Current, Voltage and Resistance are typical terms that are offered to describe electricity in circuits.
You are watching: What makes a light bulb non ohmic
Current is the lot of fee that passes with a allude in a conductor every second. The symbol for current is I and also the unit is amps (A).
Voltage (potential difference) is the work done to move a charge versus an electrical field in between two points. The symbol because that voltage is V and also the unit for voltage is volts (V)
Resistance is a measure of how piersonforcongress.complicated it is for existing to circulation through a material. The symbol for resistance is R and resistance is measure in ohms (Ω). There space several factors that effect the resistance of a conductor:Length – If the material has a much longer length, this will an outpiersonforcongress.come in a greater number the collisions with various other ions in ~ the conductor, raising the resistance and also making it harder for the existing to flow.Cross-sectional area – With a large cross-sectional area, over there is less chance the collisions and also the resistance will decrease.Temperature – greater temperatures will result in an boosted vibration of the ions, make the possibilities of electron colliding higher and the resistance will increase.
Ohm’s law describes the relationship in between current, voltage and also resistance:
= the voltage (in V)
= the present (in A)
= the resistance (in Ω).
Ohmic and also non-ohmic resistors:
Ohmic conductors follow Ohm’s law and have a constant resistance. The resistance the non-ohmic conductors varies for various voltages. Irradiate bulbs are an instance of a non-ohmic conductor. The resistance of light bulb boosts as the temperature of the filament increases.
See more: Land Between Two Rivers Is Called A Doab B Bhabar Class 11 Social Science Cbse
Ohmic and also non-ohmic conductors can be discover by plotting a graph of present vs voltage. The graph for an ohmic conductor is a straight line. The resistance can be found from the gradient that the graph. The existing vs voltage graph for a non-ohmic conductor is not a directly line.
What voltage will flow through a wire through a resistance of 1.5Ω to produce a present of 4A?
What is the resistance that a wire that produces a existing of 8A when a voltage the 2V is applied?