Electricity Unplugged: Exploring Circuits and Static Charge

Mr. Anderson discusses electricity, starting with static electricity and its effects, such as hair standing on end due to electron transfer. He explains the transition to electric circuits, which revolutionized technology. Using a water analogy, he describes how electricity flows in circuits, emphasizing the importance of a closed loop. The video covers circuit components like batteries, wires, resistors, and switches, and includes practice drawing circuit diagrams.

What is the origin of the word 'electricity'?

• It is derived from the Greek word for 'power'.

• It originates from the word 'amber'.

• It comes from the Latin word for 'lightning'.

• It is named after the scientist who discovered it.

What happens to your hair when you rub a balloon on it?

• It loses electrons and becomes positively charged.

• It gains electrons and becomes negatively charged.

• It gains protons and becomes positively charged.

• It loses protons and becomes negatively charged.

How did the advent of electric circuits revolutionize society?

• By reducing the cost of energy.

• By enabling the digital revolution.

• By making steam power obsolete.

• By eliminating the need for manual labor.

What analogy is used to explain how electricity works?

• Electricity is like the flow of sound.

• Electricity is like the flow of air.

• Electricity is like the flow of water.

• Electricity is like the flow of light.

What is the role of a battery in an electric circuit?

• To decrease the voltage.

• To act as a switch.

• To store and provide potential energy.

• To increase the resistance.

What symbol is used to represent a resistor in a circuit diagram?

• A triangle.

• A circle.

• A straight line.

• A zigzag line.

What does a closed switch in a circuit allow?

• It decreases the resistance.

• It allows electricity to flow.

• It stops electricity from flowing.

• It increases the voltage.

What is the function of a potentiometer in a circuit?

• To vary the resistance.

• To decrease the current.

• To act as a battery.

• To increase the voltage.

In a circuit diagram, what does an open loop indicate?

• A complete circuit with no resistance.

• A break in the circuit preventing electricity flow.

• A circuit with no voltage.

• A circuit with maximum current.

What happens to a light bulb in a circuit when the resistance is increased?

• The light bulb remains unchanged.

• The light bulb explodes.

• The light bulb gets dimmer.

• The light bulb gets brighter.