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

Explain two-stage rocket, Two Stage Rocket Suppose the motion of the tw...

Two Stage Rocket Suppose the motion of the two-stage rocket or the corresponding velocity-time graph below. The rocket has two successive fuel stages followed through a free-fa

Thin films, Surface crystallography and epitaxy. Fe thin films are grown o...

Surface crystallography and epitaxy. Fe thin films are grown on a single-crystal Al(100) substrate surface. The films grow with no dislocations (if they are thin enough) with sug

Newton''s law, how much force is necessary to stop the car when steps on a ...

how much force is necessary to stop the car when steps on a brake a 1000-kg car travelling at 65 km/h if the braking distance is 35 m?

Sketch a motion diagram, You may find parts of this question similar to the...

You may find parts of this question similar to the \Landing on an Alien World" activity that we did some time ago in class. Start by opening the \Maze Game" activity. You can find

Explain frame of reference, FRAME OF REFERENCE:  "A set of reference ax...

FRAME OF REFERENCE:  "A set of reference axis needed to locate the position of an object in space is known as a frame of reference"

Explain about the term intrinsic sensors, Explain about the term intrinsic ...

Explain about the term intrinsic sensors. Intrinsic sensors: Optical fibers can be utilized as sensors to measure temperature, strain, pressure and other quantities by chang

What is the band width?, A data transmission rate; the maximum amount of in...

A data transmission rate; the maximum amount of information (bits/second) that can be transmitted along a channel is called band width.

Find the period of rotation of the rod, The record for the highest speed ac...

The record for the highest speed achieved in laboratory for a uniformly rotating object was 2.01*10^3 m/s for a0.15-m long carbon rod. What was the period of rotation of the rod?

What is the means in which light waves travel, What is the means in which l...

What is the means in which light waves travel? Ans: Light is the only type of wave that doesn't require a medium. Confirmation that light will travel through vacuum is the

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