Quiz
Class 2 Midterm part 1
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Perguntas do quiz (15)
1
Frequency is measured in ____________.- AHertz
- BJoules
- CSeconds
- DCoulombs
2
A 0.1µH inductor is placed in series with a 2µH inductor. The total inductance is:- A2.1µH
- B1.9µH
- C0.95µH
- D. 0.2µH
3
Some relays can be operated (controlled) by AC current, and some only by DC.- AVerdadeiro
- BFalso
4If a switch is closed, that switch is:
- Azero Ohms
- Binfinite Ohms
- Cbreaking a path
- Doff
5
When current is flowing toward you (when electron flow is toward you) in a wire, the direction of the magnetic flux will be _______________.- A. toward you
- Bcounterclockwise
- Cclockwise
- Daway from you
6Galvanic isolation ____________.
- Ais commonly used in electrical power distribution.
- Bprevents unwanted currents in electrical systems.
- Cis an important electrical safety mechanism.
- DAll of the above
7If a switch is “OFF” the switch is:
- AOpen
- BZero Ohms
- CClosed
- Dmaking a path
8
For Sine waves, peak voltages and currents are equal to 0.636 times the R.M.S. value.- AVerdadeiro
- BFalso
9
An inductor opposes a change in _____.- Atemperature
- Bcurrent
- Cresistance
- Dvoltage
10
Unlike magnetic poles _______________ each other, while like magnetic poles _______________ each other.- Aattract, repel
- Brepel, attract
- Crepel, repel
- Dattract, attract
11Two 100µF Capacitors are placed in series. The equivalent capacitance is
- A200µF
- B50µF
- C400µF
- D100µF
12
Nonmagnetic materials are attracted by magnets.- AVerdadeiro
- BFalso
13
When the correct power is applied to a relay’s coil, the magnetic field produced causes the relay’s switch(s) to change state- AVerdadeiro
- BFalso
14
Relays and contactors perform completely different functions- AVerdadeiro
- BFalso
15
In an ideal 5:1 step-down transformer, the power in the secondary is:- Anot important.
- Bone fifth of the primary power.
- Cthe same as the primary power.
- Dfive times the primary power.
Informações
- Descrição
- Quiz sobre Class 2 Midterm part 1 , criado por Regino Callan em 30-11-2020.
- Autor
- Regino Callan
- Idioma
- English
- Visualizações
- 15
- Etiquetas
- Avaliação
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