- #1
mohau tshekoeng
- 7
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How to change an ohmic conductor to a non-omic conductor over a short period of time
How to manipulate Ohmic conductors
- Thread starter mohau tshekoeng
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In summary, the conversation discusses how to change the behavior of a conductor from ohmic to non-ohmic in a short period of time. This can be achieved by increasing the temperature of the conductor, using a transistor with or without base current, or by using an electric motor with a released shaft.
- #2
lychette
- 413
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Most metals show ohmic behaviour below about 1000C, raise the temperature and the behaviour is non - ohmic. Traditional filament light bulbs show non - ohmic behaviour, the resistance increases as the filament heats up at switch on.mohau tshekoeng said:
- #3
David Lewis
- 846
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The conductor can be the output of a transistor. Without base current, the conductor will be ohmic.
Close the switch and it will be non-ohmic.
Or, if the conductor is the armature of an electric motor, and the shaft is prevented from turning, it will be ohmic.
Release the shaft and it will be reactive.
Close the switch and it will be non-ohmic.
Or, if the conductor is the armature of an electric motor, and the shaft is prevented from turning, it will be ohmic.
Release the shaft and it will be reactive.
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FAQ: How to manipulate Ohmic conductors
What are Ohmic conductors?
Ohmic conductors are materials that have a linear relationship between the voltage applied and the current passing through them. In simpler terms, the resistance of these conductors remains constant regardless of the voltage applied.
How do I manipulate the resistance of Ohmic conductors?
The resistance of Ohmic conductors can be manipulated by changing the length, cross-sectional area, or temperature of the conductor. Increasing the length or decreasing the cross-sectional area will increase the resistance, while increasing the temperature will decrease the resistance.
Can I use different materials to make an Ohmic conductor?
Yes, any material that follows Ohm's law can be used to make an Ohmic conductor. This includes metals, such as copper and aluminum, as well as some non-metals, such as graphite and saltwater.
How can I measure the resistance of an Ohmic conductor?
The easiest way to measure the resistance of an Ohmic conductor is by using a multimeter. Simply connect the multimeter in series with the conductor and it will display the resistance in Ohms.
Is there a limit to how much I can manipulate the resistance of an Ohmic conductor?
Yes, there is a limit to how much the resistance of an Ohmic conductor can be manipulated. This is known as the material's resistivity, which is a characteristic property of the material and cannot be changed. However, within this limit, the resistance can be manipulated to a large extent by changing the length, cross-sectional area, and temperature of the conductor.