4915491
Descripción
Test por Joseph Whilden J, actualizado hace más de 1 año
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Creado por Joseph Whilden J
hace alrededor de 8 años
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Pregunta 1
Pregunta
The negatively charged particles in an atom are called:
Respuesta
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Ions
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Protons
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Neutrons
-
Electrons
Pregunta 2
Pregunta
The positively charged particles in an atom are called:
Respuesta
-
Ions
-
Protons
-
Neutrons
-
Electrons
Pregunta 3
Pregunta
the neutrally charged particles in an atom are called:
Respuesta
-
Ions
-
Protons
-
Neutrons
-
Electrons
Pregunta 4
Pregunta
Which of the following choices correctly reflects basic atomic particle placement in an atom?
Respuesta
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Protons in the nucleus with the neutrons and electrons in orbit
-
Neutrons and electrons in the nucleus with the protons in orbit
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Protons and neutrons in the nucleus with the electron in orbit
-
Protons and electrons in the nucleus with neutrons in orbit
Pregunta 5
Pregunta
An electrically unbalanced atom is called:
Respuesta
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An Ion
-
A proton
-
A neutron
-
An electron
Pregunta 6
Pregunta
Magnetism is defined as an invisible force with the ability to do:
Respuesta
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Electrical work
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Pneumatic work
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Mechanical work
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Forward and revers biases
Pregunta 7
Pregunta
Haphazard alignment of the individual molecules causes the effects of their magnetic poles to:
Respuesta
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Cancel out
-
Become stronger
-
Generate current
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Create a static charge
Pregunta 8
Pregunta
Magnetic lines of force never
Respuesta
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Repel; they attract
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Attract; they join
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Bend; they cross
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Cross; they bend
Pregunta 9
Pregunta
Which of the following substances is an insulator:
Respuesta
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Iron
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Gold
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Glass
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Silver
Pregunta 10
Pregunta
What is the unit of measurement for movement of electrons through a conductor?
Respuesta
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Volt
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Amp
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Watt
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Ohm
Pregunta 11
Pregunta
What does the term current refer to?
Respuesta
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Total resistance present in a circuit
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Amount of electrical pressure in the circuit
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Amount of power being transmitted through a conductor in 1 second
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Quantity of electrons flowing past a given point during 1 second
Pregunta 12
Pregunta
What is the unit of measurement for resistance to current flow?
Respuesta
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Volt
-
Watt
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Amp
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Ohm
Pregunta 13
Pregunta
What effect will increasing the current have on an electromagnet?
Respuesta
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Strengthens the magnetic field
-
Raises the temperature of the coefficient
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Lowers the temperature of the coefficient
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Raises the resistance offered by the conductor
Pregunta 14
Pregunta
Which component of a battery generates the negative charge during operation?
Respuesta
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Cathode
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Anode
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Diode
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Electrolyte
Pregunta 15
Pregunta
Which component of a battery generates the positive charge during operation?
Respuesta
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Cathode
-
Anode
-
Diode
-
Electrolyte
Pregunta 16
Pregunta
The flow of electrons in a battery is always from the:
Respuesta
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Cathode to the anode
-
Anode to the cathode
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Diode to the anode
-
Anode to the diode
Pregunta 17
Pregunta
If a conductor is passed through a magnetic field so that it will pass through the magnetic lines of force, it will generate:
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Electrical current
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Electrical resistance
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Magnetic resistance
-
Thermal coefficient changes
Pregunta 18
Pregunta
In a generator, the electrons in the conductor nearest the south pole will be drawn towards the side of the coil that is closest to the
Respuesta
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Magnetic dipole
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Source of current
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North pole of the magnetic field
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South pole of the magnetic field
Pregunta 19
Pregunta
Static charges tend to remain in the localized area of a contact for long periods in
Respuesta
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Resistors
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Insulators
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Capacitors
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Conductors
Pregunta 20
Pregunta
The conductivity of some insulating material is increased by the absorption of
Respuesta
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Air under low-humidity conditions
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Heat under high-humidity conditions
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Moisture under high-humidity conditions
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Moisture under low-humidy conditions
Pregunta 21
Pregunta
What electrical component is designed to offer a predetermined amount of opposition to current flow in a circuit?
Respuesta
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Filter
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Diode
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Capacitor
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Resistor
Pregunta 22
Pregunta
What is the most common type of resistor used in electronics?
Respuesta
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Mica
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Bakelite
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Wire-wound
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Carbon-composite
Pregunta 23
Pregunta
Wire-wound resistors are normally used in circuits where power requirements exceed:
Respuesta
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2 watts
-
3 watts
-
4 watts
-
5 watts
Pregunta 24
Pregunta
Wire-wound resistors are more accurate than carbon-composition resistors because of their
Respuesta
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Large size
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Extreme cost
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Large current carrying capacity
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Adjustable wire length capability during manufacture
Pregunta 25
Pregunta
A two-terminal variable resistor is a
Respuesta
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Rheostat
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Ananomiter
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Potentiometer
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Tapped resistor
Pregunta 26
Pregunta
A three-temrinal variable resistor is a
Respuesta
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Rheostat
-
Fixed resistor
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Potentiometer
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Tapped resistor
Pregunta 27
Pregunta
Insulators are substances with tightly bound orbiting electrons held firmly in place by the nucleus.
Respuesta
- True
- False
Pregunta 28
Pregunta
Select which of the following material that make good conductors:
Respuesta
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Platinum
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Plastic
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Gold
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Glass
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Silver
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Copper
Pregunta 29
Pregunta
Which substance has electrons bound loosely to the nucleus and easily freed by a suitable force?
Respuesta
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Conductor
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Insulator
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Electrical force
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Semi-conductor
Pregunta 30
Pregunta
Semi-Conductors are used in solid-state devices; their resistance and conductivity fall between insulators and conductors.
Respuesta
- True
- False
Pregunta 31
Pregunta
What is the unit of measure of electrical pressure?
Respuesta
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Amp
-
Current
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Volt
-
Ohm
Pregunta 32
Pregunta
Chemical batteries generally consist of three parts: an anode, cathode, and electrolyte.
Respuesta
- True
- False
Pregunta 33
Pregunta
When an object gains or loses a large amount of __________________, it develops a "static" charge.
Respuesta
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Electrons
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Ions
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Protons
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Neutrons
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