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