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

Explain numeric processor 8087, Explain numeric processor 8087. Numeric...

Explain numeric processor 8087. Numeric processor 8087 is a coprocessor which has been intended to work under the control of the processor 8086 and offer it additional numeric

What is the mobile application development all about, In the previous two y...

In the previous two years, a lot of innovation has come in the mobile computing world. Apple has launched very imaginative mobile phone, iphone and ipad along with app store. Googl

Bode plot phase ad gain margin, Using Bode plot calculate (a) Phase margin ...

Using Bode plot calculate (a) Phase margin (b) Gain margin (c) Stability of closed loop system. The open transfer function of the system is t=30/(s+2)/(s+3)Using Bode plot calcula

Assignment question , An audio amplifier with feedback needs gain of approx...

An audio amplifier with feedback needs gain of approximately 500 in a 3-dB bandwidth extending from 60 Hz to 25 kHz. Assume this is accomplished using a feedback network with ß=0.0

Voltages source inverter - vsi, Voltages source inverter ( VSI) A volta...

Voltages source inverter ( VSI) A voltage  source  inverter is a constant voltage  source  which  is having  negligible  impedance. In these inverters the amplitude of output

Electromagnetic fields and waves, QUESTION: Electromagnetic Fields and Wave...

QUESTION: Electromagnetic Fields and Waves (a) Illustrate with help of diagrams the Cartesian, Cylindrical and Spherical coordinate systems. (b) Lay down the assumptions fo

Determine the signal to noise ratio, Your manager has requested you to revi...

Your manager has requested you to review current techniques for reducing, or eliminating, the effects of external interference upon electronic circuits. He requires a short report

Basic working principle of laser beam machining process, Define the basic w...

Define the basic working principle , process characteristics,advantages, disadvantages and application of Laser Beam Machining Process.

Working of an astable multivibrator, Q. With the help of a npn transistor c...

Q. With the help of a npn transistor circuit and wave forms explain the working of an astable multivibrator In astable multivibrator both transistors are coupled to each other

Power system, recent trends in power system

recent trends in power system

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