Purchase Solution

Instrument and Measurement question

Not what you're looking for?

Ask Custom Question

The resistance of a resistor is to be determined by measuring the voltage drop across it when passing a given current, as shown in the figure in the attachment. The instrument indications are 2 mA and 12.0 V, the ammeter having a resistance of 10 Ω and the voltmeter a resistance of 10kΩ.

Calculate:
(a) the resistance of the resistor as indicated by the instrument readings;
(b) the correct resistance of the resistor allowing for instrument error;
(c) the percentage error of the uncorrected resistance with respect to the corrected resistance.

Attachments
Purchase this Solution
Solution Summary

The solution calculates the resistance of the resistor as indicated by the instrument readings, the correct resistance of the resistor allowing for instrument error, and the percentage error of the uncorrected resistance with respect to the corrected resistance.

Solution Preview

(a)
Considering the ideal ammeter and voltmeter, we would calculate the resistance of the resistor as indicated by the instrument readings as R = V/I (using Ohm's law), where

R = resistance of the resistor
V = voltage drop as indicated by the voltmeter = 12.0 V
I = current as indicated by the ammeter = 2mA = 2*10^-3 A

Which gives us

R = 12.0 / 2*10^-3
= 6*10^3 ohms or 6 k ...

Purchase this Solution
Free BrainMass Quizzes
Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Basic Physics

This quiz will test your knowledge about basic Physics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

View More Free Quizzes
Related BrainMass Solutions

  • Levels of Measurement and Social Work

    602232 Levels of Measurement and Social Work 1. List and discuss in detail the questions that must be asked when selecting a standardized measuring instrument. Provide a simple social work example. 2.

  • Marketing

    21430 Marketing How do you create data collection , measurement instrument, and data preparation design. The question wants you to give procedures for creating data collection designs, measurement instrument designs and data preparation designs.

  • Making Use of Ratio Measurement Data in Psychological Research

    Ratio measurement data means that the mesurement instrument is calibrated so that the "difference" between a measurement score of, say, 20 and 21 is the exact same as the difference between 80 and 81...namely 1 value point.

  • Reliable vs. Valid?

    This question can be answered by definition and example. Let's take a closer look.

  • Evaluation and Application of Attitude Instruments

    The reliability of survey attitude measurement: The influence of question and respondent attributes. Sociological Methods Research, 20(1), 139-181.

  • Context of use of variable: fear

    Definition doesn't work because it is a theory that has yet to be proven so it cannot be defined, especially without an instrument of research. Construct is also out because it is based on: what, why and what level?

  • FASB: Changes in Liabilities, Equity Measurement and Reporting

    new standards for fair value measurement and disclosures").

  • Define Measure Analyze Improve Control (DMAIC) - Measurement Phase

    What are some issues, concerns, and problems from the Measurement Phase.

  • BSIS: Validity, Reliability, Sampling

    In statistics reliability is a question of the consistency of measurement. If a test produces the consistent results under consistent conditions over time, then a test has reliability.

  • What type of research would be used

    Statistical methods in psychological research are highly dependent upon the reliability and validity of the measurement tool. Always keep in mind, that the statistical process is only as good as the strenght of your measurement instrument.

View More Related Solutions