Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
17 Cards in this Set
- Front
- Back
|
Circuit measurement is used for what purpose
|
To determine the reason a circuit is not functioning properly
|
|
|
An in-circuit meter is used for what purpose
|
To monitor circuit operation
|
|
|
Out-of-circuit meters have what advantage over in-circuit meters
|
They can be used on more than one device
|
|
|
If the current through a conductor is decreased, what happens to the magnetic field around the conductor
|
It decreases
|
|
|
When the current through a conductor decreases, the compass needle will react in what manner
|
Point more to magnetic north
|
|
|
The d'Arsonval meter movement is based on what principle
|
Permanent-magnet moving coil
|
|
|
Current through a meter results in the pointer. In d'Arsonval meter movement, what force produces this deflection
|
The interaction of magnetic fields
|
|
|
The hairsprings in a d'Arsonval meter movement performs what function
|
They keep the pointer in the position of the last indication when current is removed
They aid the movement of the pointer when there is current through the meter They make electrical connections to the meter movement |
|
|
What device allows a d'Arsonval meter movement to measure ac by converting ac to pulsating dc
|
A rectifier
|
|
|
What is meant by the term "meter damping"
|
Smoothing the oscillations of the pointer
|
|
|
What is a method used to dampen a meter
|
Incorporate an airtight chamber containing a vane
|
|
|
A d'Arsonval meter movement reacts to what value of voltage
|
Average
|
|
|
What value of ac is indicated by a meter scale
|
Effective
|
|
|
What meter movement will measure either ac or dc without the use of a rectifier
|
Electrodynamic
|
|
|
What electrical property is reacted to by the electrodynamic, d'Arsonval, moving-vane, and thermocouple meter movements
|
Current
|
|
|
What electrical property is measured by an ammeter
|
Current
|
|
|
How are ammeters connected in an electrical circuit
|
In series with the load
|
