Precision resistor, Physics

These are resistors with long term stability and close tolerances. These are used in measuring instruments. Wire wound resistors, produced with long term stabilities and with special techniques used to reduce inductive and capacitive effects are precision resistors. The wire used is of Cu-Ni or Ni-Cr alloy, with enamel coating or silk covered with vacuum impregnated varnish. End connecting wires are copper leads, with silver soldered to ends. Small bobbin is used to wind wire. It is covered with ceramic sieving. Due, to winding, these resistors have inductive effect. To reduce it, bifilar winding is used. The wire is bent back on itself at mid point, so that two halves are side by side separated by insulation only. If this loop has multiple layers, then the distributed capacitance is large. It is reduced by winding each bifilar loop on a separate section and connecting such sections in series.

 

 

Posted Date: 7/9/2012 5:42:11 AM | Location : United States







Related Discussions:- Precision resistor, Assignment Help, Ask Question on Precision resistor, Get Answer, Expert's Help, Precision resistor Discussions

Write discussion on Precision resistor
Your posts are moderated
Related Questions
Like the centre of mass, the moment of inertia is a function of a body that is concurrent to its mass distribution. Moment of inertia gives a measurement of the resistance of a bod

conditions of equilibrium for concurrent force system

Describe capacitance or capacity of a conductor and illustrate the principle of capacitor. Derive the mathematical equation for equivalent capacitance (Capacity) When a number o

Explain the Thermodynamics - Heat and Work Thermodynamics is an area of science which looks at how changes in energy, work and the flow of heat influence each other. It can exp

Question: Portray is a principal ray for the case of a concave lens. Where does it depart from here? Ans: In the situation of a diverging lens there is a ray that

A rigid tank primarily contains 3 kg of air at 500 kPa, 290 K. The tank is connected by a valve to a piston-cylinder assembly oriented vertically and consisting of 0.05 m³ of air i

why does rain water boils faster than fresh water

what is meant by body in physics

linear polarizers whose transmission axes make an angle of 45degree with each other,.The transmitted light intensity through both polarizers is what percentage of the incident inte

a balloon is filled with 100 kg of helium, and that the velocity is 2.0 m / s what is the external kinetic energy?