Explanation : These are many specifications
1. Resistance Specification : resistance is the specific key of resistor.
2. Power Dissipation Specification : when the current passes through the resistor then the power is dissipated and this shows itself in the form of heat.
The power dissipated is calculate by this formula
[tex]W = V\times I[/tex]
3. Power De - Rating Specification : when the component of resistor to run at high temperature then power de - rating starts. when the power dissipation will be quoted up to a given temperature then the de - rating applied.
4. Temperature Coefficient Specification : temperature coefficient is the parameter which is show the change in resistance with changing temperature.
5. Maximum Temperature specification : the resistor works at above certain temperature and under extreme condition the resistor will be damage.
that means when the temperature of the resistor extends then the value of the resistance will be permanently increase.
6. Resistor Specification For Maximum Voltage : Resistors are designed to operated above to a certain voltage and up to this voltage the resistor shows the possibility of breakdown.
The real value of voltage will depend on a variety of factor.