Electronics Flashcards
What is the basic unit of electric current?
Ampere (A)
True or False: Voltage is the measure of electric potential difference.
True
Fill in the blank: The unit of resistance is ______.
Ohm
What is the formula for calculating electrical power?
Power (P) = Voltage (V) × Current (I)
What does a capacitor do?
Stores electrical energy.
Multiple choice: Which component is used to oppose the flow of current?
Resistor
True or False: A diode allows current to flow in both directions.
False
What does AC stand for?
Alternating Current
Fill in the blank: The symbol for a battery in circuit diagrams is ______.
Two parallel lines
What is the purpose of a fuse in an electrical circuit?
To protect against overcurrent.
Multiple choice: Which of the following is a semiconductor?
Silicon
True or False: Inductors store energy in a magnetic field.
True
What is the relationship between voltage, current, and resistance known as?
Ohm’s Law
Fill in the blank: The unit of capacitance is ______.
Farad
What type of circuit allows current to flow through multiple paths?
Parallel circuit
Multiple choice: Which device converts electrical energy into mechanical energy?
Motor
True or False: A potentiometer is a type of variable resistor.
True
What does DC stand for?
Direct Current
Fill in the blank: The frequency of AC is measured in ______.
Hertz (Hz)
What is a common use for a transistor?
Amplification or switching.
Multiple choice: What is the primary function of an oscilloscope?
To visualize electrical signals.
True or False: A transformer can increase or decrease voltage levels.
True
What is the main difference between series and parallel circuits?
In series, components are connected end-to-end; in parallel, they are connected across common points.
Fill in the blank: An LED emits ______ when current flows through it.
Light
What is the purpose of a circuit breaker?
To interrupt the flow of electricity in case of a fault.
Multiple choice: Which of the following components can be used to store electrical energy temporarily?
Capacitor
True or False: The higher the resistance in a circuit, the higher the current flow.
False
How does copper work
It’s highly electrically conductive. Electrons are loosely bound and freely move from one atom to another. Cover a copper wire in an insulating material (where electrons cannot move around). Makes for electrons going in and only being able to come out the other end.
In a conductor what causes electrons to move?
Electromotive force
What is the friction of the electrons going through a conductor, and what does it cause?
Resistance. Friction=resistance
Causes a loss of energy, which is apparent because it heats the wire.
What is one obvious things that can create electromotive force?
Battery
What does a battery do
Converts chemical energy into electrical energy
How does battery work
It creates electromotive force from one end to the other. That force can be used to make electons move
How does current flow
From positive to negative
