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16 Cards in this Set
- Front
- Back
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What device is made to operate on a small amount of current? |
Galvonometer |
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What is a common analog meter movement? |
d'Arsonval movement (DC) |
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What type of meter has a d'Arsonval movement? |
Moving-coil meters |
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What is the typical impedance of an ammeter? |
Less than 0.1 ohm |
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What is an ammeter shunt? |
A low resistance shunt used to conduct most of the circuit current away from the meter movement |
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How is an ammeter shunt connected? |
In Parallel |
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What is the average voltage drop of an ammeter shunt? |
50 millivolts |
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How are CT's designed to operate? |
With the secondary winding shorted |
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What induces voltage in a CT? |
Changing magnetic field produced by AC |
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What is induced voltage proportional to? |
The strength of the magnetic field |
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What do CT's depend on? |
Induction |
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Is the "Hall Effect" used to measure DC or AC? |
Both |
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What device is readjusted to zero when the scale is changed? |
Ohmmeter |
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True or False: Whether the magnetic field is moving or stationary, the Hall Generator produces a voltage in the presence of a magnetic field |
True |
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What is a device hat measures voltage during a period of time and produces a 2-dimensional image? |
Oscilloscope |
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What measures true power in circuit? |
Wattmeter |
