Fundamentals of Electricity and Electronics

What is Ohm's Law and how is it expressed mathematically?

• V = R / I

• Ohm's Law is expressed as V = I * R.

• I = V + R

• R = V - I

How do you calculate the total resistance in a series circuit?

• R_total = R1 - R2 - R3 - ... - Rn

• R_total = 1/(1/R1 + 1/R2 + 1/R3 + ... + 1/Rn)

• R_total = R1 * R2 * R3 * ... * Rn

• R_total = R1 + R2 + R3 + ... + Rn

What is the difference between series and parallel circuits?

• In series circuits, voltage is the same across all components; in parallel circuits, current is the same through all components.

• In series circuits, current is the same through all components; in parallel circuits, voltage is the same across all components.

• In series circuits, both current and voltage are the same across all components; in parallel circuits, they differ.

• In series circuits, components are connected in a loop; in parallel circuits, they are connected in a straight line.

Name three common components found in electronic circuits.

• microcontrollers

• diodes

• inductors

• resistors, capacitors, transistors

What is the function of a resistor in a circuit?

• To store electrical energy for later use.

• To increase the overall voltage in the circuit.

• To create a short circuit for faster current flow.

• The function of a resistor in a circuit is to limit current and control voltage.

How does voltage differ from current in an electrical circuit?

• Voltage is the potential difference; current is the flow of electric charge.

• Voltage measures resistance; current measures energy.

• Voltage and current are the same concept in an electrical circuit.

• Voltage is the flow of electric charge; current is the potential difference.

What is the unit of measurement for electrical current?

• watt

• ampere

• volt

• ohm

Explain the concept of electrical power and its formula.

• P = I^2R

• P = VI

• P = R/V

• P = V^2/R

What is the role of a capacitor in an electronic circuit?

• To convert AC to DC

• The role of a capacitor in an electronic circuit is to store and release electrical energy, filter signals, and smooth voltage fluctuations.

• To amplify electrical signals

• To act as a resistor in the circuit

Define digital systems and give an example.

• A computer is an example of a digital system.

• A smartphone is an example of a digital system.

• A television is an example of a digital system.

• A book is an example of a digital system.