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

Evaluate the speed will the string break, Evaluate the speed will the strin...

Evaluate the speed will the string break A certain string just breaks when it is under400N of tension. A boy uses this string to whirl a 10-kgstone in a horizontal circle of rad

Is low attenuation is a sign of good quality fibers, Is low attenuation is ...

Is low attenuation is a sign of good quality fibers? Usually yes low attenuation is a sign of good quality fibers, but within lighting fiber optics the manufacturer's attenua

Volumetric coefficient of thermal expansion, In thermodynamics, the Joule-T...

In thermodynamics, the Joule-Thomson effect describes a process in which a fluid is forced through a valve or porous plug while kept insulated so that no heat is exchanged with the

Work and energy, if 2.13*106J of work must be done on a roller_coaster car ...

if 2.13*106J of work must be done on a roller_coaster car to move it 3.00*102m,how large is the net force acting on the car ?

Filter, what is resistor filter?

what is resistor filter?

Beer lambert''s law, what is meant by positive deviation of beer lambert''s...

what is meant by positive deviation of beer lambert''s low?

Evaluate the spring constant of the spring, A small ball with a mass of 60....

A small ball with a mass of 60.0 g is loaded into a spring gun, compressing the spring by 12.0 cm. When the trigger is pressed the ball emerges horizontally from the barrel ata hei

Electric spark, explain me about resistor in series

explain me about resistor in series

Explain chain reactor, Chain Reactor: Splitting of nuclei also causes t...

Chain Reactor: Splitting of nuclei also causes the emission of neutrons. If these neutron cause further fission in the other nuclei and this process continues, then it is known

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