Electrical Fundamentals

What is the unit of electrical resistance?

• ohm

• volt

• watt

• ampere

What is the SI unit of electric current?

• C

• B

• D

• A

What is Ohm's law?

• Ohm's law is the relationship between voltage and current in a magnetic field

• Ohm's law states that resistance is directly proportional to voltage

• Ohm's law relates the voltage (V), current (I), and resistance (R) in a circuit: V = I * R

• Ohm's law only applies to AC circuits

What is the difference between AC and DC?

• The main difference between AC and DC is the direction in which the current flows.

• The main difference between AC and DC is the speed at which they travel

• AC and DC differ in the type of electrical outlets they use

• The difference between AC and DC is the color of the wires used

What is the function of a diode in an electrical circuit?

• To increase resistance in the circuit

• To store electrical energy in the circuit

• To regulate voltage in the circuit

• The function of a diode in an electrical circuit is to allow current to flow in one direction only.

What is the purpose of a transformer in an electrical system?

• To regulate the flow of current in a circuit

• To change the voltage level of an AC without changing the frequency.

• To store electrical energy

• To convert DC to AC power

What is the difference between series and parallel circuits?

• The difference between series and parallel circuits is purely theoretical and does not affect the actual behavior of the circuits

• In series circuits, the components are connected in a straight line, while in parallel circuits, the components are connected in a zigzag pattern

• Series circuits are only used for low voltage applications, while parallel circuits are used for high voltage applications

• The main difference between series and parallel circuits is how the components are connected and how the current and voltage behave in each type of circuit.

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

• The role of a capacitor in an electrical circuit is to decrease voltage fluctuations

• The role of a capacitor in an electrical circuit is to amplify DC current

• The role of a capacitor in an electrical circuit is to store and release electrical energy, block DC current, allow AC current to pass through, and smooth out voltage fluctuations.

• The role of a capacitor in an electrical circuit is to generate electrical energy

What is the concept of electrical power?

• The concept of electrical power is the ability of an electric circuit to store energy

• The concept of electrical power is the measurement of the resistance in an electric circuit

• The concept of electrical power is the rate at which electrical energy is transferred by an electric circuit, measured in watts (W). It is calculated by multiplying the voltage (V) by the current (I) flowing through the circuit.

• The concept of electrical power is the speed at which electricity travels through a circuit

What are the safety precautions to be followed while working with electrical equipment?

• Using metal tools near live wires

• Not wearing appropriate PPE

• Working with electrical equipment in wet conditions

• Some safety precautions to be followed while working with electrical equipment include wearing appropriate PPE, ensuring proper grounding, using insulated tools, and avoiding wet conditions.