Explain working of ammeter, Electrical Engineering

Assignment Help:

Q. Explain working of Ammeter?

In order to measure the current through a wire or line of a circuit, an ammeter is connected in series with the line. A practical ammeter can usually be modeled as a series combination of an ideal ammeter and an internal resistance RI. The potential difference between the two terminals of an ideal ammeter is zero, which corresponds to zero internal resistance. There are what are known as dc ammeters and ac ammeters. An ac ammeter usually measures the rms value of the time-varying current. Note that for the ammeter to be inserted for measuring current, the circuit has to be broken, whereas for the voltmeter to be connected for measuring voltage, the circuit need not be disassembled.

Multimeters that measure multiple ranges of voltage and current are available in practice. Ohmmeters measure the dc resistance by the use of Ohm's law. A multimeter with scales for volts, ohms, and milliamperes is known as VOM. An ohmmeter should not be used to measure the resistance of an electronic component that might be damaged by the sensing current.


Related Discussions:- Explain working of ammeter

Biasing the bjt, Q. Biasing the BJT? A simple method of biasing the BJT...

Q. Biasing the BJT? A simple method of biasing the BJT is shown in Figure. While no general biasing procedure that will work in all cases can be outlined, a reasonable approach

Illustrates power dissipation management in embedded system, Illustrates ab...

Illustrates about the power dissipation management in embedded system? Power Dissipation Management a. Clever real-time programming through Wait and Stop instructions b.

Crossmagnetisation, what is crossmagnetisation in dc generator

what is crossmagnetisation in dc generator

Explain electric flux density, Electric flux density (D): Electric flux...

Electric flux density (D): Electric flux density is a measurement of electric flux that pass through a unit of plate's area with a coincide angle, that is an area of 1 meter 2

Sinusoidal analysis by using mesh equations and matlab, This example is con...

This example is concerned with steady-state sinusoidal analysis by using mesh equations and MATLAB. Let us consider the circuit shown in Figure and find the input impedance at the

How to reduce cost in embedded systems, Question: a) Give three ways h...

Question: a) Give three ways how to reduce cost in embedded systems. b) What is a microcontroller? How is it different to a microprocessor? c) Briefly comment on the "A

Signal processing 1 ., region of convergence of (Z+2)*(12z-1)/((3z-1)*(4z+1...

region of convergence of (Z+2)*(12z-1)/((3z-1)*(4z+1 ))

Tariff policy - electricity policies, National tariff policy: The Centr...

National tariff policy: The Central Government notified the National Tariff Policy on January 6, 2006, for the power sector in line along with the Section 3 of the EA, 2003. Wi

Determine harmonic factor hf of the input current, Q. Consider a full-wave ...

Q. Consider a full-wave single-phase bridge recti?er circuit with dc motor load, as shown in Figure (a). Let the transformer turns ratio be unity. Let the load be such that the

Increment contents of register - inr instruction , Increment contents of Re...

Increment contents of Register Content  of register  are   incremented  by one and the  results  is stored  in the same  register R. It is an exceptional  case in which  accumu

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd