0
Unwanted or high resistance in a automotive circuit is usually caused by corrosion around terminal points. Start at the battery terminal connections and work your way through the circuit cleaning any terminal corrosion that you see. Take the termination apart and clean the faces that touch each other. If possible tape the joint to keep air from the connection as it is this oxidation that is the main culprit.
What else can I help you with?
How many ohms is a 120 volts?
"Volts" is electrical pressure applied to a circuit; whereas, "ohms" is electrical resistance to that pressure. One cannot determine ohms from voltage without knowing either the current (in "amps") or power (in "watts"). A normal 120V household circuit can handle a maximum of 20 amps, so using ohm's law of resistance = voltage / current, the minimum resistance required in a 120V household circuit would be 6 ohms. Any less than 6 ohms will cause the circuit breaker to trip.
What does the resistance of the flow of electrons cause?
it cause no electricity because of the resistance but.... if your question was..... "the caused by the flow of electrons" then the answer well be ( it cause electricity )
When the resistance in a circuit increases what happens to the current flow?
"Ohms Law" defines resistance (R) as the the ratio of voltage (V) to current (I).R = V/IIf you move those variables around, you can get the formula:I = V/RSo you can see that when resistance increases, current flow will decrease.CommentResistance is most definitely not defined as 'the ratio of voltage to current', although that ratio may tell you what it happens to be.Resistance isn't a variable in the Ohm's Law equation. It is a constant because it is unaffected by either current or resistance.
Why is a short circuit considered a safety hazard?
A spark from a short circuit can cause a fire .
Why must power be turned off when measuring the resistance of a circuit?
If an external Voltage is applied to a multimeter while the multimeter`s function switch is in the Ohm meter position then the Ohmmeter is apt to be destroyed or disabled. Therefore the simplest answer is that the power must be turned off in order to avoid damage to the Ohm meter and possibly to yourself caused by Voltages present in the circuit while the power is own. Another reason of course is because a valid Ohm reading can not be obtained while Voltages are present across the resistance that is being measured because the Ohmmeter itself applies a Voltage across the resistance and then a sampling of the current through the unknown resistance is used by the Ohmmeter`s circuitry to cause a calibrated deflection of the Ohmmeter and thus display on the meter`s dial the Ohmic value of the unknown resistance. For the same reasons as above it is also a good practice to discharge all the capacitors in the circuit after the power is turned off and before any in circuit resistance measurements are made.
What happens to an electrical circuit when there is unwanted resistance in it?
a common cause of this type problem is corrosion at a connector.
When a dead short occur what happens to circuit resistance?
The circuit resistance is likely to gradually drop and in such case it will cause the circuit to burn down.
What will adding resistance to series circuit cause?
A decrease in current.
What is the most likely cause for resistance to vary in a circuit?
heat
How can an ammeter cause a short circuit?
An ammeter can cause a short circuit if it is connected in parallel instead of in series with the circuit being measured. This can create a low resistance path for the current to flow, bypassing the intended circuit and causing a short circuit.
A dangerous circuit with low resistance and high current?
Another name for a circuit with low resistance and high current is a short circuit. It is dangerous because, if you have sufficient energy in the power source, you can damage components and/or cause fires.
Would cause high resistance in a closed electrical circuit?
corroded/dirty connections
Does current or resistance cause breakers to trip?
Excessive current is what causes circuit breakers to trip. When the current in a circuit exceeds the rating of the breaker, it trips to prevent overheating and potential fire hazards. Resistance itself does not cause breakers to trip, but it influences the amount of current flowing in a circuit.
Why one of the leads of resistor connected in electronic circuit is opened while measuring its resistance?
You open one of the leads of resistor connected in electronic circuit while measuring its resistance in order to not introduce error cause by other components in the circuit.
An increase in resistance in a circuit will cause?
In a simple circuit, lowering the voltage will not cause the resistance to do anything. Lowering the voltage will, however, cause the current to also lower.This ignores temperature coefficient. If there is substantial power involved, a typical bulb, for instance, will grow cooler and its resistance will decrease when you lower the voltage, but that is usually a small effect.
What is the effect on current in a wire if both the voltage across it and its resistance are doubled?
it will cause a Short Circuit
How is the concept of resistance in an electrical circuit similar to the flow of water through a narrow pipe?
In an electrical circuit, resistance is like the narrowness of a pipe that restricts the flow of water. Just as resistance limits the flow of electricity in a circuit, a narrow pipe restricts the flow of water. Both resistance and a narrow pipe cause a decrease in the flow rate.
