# What is an ohmic conductor?

ohmic conductors are those which obey ohm's law

### What happens to resistance if current decreases?

It depends on whether the material is ohmic or non-ohmic. If it is ohmic, then it will obey Ohm's Law, and its resistance will remain constant if the current decreases. If, on the other hand, it is non-ohmic, it will not obey Ohm's Law and, if the temperature of the conductor falls (assuming it is a metallic conductor) due to the fall in current, then its resistance will fall too.

### Why is the graph of the non-ohmic conductor is curved in nature?

Ohmic (or 'linear') materials obey Ohm's Law. That is, their ratio of voltage to current remains constant for variations in voltage. Ohmic materials, therefore, produce a straight line graph when we plot current against variations in voltage; Non-ohmic (or 'non-linear') materials do not obey Ohm's Law. That is, their ratio of voltage to current varies for variations in voltage. This means that non-ohmic materials produce a curved line graph when we plot current against variations…

### Different types of conductors?

there are basically two types of conductors. ohmic or linear conductors, non ohmic or non linear conductors. ohmic conductors follow ohms law which is V=IR. In an ohmic conductor current changes linearly with voltage or potential difference across its ends. since the voltage- current characteristic graph is linear they are called linear conductors. in non ohmic conductors current still changes with potential difference but not linearly. it may vary exponentially. since the V vs I…

### Is a light bulb an ohmic conductor?

For a material to be 'ohmic' or 'linear', it must obey Ohm's Law. For Ohm's Law to apply, the ratio of voltage to resistance must be constant for variations in voltage. An incandescent lamp's filament is manufactured from tungsten, which is 'non-ohmic' or 'non-linear' because the ratio of voltage to current changes for variations in voltage. In fact, MOST conductors and electrical devices (such as diodes) are non-ohmic. If you were to conduct an experiment…

### What happens to the resistance as the length of a conductor decreases?

As the length of a conductor decreases so does the resistive value of the conductor. Conductors are rated in ohms per foot. To find the resistance of a conductor multiply the ohms/foot by the length of the conductor. As the ohmic value of the conductor increases so does the voltage drop on the conductor due to the resistance of the conductor. At a point the conductor has to be increased in circular size to bring…

### What is an ohmic resistor?

An ohmic resistor is a resistor that obeys Ohm's law, and a non-ohmic one dose not. All resistors resistance will begin to change as there temperature changes, and often we need a resistor with a steady resistance, thus some resistors, which we refer to as ohmic, will disperse the heat being generated and therefore it will keep a steady resistance. Resistors that do not disperse their heat will have varying resistances and therefore are non…

### When the voltage across the ends of a piece of wire is doubled what effect does this have on the current in the wire?

current doubles Answer It depends on whether the wire is ohmic or non-ohmic. If it is ohmic, then the current will also double. If, like tungsten, it is non-ohmic, then it depends.... because doubling the voltage will cause its resistance to increase. Ohmic materials obey Ohm's Law, whereas non-ohmic materials do not.

### What happens to the resistance of the circuit if the current through it is doubled?

lower resistance Answer It depends on the current levels involved. If doubling the current causes a substantial rise in temperature, then it is likely the conductor's resistance will increase (assuming it is a metal). This is because resistivity and, therefore, resistance of a metal increases with temperature. If doubling the current has no appreciable affect on temperature, then it depends. If the conductor is 'linear' or 'ohmic', then it will obey Ohm's Law, and there…

### Is Ohm's law a universal law?

No. It is more like a definition of resistance. As such, it is always true - but note that some devices have variable resistance (depending on the current, for example). Another Answer Ohm's Law states that 'the current flowing through a conductor at constant temperature is directly proportional to the potential difference across that conductor'. Ohm's Law is by no means a universal law, and only applies to those conductors or devices where the ratio…

### What observation about the current in a metal conductor was the basis for Ohm's law?

For Ohm's Law to apply to a conductor, the ratio of voltage to current must remain constant for changes in voltage. If the ratio changes when the applied voltage changes, then Ohm's Law does not apply. It's as simple as that! Conductors or devices to which Ohm's Law applies are termed 'linear' or 'ohmic'; those to which Ohm's Law does not apply are termed 'non-linear' or 'non-ohmic'. There are far more non-linear devices than linear…

### How do you know that the conductor used obeyed ohm's law?

A conductor obeys Ohm's Law if the ratio of voltage to current remains constant over a wide range of voltage variations -and, then, only over that particular range of voltages. Put another way, a graph plotted of current against voltage must be a straight line. If the ratio of voltage to current varies, or if the resulting graph is anything other than a straight line, then the conductor does not obey Ohm's Law. Ohm's Law…

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

An 'ohmic' resistor is one which obeys Ohm's Law. For Ohm's Law to apply, the resistance of a circuit must be constant over the range of incremental voltages applied to it. If the resistance changes over an incremental range of voltages, then it is said to be 'non-ohmic', and it does not obey Ohm's Law.

### How does temperature effect the resistance of a resistor?

as the temperature increase, the resistance tends to increase. However, there are two types to this: Ohmic and non-Ohmic Ohmic resistor's resistance increase with temp linearly whereas non-Ohmic would have a curve(e-function) Look at related question below for a full explanation on color banded resistors including temperature drift.

### Is non ohmic filament better than ohmic filament?

How can a filament give off heat without resistance? Another Answer The terms, 'ohmic' and 'non-ohmic' refer to whether or not a material obeys Ohm's Law. It has NOTHING to do with whether a filament is resistive or not! Ohmic materials obey Ohm's Law; non-ohmic materials do not. GSL incandescent lamps generally use a filament made of tungsten. If you were to apply a gradually-increasing voltage to that filament, and note the corresponding values of…

### Why the resistant in ohmic devices is constant and in non ohmic not constant?

the resistant in ohmic devices is constant because it depend on temperature ..and temperature is constant independent of polarity of potential difference...btin non ohmic the tempt increase with voltage which increase due to the heat increase beacue of power dispition....collision of electrons increases find more resistenc for passing so resistence increases

### What does the Ohm's law state?

Ohm's Law states that the current flowing in a conductor is directly proportional to the potential difference applied across that conductor, providing external conditions such as temperature remain constant. Another way of expressing it is to say that Ohm's Law applies whenever the ratio of voltage to current remains constant for variations in voltage. What Ohm's Law does NOT say is that 'current is voltage divided by resistance'! This is a misconception that many people…

### How does a heating pad work?

Heating pads contain heating elements that convert electricity to heat by passing current through a conductor (usually a wire). This process is variously referred to as resistive heating, ohmic heating, or Joule heating. The amount of heat generated is proportional to the square of the applied current multiplied by the resistance of the conductor. If SI units are employed (amperes for current and ohms for resistance) the unit of heat energyis called a joule.

### Is a light bulb an ohmic resistor?

The filament of a lamp is NOT an 'ohmic' resistor. It is, in fact, 'non-ohmic'. The term, 'ohmic' (or 'linear'), to those materials that obey Ohm's Law. Materials that do not obey Ohm's Law are called 'non-ohmic' (or 'non-linear'). For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage. This is not the case for tungsten, from which a lamp's filament is manufactured. As the voltage across…

### Does ohms law apply on transformer?

A: Ohms law apply to any and to all components if there is current flowing. Answer For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage. This is only true for a limited range of conductors and devices which are termed 'linear' or 'ohmic'. If the ratio of voltage to current changes for variations in voltage, then the conductor or device is 'non-linear' or 'non-ohmic', and Ohm's…

### Give you the examples of ohmic materials?

Metals like copper, silver, gold, iron, etc are examples of ohmic metals. Another Answer There are very few ohmic materials. Ohmic materials are those that obey Ohm's Law, and very few do -which might come as a surprise to many people (Ohm's Law is NOT universal law!)! For a material to obey Ohm's Law, the ratio of voltage to current must remain constant for variations in voltage. Because increasing current causes increasing temperature, the resistance…

### Can ohm's law be used to determine current or resistance in a current?

yeah of-course..... for DC circuit holds good...:) Another Answer You can use the ratio of voltage to current to determine the resistance of a conductor or other device for that particular ratio. But you must remember that Ohm's Law is not a universal law, and only applies to linear or ohmic devices.