what are non ohmic devices give an example?
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Examples of ohmic devices are : a wire, heating element or a resistor. The device that does not follow ohm's law is known as a non-ohmic device (i.e the resistance is different for different currents passing through it). Examples of non ohmic devices are: thermistors, crystal rectifiers, vacuum tube etc.
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Since the conventional diode has no negative differential resistance it will not be active and since it dissipates electrical energy it can be considered as a passive element.
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Low resistance ohmic contacts are used to allow charge to flow easily in both directions between the two conductors, without blocking due to rectification or excess power dissipation due to voltage thresholds.
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Components incapable of controlling current by means of another electrical signal are called passive devices. Resistors, capacitors, inductors, transformers, and even diodes are all considered passive devices.
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AC adapters are used with electrical devices that require power but do not contain internal components to derive the required voltage and power from mains power. The internal circuitry of an external power supply is very similar to the design that would be used for a built-in or internal supply.
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['Microcontroller.', 'Transformer.', 'Battery.', 'Fuse.', 'Relays.', 'Switches.', 'Motors.', 'Circuit Breakers.']
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Non-Ohmic Devices If a device behaves in a way that is NOT described by Ohm's law, (i.e. the resistance is not constant, but changes in a way that depends on the voltage across it.) The device is said to be non-Ohmic. In this case V versus I graph is not a straight line, but has some curvy shape.
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In electronics linear devices are those whose VI characteristics is a straight line from the origin . ie., the change in voltage is directly proportional to the change in current. Non linear devices are those who's change in voltage is not proportional to the change in current.
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Electronic devices are comparatively smaller in size & helps to make our day to day life easy. But without electrical devices if electricity only doesn't pass then how electronics will work.
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A light bulb is a common example of a non-ohmic conductor. Nichrome wire is an ohmic conductor. ... In general non-ohmic conductors have plots of voltage against current that are curved, indicating that the resistance is not constant over all values of voltage and current.
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Examples of non-volatile memory include flash memory, read-only memory (ROM), ferroelectric RAM, most types of magnetic computer storage devices (e.g. hard disk drives, floppy disks, and magnetic tape), optical discs, and early computer storage methods such as paper tape and punched cards.
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Most smartphones, tablets, and other gadgets are dual-voltage, and if you use a converter on something that is already dual-voltage, you can damage your device.
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If you need a high-power non-inductive resistor, you can use cermet (ceramic-metal mix) or metal oxide resistors. These are constructed much like a carbon comp resistor, substituting the cermet or metal oxide for the carbon composition material. There are many different types of adjustable resistors.
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An example of a convection current is a cloud bearing free electrons that moves through the atmosphere driven by wind. Conduction current consists of charged particles moving in response to the electric field and not merely being carried by motion of the surrounding material.
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INDUCTIVE RESISTOR: Any circuit in which change in current is accompanied by change in flux and therefore by induced emf is said to be inductive. ... Hence no emf is induced in coil and coil has zero inductance. A non-inductive resistor can be used to replace an inductive resistor, but that might not be a realistic goal.
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['Type.', 'Voltage.', 'Discharge curve.', 'Capacity.', 'Energy density.', 'Specific energy density.', 'Power density.', 'Temperature dependence.']
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Non-Ohmic “devices” are the devices which do not obey ohm's law. Ohm's law states that the potential difference across the ends of a conductor is directly proportional to the current flowing through the conductor.