- What are the 4 factors that affect resistance?
- How do I calculate resistance?
- What is the difference between resistance and resistivity?
- What happens if resistance is increased?
- Is high resistance Good or bad?
- What causes a high resistance fault?
- What causes high resistance in a circuit?
- What does a reading of 0 ohms mean?
- What is a high resistance fault?
- Why resistance is directly proportional to length?
- What are the factors that affect resistance?
What are the 4 factors that affect resistance?
There are 4 different factors which affect resistance:The type of material of which the resistor is made.The length of the resistor.The thickness of the resistor.The temperature of the conductor..
How do I calculate resistance?
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.
What is the difference between resistance and resistivity?
Resistance is the physical property of a substance because of which it opposes the flow of current i.e. electrons. Resistivity is the physical property of a particular substance which is having particular dimensions. … Resistivity is only proportional to the nature and temperature of the particular material.
What happens if resistance is increased?
The relationship between resistance and the area of the cross section of a wire is inversely proportional . When resistance is increased in a circuit , for example by adding more electrical components , the current decreases as a result.
Is high resistance Good or bad?
Low resistance, for example 1Ω or less implies that the circuit is a good conductor made from materials such as copper, aluminium or carbon while a high resistance, 1MΩ or more implies the circuit is a bad conductor made from insulating materials such as glass, porcelain or plastic.
What causes a high resistance fault?
Spiral Heating caused by broken or snipped conductors (above). Resistance, opposition to current flow in a circuit. Connection anomalies pose resistance problems in our motor circuits and if they are not identified and corrected, they can have deleterious effects.
What causes high resistance in a circuit?
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 does a reading of 0 ohms mean?
A measurement of Zero, or very close to zero (less than .5 OHM) indicates a very low resistance to current flow. Applying voltage to this low level of resistance will result in extremely high current flow.
What is a high resistance fault?
A high-resistance connection (HRC) is a hazard that results from loose or poor connections in traditional electrical accessories and switchgear which can cause heat to develop, capable of starting a fire. … Electrical equipment should be regularly maintained by competent people.
Why resistance is directly proportional to length?
As the length increases, the number of collisions by the moving free electrons with the fixed positive ions increases as more number of fixed positive ions are present in an increased length of the conductor. As a result, resistance increases.
What are the factors that affect resistance?
There are several factors that affect the resistance of a conductor;material, eg copper, has lower resistance than steel.length – longer wires have greater resistance.thickness – smaller diameter wires have greater resistance.temperature – heating a wire increases its resistance.