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Quiz 4
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Q.1
Electricity flows well through "conductors." A good example of a conductor is ___________________.
metal
wood
Q.2
Electricity does not flow well through insulators. A good example of an insulator is _________________.
plastic
metal
Q.3
A material through which heats or electricity flows easily.
electric current
radiation
condutor
insulator
Q.4
A positive ion is an atom with more electrons than protons
TRUE
FALSE
Q.5
It is a reserve of chemical energy that can be transformed into electrical energ
battery
utilizer
wire
All of above
Q.6
Resistor
A flow of electricity through a conductor
a path through which electricity can flow
a device that can open or close a circuit
an object in an electrical circuit that resists the flow of energy
Q.7
A material that slows or stops the flow of energy, such as thermal energy, electricity and sound.
electric current
radiation
condutor
insulator
Q.8
Como son la cupla C y la velocidad V, cuanto un vehículo eléctrico esta usando freno regenerativo
+C y +V
-C y -V
-C y +V
-C y -V
Q.9
Un extractor presenta una cupla resistente similar a la funcion matematica:
y=axy=\frac{a}{x}y=xa
y=x+by=x+by=x+b
y=x2+cy=x^2+cy=x2+c
Ninguna de las anterisores
Q.10
Para calculo simplificado del tiempo de aceleración, si la cupla de aceleración es igual a: Cac=0.45(Car+Cmax)−0.5Cn NcNnCac=0.45\left(Car+C\max\right)-0.5Cn\ \frac{Nc}{Nn}Cac=0.45(Car+Cmax)−0.5Cn NnNc corresponde a
Cupla resistente Constante
Cupla resistente Lineal
Cupla resistente Parabolica
Ninguna de las anteriores
Q.11
Que motor es de tracción por excelencia
Motor síncrono
Motor shunt
Motor serie
Motor asíncrono
Q.12
La ecuación del momento de inercia equivalente rotacional es:
J=m(vw)2J=m\left(\frac{v}{w}\right)^2J=m(wv)2
J=m(vw)2+Jm+J1Z12+J2Z12Z22+...+JnZ12Z22...Zn2J=m\left(\frac{v}{w}\right)^2+Jm+\frac{J1}{Z1^2}+\frac{J2}{Z1^2Z2^2}+...+\frac{Jn}{Z1^2Z2^2...Zn^2}J=m(wv)2+Jm+Z12J1+Z12Z22J2+...+Z12Z22...Zn2Jn
J=Jm+J1Z12+J2Z12Z22+...+JnZ12Z22...Zn2J=Jm+\frac{J1}{Z1^2}+\frac{J2}{Z1^2Z2^2}+...+\frac{Jn}{Z1^2Z2^2...Zn^2}J=Jm+Z12J1+Z12Z22J2+...+Z12Z22...Zn2Jn
Ninguna de las anteriores
Q.13
The loss of an unbalanced electric charge is an
electric force
electric field
electric discharge
All of above
Q.14
Metals such as copper, iron, gold, and silver are ...
conductors
brittle
insulators
resistors
Q.15
When objects have equal numbers of positive and negative charges, they are
positively charged
negatively charged
electrically neutral
unbalanced
Q.16
Which of the following an insulator?
copper
wood
silver
salt water
Q.17
What parts of an atom are in the nucleus?
Protons
Neutrons
Electrons
Protons and Neutrons
Q.18
A metal spoon is an example of _____.
a conductor
an insulator
Q.19
The purpose of the power source is to push electrons through the electric circuit.
True
False
Q.20
Click any that are examples of power sources.
wall outlet
generator
battery
All of above
Q.21
An object that is positively charged contains more protons than electrons.
True
False
I need more information
All of above
Q.22
When a switch is closed, it will complete a circuit and allow electricity to flow.
True
False
Q.23
What object could a switch be compared to?
a fan blade
a roller coaster
a drawbridge
a belt buckle
Q.24
The purpose of a load is to change electrical energy to another type of energy that can be used by people.
True
False
Q.25
If an object has a net charge of +this means it has
lost 2 electrons
gained 2 electrons
lost 2 protons
gained 2 protons
Q.26
How many paths for the flow of electricity does a simple electric circuit have?
1
2
3
4
Q.27
How would the movement of electrons in electric current be described?
sit still
build up
jump
steady flow
Q.28
What is the path for the flow of electricity called?
circuit
charge
discharge
components
Q.29
What other word means component?
path
part
power
pop
Q.30
If a substance has an excess number of electrons on its surface, what type of charge does it have?
A negative charge
A positive charge
A neutral charge
A nuclear charge
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