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 brewsters experiment, Explain Brewster's experiment and describe ho...

Explain Brewster's experiment and describe how Brewster's law was formulated.

Define the procedure to determine flaw by transducer, Define the procedure ...

Define the procedure to determine flaw by transducer. Procedure to find flaw: Cross section of typical contact transducer Ultrasonic flaw detection is fundamentally

Like and unlike pararell forces, what is the difference between like and un...

what is the difference between like and unlike pararell forces?

Motion, #question. third law of motion.

#question. third law of motion.

Rotating biological contactor model, The topic for the project is to study ...

The topic for the project is to study and do calculation in Rotating Biological Contactor although you may choose a different title for your report. The aim is to research how the

Find the operating voltage of the coolidge tube, Q. The minimum wavelength ...

Q. The minimum wavelength of X-rays produced in a Coolidge tube is 0.05 nm. Find the operating voltage of the Coolidge tube. λmin = 12400 A 0 / V = 0.5 X 10 -10 m Theref

Determine the mass spectrograph, In the mass spectrograph, two positively c...

In the mass spectrograph, two positively charged ions having the similar velocity pass through a slit and enter a uniform magnetic field at right angles to their initial velocities

ELECTRIC FIELD, ELECTRIC FIELD ABOUT CYLINDERICAL SHELL OF CURVED SU...

ELECTRIC FIELD ABOUT CYLINDERICAL SHELL OF CURVED SURFACE

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