Why can a dc ammeter not read ac, Physics

Assignment Help:

Q. Why can a DC ammeter not read AC?

a) Dc ammeter can't measure ac because ac is changing continuously and periodically as well as a dc ammeter can just measure a constant current.

b) The usual moving coil dc ammeter is based on the torque generated on a current carrying loop in a magnetic field provided by a permanent magnet.

c) Ever since the current in an ac averages to zero it is changing too fast even at 60 Hz, the meter doesn't have time to respond to this because of the inertia of the coil. The average torques the coil experiences in a specified time interval is zero and hence there is no deflection.


Related Discussions:- Why can a dc ammeter not read ac

Drake equation, Drake equation (F. Drake; 1961) A technique of estimat...

Drake equation (F. Drake; 1961) A technique of estimating the number of intelligent, technological species (that means, able to communicate along with other species) in existe

Spectral lines , The spectral lines arising from the transition of electron...

The spectral lines arising from the transition of electron forms a spectra series.  Mainly there are five series and every series is named after it's discover as Lymen series, B

Capacitor-start-capacitor-run single-phase motor, Capacitor-start-capacitor...

Capacitor-start-capacitor-run single-phase motor : In this case, two capacitors are used one for preliminary and other for running purpose as shown. The capacitor used for prelimin

Explain the concept of prism, Prism is a transparent phase rounded by refra...

Prism is a transparent phase rounded by refracting surfaces, like the incident surface and emergent surface (from which light rays emerges) are plane and non parallel

If a single force acts on an object, Q. If a single force acts on an objec...

Q. If a single force acts on an object, the object accelerates. yse it is definately true. Newton's second law.

Application of physics in a technological context, Students are required to...

Students are required to prepare a one page mini-poster explanation of an application of Physics in a Technological, Biomedical, Biological or Engineering context. It is essential

What is friction forces, A block is considered on a rough horizontal surfac...

A block is considered on a rough horizontal surface. If we give a variable force F on the block and if we enhance the force F continuously then we seem that block remains stationar

Atoms And Nuclei, Prove that the various stationary orbit are not equally s...

Prove that the various stationary orbit are not equally spaced?

Laws of charges, What is the appropriate assignment for this particular top...

What is the appropriate assignment for this particular topic?

PHYSICAL CHEMISTRY, Calculate the density of sodium metal. The length of th...

Calculate the density of sodium metal. The length of the body-centered cubic unit cell is 4.24 A.

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