What are the four basic components required to build an electric circuit?

Four basic components of circuits.

• Source provides electric power.

• Conductor allows current flow.

• Load consumes the electrical energy.

An electric circuit is defined as a ___ path along which electrons flow from a voltage source.

Closed

True or False: An open circuit allows current to flow.

False. An open circuit has a break in the path, preventing current flow.

Riddle: I can be closed or open, but when I'm open, the light goes out. What am I?

A switch

What is the purpose of using circuit diagrams and standardized symbols in electrical engineering?

Circuit diagrams simplify electrical design.

• Use standard symbols for clarity.

• Facilitate communication among engineers.

• Help visualize complex circuits easily.

Fill in the blank: A ___ provides a pathway for current to flow in an electric circuit.

Conductor

What distinguishes a closed circuit from an open circuit?

A closed circuit has a complete path with no breaks, allowing current to flow, while an open circuit has a break that prevents current flow.

Which two main standards exist for circuit symbols in electrical engineering?

IEEE and IEC

True or False: A load in an electric circuit is responsible for generating power.

False. A load uses power from the source to operate, it does not generate power.

Riddle: I am essential for electricity to flow, but without me, the bulb stays off. What am I?

A closed circuit

What happens when a switch is opened in an electrical circuit?

Opening a switch creates an air gap, stopping current flow through the circuit.

Fill in the blank: The two electrodes of a cell are made of ___ and ___ materials.

Positive and negative

True or False: The potential difference across a cell’s terminals is the same whether the circuit is open or closed.

False. The potential difference, or electromotive force (emf), is only present when the circuit is open.

What is the role of chemicals in a cell when the circuit is closed?

The chemicals react, transferring energy through the movement of electrons between the electrodes.

Riddle: I push electrons out and pull them in, creating a flow that makes bulbs begin. What am I?

A battery or cell.

How does electric current flow in a circuit?

Electric current is the flow of many charges (electrons) moving in one direction through a conductor.

Fill in the blank: The chemicals in a cell store ___ energy, which is released when the circuit is closed.

Potential

What does the term 'electromotive force' (emf) refer to?

Electromotive force (emf) is the potential difference across a cell’s terminals when no current flows.

What occurs to current flow when a cell's chemicals are depleted?

When the chemicals are depleted, the current stops flowing.

What is the definition of potential difference (voltage) in an electrical circuit?

Potential difference (voltage) is the work done by a cell per coulomb of charge, or the energy each coulomb transfers to a component like a bulb.

Fill in the blank: The formula for calculating potential difference is ___ = W / Q.

V

True or False: A voltmeter is connected in series with a component to measure potential difference.

False. A voltmeter is connected in parallel with a component.

How does adding cells in series affect the brightness of a bulb in a circuit?

Adding cells in series increases the potential difference, making the bulb brighter and hotter.

Riddle: I measure the flow of charge, in amperes I do flow. Without me, circuits would be slow. What am I?

Current

What is the physical meaning of current in an electrical circuit?

Current (I) is the rate of flow of charge, measured in amperes (A), where 1 ampere equals 1 coulomb per second.