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The protecting resistor is put in series with the LED so that you have a voltage divider - the supply voltage is split across the LED ( max 0.6v) and the remainder across the protecting resistor. So if your supply is 6volts, 5.4v will be across the resistor,

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Q: What is a protective resistor?
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Continue Learning about Electrical Engineering

Which electrical protective device is designed to detect a difference in a current between circuit wires and interrupt the circuit and stop the flow of electricity?

A resistor is a device designed to detect difference in current and stop the flow of electricity. On most every type of electric engine or circuit has a resistor.


Why resistor should disconnected from the circuit when measured the value of resistor?

if not disconnected you will measure the resistance of the circuit in parallel with the resistor.


What is the relation between the size of the resistor and its value?

There is no relation between the resistor's ohms value and its size. The power of the resistor can be seen by its size. If the power is too small, the resistor can be destroyed.


When you short out a resistor in a parallel circuit why does the current lower?

The total resistance of a set of resistors in parallel is found by adding up the reciprocals of the resistance values, and then taking the reciprocal of the total. By removing a resistor the total current will lower. If you short out the parallel circuit as suggested it will take out the fuse that should be protecting the circuit.AnswerShorting-out a resistor in a parallel circuit, will act to short out the entire circuit, therefore, significantly increasing, not lowering, the current! And, as the previous answer indicates, this short-circuit current will operate any protective devices, such as a fuse.In a parallel circuit current does not lower but it will be increase if shorting-out one resistor in the two resistor parallel circuit, the circuit will become very low resistive and the larger current will flow through the short path.


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.

Related questions

Which electrical protective device is designed to detect a difference in a current between circuit wires and interrupt the circuit and stop the flow of electricity?

A resistor is a device designed to detect difference in current and stop the flow of electricity. On most every type of electric engine or circuit has a resistor.


Where is the blower motor resistor on a right hand drive jeep Cherokee 2002?

On my 1997 RHD Cherokee, the restistor is under the dash on the left hand side. I had to remove a protective panel to access the resistor. My resitor is held in place by two screws and has a four wire connector. Good luck!


Why use surge protecting resistor to generator rotor winding?

To limit the fault current used surge protective resistance in generator rotor winding to protect the rotor winding heavy damage.


What is the end of line resistor used for in fire alarm circuits?

An End of Line resistor is used to create a small constant load in a protective zone or loop. The control panel monitors the current in the loop to detect if the wires have been cut open, or shorted, both of which would be either a "trouble" or "alarm" indication.


How do replace a blower motor resistor?

Safety Tip: Always wear safety glasses when working on your motor. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or closed toe shoes. 1.Remove the negative battery terminal. 2.Locate the blower motor resistor on the passenger side under the dash board. It is mounted to the the blower housing near the blower motor. 3.Disconnect the electrical connector to the blower motor resistor. 4.Remove the screws or bolts to the blower motor resistor and remove the resistor. 5.Installation is the reverse of the removal.


How do you replace a blower motor resistor?

Safety Tip: Always wear safety glasses when working on your motor. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or closed toe shoes. 1.Remove the negative battery terminal. 2.Locate the blower motor resistor on the passenger side under the dash board. It is mounted to the the blower housing near the blower motor. 3.Disconnect the electrical connector to the blower motor resistor. 4.Remove the screws or bolts to the blower motor resistor and remove the resistor. 5.Installation is the reverse of the removal.


Is Light dependent resistor an example of resistor?

yes, a variable resistor


Who invented the resistor?

Otis F. Boykin invented the wire precision resistor and the electrical resistor.


What is the function of a cement resistor?

A cement resistor is typically used as a power resistor (a resistor whose power rating is greater than 1 W).


Describe the purpose of the coloured bands on a resistor?

The purpose of colored bands on a resistor is to tell whoever is installing the resistor the amount of resistance that particuliar resistor has.


What are resistor values defined by?

Resistor value is defined by the Resistance the resistor offers in Kilo ohms/ohms value given by color codes on the resistor.


What is the difference between an ohmic resistor and a non-ohmic resistor?

A non-ohmic resistor doesn't have a constant resistance. A ohmic resistor has a constant resistance.