What effect would high resistance have on a circuit?

What effect would high resistance have on a circuit?

The higher the resistance, the lower the current flow. If abnormally high, one possible cause (among many) could be damaged conductors due to burning or corrosion. All conductors give off some degree of heat, so overheating is an issue often associated with resistance.

What is most likely to occur with a high resistance fault?

Effects. The most common effect of a high resistance connection will be localised heating around the connection. On a high current circuit even a small unwanted resistance (of the order of an ohm) can result in the dissipation of hundreds of watts of power at the joint. This will quickly damage the insulation of cable.

What causes the resistance in a circuit?

Electric current refers to the rate of flow of electric charge, which causes free electrons to flow. As electrons move through the conductor, some collide with atoms, other electrons, or impurities in the metal. It is these collisions that cause resistance.

How does high resistance cause heat?

When current flows through a conductor, heat energy is generated in the conductor. A higher resistance produces more heat. The time, t for which current flows. The longer the time the larger the amount of heat produced.

Why does higher resistance mean higher voltage?

Ohm’s law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to the resistance (R). Similarly, increasing the resistance of the circuit will lower the current flow if the voltage is not changed.

What are the uses of high-resistance?

Materials having high resistivity or low conductivity are very useful for some electrical engineering products and applications. These material are used to manufacture the filaments for incandescent lamp, heating elements for electric heaters and furnaces, space heaters and electric irons etc.

What is a high resistance ground system?

High resistance grounding (HRG) is when the neutral point of an electrical system is connected to ground through a current limiting resistor, detecting ground faults when they occur. When properly designed, such a system will also quickly locate the faulted branch feeder, switchgear or load.

What causes high resistance?

The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance. The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through.

What affects resistance in a circuit?

Resistance is the property of the material that restricts the flow of electrons. There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material.

What is high resistance fault?

What is a high resistance fault? a fault that results in voltage or current being too low for proper circuit operation, due to increased resistance. What are the symptoms of a high resistance fault? abnormal operation or possible no operation, fuse(s) not affected (not open), and circuit breaker(s) not affected.

What causes high resistance in a wire?

An electric current flows when electrons move through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance.

What is the significance of a high resistance in a circuit?

Answer Wiki. Originally Answered: What is the significance of high resistance in the circuit? A high resistance in the circuit means a very low current flowing in it when the voltage of the source is constant. If the source of current is a battery such as a 3 volts button cells the cells will last for a longer time.

What is the available fault resistance?

resistance, the available ground fault current closely relates to the system grounding methods. The fault resistance also depends upon the ground surface materials and earth resistance. Throughout the history of electric power supply, many grounding methods have been developed for distribution

What is the high resistance connection and motor failure?

The High Resistance Connection and motor failure a high resistance connection in an induction-motor electrical circuit results in localized overheating and supply-voltage unbalance, which leads to… EECO | Electrical Equipment Company

What are the common faults in bus electrical system?

The most common electrical circuit faults you will encounter when working on bus electrical systems are: open circuits; short circuits; and high resistance. Open Circuit -any break (open) in the current path of a series circuit makes the entire circuit inoperative. In a parallel circuit, only the branch effected by the open is inoperative.