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What is the difference between ohmic and non ohmic elements?
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.
What happens to the resistance of a common ohmic resistor when it is heated?
When a common ohmic resistor is heated, its resistance typically increases.
Is a ceramic resistor ohmic?
yes
Is the 10 ohm resistor ohmic or non-ohmic?
If it has constant temperature (one can do this by dipping it in a beaker of water) it can be considered an ohmic conductor since Ohm's law states that the Voltage and amperage are directly proportional in a metallic conductor of constant temperature.
What is the difference between resistor and metrosil?
A resistor is a passive two-terminal electrical component used to introduce resistance in an electric circuit. Metrosil is a type of resistor that is specifically designed to protect electrical equipment from overvoltage and lightning strikes by rapidly switching to a high resistance state when a voltage surge is detected. Essentially, Metrosil is a specialized type of resistor with specific protective properties.
What is an example of an ohmic resistor?
i give the ans why iam asking you
What is the shape of the graph between volt and electric charge where Volt is the potential difference between the ends of an ohmic resisitor and electric charge is the current flowing through it?
-- If one axis of your graph represents the current flowing through the resistor, then label it "Current", not "Electric charge". There's a big difference between charge and current. -- Ideally, the current through an ohmic resistor is a linear function of the voltage across its ends, namely a direct proportion with the resistance being the constant of proportionality. -- Ideally, the graph is a straight line, with slope equal to the resistance in ohms, and y-intercept of zero. -- In reality, the resistor dissipates energy at the rate of (voltage) x (current) watts. It must warm up as a result, and the change in its temperature always has some effect on its ohmic resistance.
What is a nonohmic resistance?
A nonohmic resistance is a type of electrical component that does not follow Ohm's law, meaning that its current-voltage relationship is not linear. In nonohmic materials, the resistance can change with voltage, current, or temperature, resulting in varying resistance under different conditions. Examples include diodes, transistors, and certain types of thermistors. This behavior contrasts with ohmic resistors, which maintain a constant resistance regardless of the applied voltage or current.
Why is a light bulb not an ohmic resistor?
A light bulb is not an ohmic resistor because its resistance changes with temperature. As the filament heats up when current passes through it, its resistance increases, violating Ohm's law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points. In contrast, ohmic resistors maintain a constant resistance regardless of temperature or current. Thus, the relationship between voltage and current in a light bulb is nonlinear.
What resistor indicates plus and minus limits of ohmic value?
A resistor that indicates the plus and minus limits of ohmic value is typically marked with a tolerance percentage, such as ±5% or ±10%. This specification shows the allowable variation from the nominal resistance value. For example, a resistor labeled as 100 ohms with a ±5% tolerance can actually have a resistance value between 95 ohms and 105 ohms. This tolerance is crucial for ensuring that the resistor meets the required performance in a circuit.
Differentiate between ohmic and non ohmic substances?
which law follow non ohmic substances
Is LDR an ohmic conductor?
A Light Dependent Resistor (LDR) is not considered an ohmic conductor. Ohmic conductors follow Ohm's Law, where the current through the material is directly proportional to the voltage across it, resulting in a constant resistance. In contrast, the resistance of an LDR changes with varying light intensity, leading to a non-linear relationship between voltage and current. Thus, its behavior does not conform to ohmic characteristics.
