Non-linear resistors
A. Produce harmonic distortion
B. Follows Ohm’s law at low temperatures only
C. Result in non-uniform heating
D. None of the above
Answer: Option A
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Non-Linear Resistor
Non-linear resistors are those types of resistors where the electric current flowing through it changes with the exchange in applied voltage or temperature and does not change according to Ohm’s law. There are several types of non-linear resistors, but the most commonly used are mentioned below.
Thermistors
Thermistors are a type of variable resistor that notices the change in temperature. In other words, it is a 2 terminal device that is very sensitive to temperature. The resistance of a thermistor is inversely proportional to the temperature.
Varistor Resistors
A varistor is a non-linear resistor made of semiconductor and current through which depends non-linearly on the applied voltage across it. MOV or metal oxide varistor is the most commonly used form of varistor resistors.
Photo Resistor or LDR (Light Dependent Resistors)
Photo Resistor or LDR (Light Dependent Resistors) or Photo Conductive Cell is a light-controlled variable resistor. The photo resistor resistance decreases with increase in incident light intensity.
Surface Mount Resistors
Surface Mount Resistors also called SMD resistor are rectangular in shape. An SMD is an electronic component that is made to use with SMT or Surface Mount Technology.