Salma Ahmed
English Lit. GCSE Student
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Relationship between the current and voltage.
- Words:
- 2926
- Submitted:
- Wed Jan 07 2004
Have a little read: ... Relationship between the current and voltage Aim: To investigate the relationship between Current and Voltage Scientific Knowledge The current and voltage of an electric circuit, is given by the formula V=IR. This is known as Ohms. Ohm's Law is only applicable, when the temperature of the resistor is kept constant. Therefore Ohms law is only applicable to Ohmic conductors. An example of Ohmic conductors are metals and alloys at constant temperatures. Anything that doesn't obey Ohms law, are know as non-Ohmic Conductors. Examples of these are Silicon, and Germanium. Resistance Ohmic Conductors Non-Ohmic Conductors Obey Ohms Law Don't obey Ohms Law Metals & Alloys Semi-Conductors Resistance Increases with temperature Resistance decreases with temperature At very low temperatures it becomes Since the resistance decreases with a Superconductor temperature, they are called thermistors Superconductors At very low temperatures, atoms hardly vibrate at all. Therefore the resistance is almost 0 Ohms, and the conductors are very good. These are Superconductors. The resistance of a component can also be
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