulbs. If you don't know the best thing to do is use a variable resistor. Then you can adjust it or the brightness that you want.
Where would you find a material which is a resistor?
Where would you find a material which is a resistor? You can find a resistor material in Europe
Can you use a 91ohm resistor in place of 100ohm resistor?
It depends on where you are going to use this resistor and what its application going to be. If the circuit you are using can tolerate this then you are fine.
Why you use resistor with variable resistor?
Often we want to easily change a resistor value, so we use a variable resistor. For example, we may want to change the resistor that controls the power sent to a LED, so we can easily make it brighter or dimmer. Often if we use a variable resistor, there is only a very narrow range that is useful. Continuing our example, sometimes we use several LEDs, and we use the variable resistor to set them all to the same brightness. In this case, the resistance range that sets the LED to be twice as bright as the the other LEDs, and the resistance range that sends so much power to the LED that it is permanently destroyed is even less useful. So we add a fixed resistor in series with the variable resistor -- the fixed resistor sets the minimum net resistance, no matter how we turn the knob on the variable resistor. In our example, the addition of the fixed resistor allows us to turn the variable resistor throughout its whole range, and the LED gets brighter and dimmer; without that resistor, a certain range of the knob on the variable resistor would allow so much power to go to the LED that it would be destroyed.
What resistor should you use to get 9v to 6v?
You can only use a resistor to drop a voltage at a constant current. If you know the current, use Ohm's law to calculate the resistor value.
A 1.2 k ohms resistor is placed across an 18-V source The minimum acceptable power rating for the resistor is?
1/2 watt (In theory you could use a "0.27 Watt" resistor, however there would be no safety factory and there is no standard value resistor that size.)
How do you use resistor in a sentence?
I installed a resistor inline with my oil pressure sensor. The resistor in a circuit will usually disperse energy as heat.
Can you calculate the resistance of a component using a meter and a resistor?
yes you can! you can use a multimeter and a resistor.
Why you use 250 Ohm resistor in series with HART protocol communication?
You need to use the 250 Ohm resistor in series with HART protocol communication because it acts as a shunt resistor.
Why would your blower fan resister stop working?
Because for each speed except the higgest one, to slow the motor of the fan, a resistor is choose and it's a big resistor, bigger to slow the speed and after long use or if the motor is defect (use to much currant), the resistor burn and no currant can pass trough
Do you use resistor spark plugs with resistor wire plug ends?
No, Using a resistor spark plug with resistor wires can create too much resistance for the ignition system.
What are the three methods to determine the value of a resistor?
Basically you can either read the resistance that is printed on the resistor (with a special color code, which you would have to learn), or you can use Ohm's Law, by measuring a voltage through the resistor and the corresponding current. I am not aware of any third method.
