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

Diffrence in an induced and an electrostatic electric filed , Electrostatic...

Electrostatic field is caused by stationary charge, Induced field is caused by time-varying magnetic field

Explain about electric field, Explain about Electric Field Electric Fie...

Explain about Electric Field Electric Field:  Field formed by a single or group of charges that permeates all space.  Fields are responsible for making forces at a distance

Health , how do my boobs get so big ang why do i have hair down there

how do my boobs get so big ang why do i have hair down there

Find refractive index of water using newtons ring, Briefly explain with nec...

Briefly explain with necessary theory how you will calculate refractive index of water/transparent liquid by using Newton's ring apparatus?

Magnetomotive, A)   Wirte two materials that are magnetic and two that are ...

A)   Wirte two materials that are magnetic and two that are non-magnetic? B)  Explain magnetic induction C)  Describe what is meant by "Magnetomotive" force?

Compute the current through the resistor, A circuit contains of a 10 volt b...

A circuit contains of a 10 volt battery connected in series with a 4 ohm resistor and a 6 ohm resistor. A person computes the current through the 4 ohm resistor using Ohm's Law by

Experiment of cutting a glass dish from a used electric bulb, Cutting a gla...

Cutting a glass dish from a used electric bulb The hemispherical bottom of an electric light bulb gives a useful glass dish; a soldering iron can be used to cut it off. put the

Will a dc motor really produce voltage, Q. Will a DC motor really produce v...

Q. Will a DC motor really produce voltage if it is spun in reverse? Answer:- It will produce voltage if you spin it forwards too. The merely difference between a DC motor

Angular velocity, Three children are riding on the edge of a merry-go-round...

Three children are riding on the edge of a merry-go-round that is 100 kg, has a 1.60-m radius, and is spinning at 20.0 rpm. The children have masses of 22.0, 28.0, and 33.0 kg. If

What is frictional force, The substances which acquire charges on rubbing a...

The substances which acquire charges on rubbing are said to be charged. The electricity produced by friction is called Frictional force.  If the charges do not move, then the frict

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