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In Ohm law what must be greater to maintain the same current in a conductor with more resistance?
Wiki User
∙ 14y ago
ohms law states V = I*R. If I is to remain the same, and R is increased, the voltage must also increase.
Wiki User
∙ 14y ago
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Do conductors have low resistance?
Conductors have low resistance. Recall Ohm's law. The higher the conductor resistance, the greater the voltage drop along the conductor, and the less voltage that is available for the load. The conductor resistance is a resistance in series with the load. Also, higher conductor resistance results in more electrical power being converted into heat, warming up the conductors. This is calculated with the formula P=I2R. The greater the resistance, the greater the power wasted heating the conductors.
Is it true that for the same resistance the greater the voltage the greater the current?
true
How fan regulator works?
A fan regulator is a crucial component that serves to increase or decrease the speed of your fan according to your needs. To understand how a regulator works, you must know something about resistances. Any electrical conductor allows current to pass through it. The conductor however, offers a certain amount of resistance to the passage of current. The resistance depends upon the material of the conductor. The regulator has spools of wire with different amounts of resistances. When you set the knob at a particular position, you include a certain resistance in series with the fan. A series connection implies the resistance is in line with the fan. This reduces the voltage drop across the fan and its speed to your desired level. The greater the resistance, higher is the voltage drop across it and that lowers the speed of the fan.
What happens to resistance when increasing cable length?
this is because there will be more collisions between atoms and electrons as there is a greater distance to travel. The longer the length of wire, the more collisions. It is like a traffic jam, the longer the road, the loner you are stuck in it for.
What do you mean by eddy current loss?
Eddy currents are currents induced in conductors to oppose the change in flux that generated them. It is caused when a conductor is exposed to a changing magnetic field due to relative motion of the field source and conductor, or due to variations of the field with time. This can cause a circulating flow of electrons, or a current, within the body of the conductor. These circulating eddies of current create induced magnetic fields that oppose the change of the original magnetic field due to Lenz's law, causing repulsive or drag forces between the conductor and the magnet. The stronger the applied magnetic field, or the greater the electrical conductivity of the conductor, or the faster the field that the conductor is exposed to changes, then the greater the currents that are developed and the greater the opposing field.
What happens to the resistance as the conductor is measured?
The longer the conductor the greater the end to end resistance.
How Magnetism effect resistance?
Magnetism does not affect the resistance of a conductor. The factors affecting resistance are the conductor's length, cross-sectional area, and resistivity. As resistivity is affected by temperature, temperature indirectly affects resistance. However, the changing magnetic field surrounding a conductor carrying an AC current causes the current to flow closer to the surface rather than being distributed throughout the cross-section of the conductor. The greater the frequency, the greater this effect. This has the equivalent effect of reducing the cross-sectional area of the conductor, causing its resistance to rise. This is misleadingly called the 'AC resistance' of the conductor!
Do conductors have low resistance?
Conductors have low resistance. Recall Ohm's law. The higher the conductor resistance, the greater the voltage drop along the conductor, and the less voltage that is available for the load. The conductor resistance is a resistance in series with the load. Also, higher conductor resistance results in more electrical power being converted into heat, warming up the conductors. This is calculated with the formula P=I2R. The greater the resistance, the greater the power wasted heating the conductors.
Why is aluminum a better conducter of electricity than sodium?
'Voltage' isn't 'conducted'. Voltage can be thought of as 'electrical pressure' which, when applied across opposite ends of a conductor will cause a CURRENT to flow along that conductor. So your question should really be asking, why aluminium conducts a greater CURRENT than iron. The answer is simple. Aluminium is a better 'conductor' than iron. In other words iron resists the flow of current more than aluminium does. Or to express this in another way, iron offers a greater RESISTANCE to the flow of current. Resistance is a natural property of a conductor, with some conductors have more, or less, resistance than other conductors. The best conductor, i.e. the one with the least resistance, is silver -closely followed by copper. Iron is a relatively poor conductor in comparison with silver, copper, or aluminium.
Resistance increases what happens to amperage?
yesAnswerNo! Resistance is determined by the length, cross-sectional area, and resistivity of a conductor. Resistivity is, in turn, affected by temperature -so temperature indirectly affects resistance.These are the only factors that affect resistance. Voltage and current have no direct effect whatsoever on resistance. Current can affect resistance indirectly if it causes the conductor's temperature to increase.For AC circuits, 'skin effect', due to frequency, causes the current to flow towards the surface of a conductor which acts to reduce the effective cross-sectional area of that conductor. So, frequency can also indirectly affect resistance.
Is the resistance in the start winding greater or less than the resistance in the run winding?
The resistance in the start winding is greater because it is longer and thinner and has the greatest resistance to current flow
Is it true that for the same resistance the greater the voltage the greater the current?
true
How is resistance effected by frequency?
Resistance isn't directly affected by frequency -rather, it depends upon the cross-sectional area, length, and resistivity of a conductor.Having said that, at higher frequencies, current tends to flow towards the surface of a conductor. This is called skin effect, and acts to reduce the effective cross-sectional area of a conductor -resulting in the resistance of that conductor rising somewhat. The higher the frequency, the greater the skin effect, and the higher the resistance.This higher resistance to the flow of AC current is termed AC resistance, and shouldn't be confused with a circuit's reactance which is something entirely different.Additional answer:The skin depth is that distance below the surface of a conductor where the current density has diminished to 1/e of its value at the surface.
Do conductors have high or low current?
Low resistance. Think of Ohm's law. Voltage drop is directly proportional to resistance. The higher the resistance, the higher the voltage drop, and the less voltage that is available for the load. Think of conductor resistance as a resistance in series with the load. Also, higher conductor resistance means more power lost, going to heating the conductors. The "line loss" formula is P=I2R. The greater the resistance, the greater the electrical power being converted into thermal power heating the conductors.
What is skin effect?
<center> # 2 If the conductor is composed of one or more concentric circular elements, then the center portion of the conductor will be enveloped by a greater magnetic flux than those on the outside. Consequently the self induced back-emf will be greater towards the center of the conductor, thus causing the current density to be less at the center than the conductor surface. This extra concentration at the surface is known as skin effect, and results in an increase in the effective resistance of the conductor.
What does break resistance means?
Resistivity is the ability of any metal or conductor to resist the flow of current depending on the diameter of the conductor.Electric fuse is an alloy with low resistivity and breaks when the resistance is high.This is the point of break resistance. Literary meaning of break resistance would be an act of greater force to break any opposing force as a breakthrough the defence.
What happen to the current when the voltage is greater than or equal to 6 volts?
The current is greater than or equal to (6) divided by (the effective resistance of the circuit).
