Ohmmeters, Physics

ohmmeters:

The use of ohmmeters is somewhat more involved. Most importantly when measuring resistance the circuit power must be switched off, power is derived from within the instrument. Secondly, great care must be taken to ensure there are no parallel paths that would affect the measurement. This is generally best confirmed by removing the component or device, or by disconnecting one end of it from the circuit concerned.

327_ohmmeter.png 
 Thirdly, it is essential that an analogue meter is zeroed before it is used.

To measure resistance, the meter is simply connected across the component or device to be measured. The polarity of the leads is not important unless semiconductor type devices are present. (this will be discussed in a later module).

When making resistance measurement, care must be taken to ensure the correct range is used. It is easy to mistake a low resistance value for a zero reading or short circuit.

 

 

 

Posted Date: 9/13/2012 2:24:54 AM | Location : United States







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

Write discussion on Ohmmeters
Your posts are moderated
Related Questions
The equation of an equipotential line in an electric field is y=2x then the electric field strength vector at (1,2) may be?

Disadvantages of D.C. Transmission of power 1. Electric power cannot be produced at high d.c. voltages because of  commutation problem. 2. The d.c. voltage cannot be stepped

How can light be defined in simplest form? The common explanation of 'light' (visible) is electromagnetic radiation visible to the human eye. It is only a little part of wha

The signal which has only two values. I.e. either a constant high value of voltage or zero value is known as digital voltage signal

derive an expression for density of states and hence deduce an expression for carrier concentration of metals

Q. What is ionisation potential energy? For hydrogen atom the energy necessary to remove an electron from first orbit to its outermost orbit (n=∞) is 13.6-0 = 13.6eV. This ene

How to find the acceleration of a body in a non inertial frame on the action of friction? Solution) Use the concept of pseudo force. Multiply  the mass of the body of which you

Explain Motion in 2 Dimensions When motion occurs in two dimensions, position, displacement and distance, speed, velocity and acceleration can be described using the x-y plane.


why does our image in the mirror not appear upside down