Podcast
Questions and Answers
What is required for electric current to flow through a conductor?
What is required for electric current to flow through a conductor?
- A single wire
- A weak current
- An open circuit
- A closed-loop circuit (correct)
Which of the following is considered a good conductor of electricity?
Which of the following is considered a good conductor of electricity?
- Glass
- Rubber
- Wood
- Aluminium (correct)
What happens when a material with good conductivity is tested using a conduction tester?
What happens when a material with good conductivity is tested using a conduction tester?
- The bulb does not glow
- The bulb glows (correct)
- The bulb flickers
- Nothing happens
Which of the following can be used to test the conductivity of materials if weak current is suspected?
Which of the following can be used to test the conductivity of materials if weak current is suspected?
How can a magnetic compass be utilized in testing conductivity?
How can a magnetic compass be utilized in testing conductivity?
Which of the following liquids is a poor conductor of electricity?
Which of the following liquids is a poor conductor of electricity?
What defines electrical conductivity in a material?
What defines electrical conductivity in a material?
Which of these materials is classified as a poor conductor?
Which of these materials is classified as a poor conductor?
What are the two types of electrodes in electrolysis?
What are the two types of electrodes in electrolysis?
Which term refers to ions that move towards the cathode during electrolysis?
Which term refers to ions that move towards the cathode during electrolysis?
What occurs at the anode during the electrolysis of water?
What occurs at the anode during the electrolysis of water?
What is the primary purpose of electroplating?
What is the primary purpose of electroplating?
Which of the following compounds can act as an electrolyte?
Which of the following compounds can act as an electrolyte?
What type of current is required for electrolysis to occur?
What type of current is required for electrolysis to occur?
During electrolysis, what is the process called when particles become electrically charged?
During electrolysis, what is the process called when particles become electrically charged?
What is produced at the cathode during the electrolysis of water?
What is produced at the cathode during the electrolysis of water?
Flashcards
Electric Current
Electric Current
The flow of electrons through a material.
Conductors
Conductors
Materials that allow electric current to flow easily through them.
Poor Conductors (Insulators)
Poor Conductors (Insulators)
Materials that resist the flow of electric current.
Electrical Conductivity
Electrical Conductivity
The ability of a material to conduct electricity.
Signup and view all the flashcards
Electric Circuit
Electric Circuit
A circuit is a closed loop path that allows electric current to flow. It consists of components like wires, batteries, switches, and bulbs.
Signup and view all the flashcards
Conduction Tester
Conduction Tester
A device used to test whether a substance is a good or poor conductor of electricity.
Signup and view all the flashcards
Solutions of Acids, Bases, and Salts
Solutions of Acids, Bases, and Salts
Solutions made by dissolving acids, bases, or salts in water. These liquids conduct electricity.
Signup and view all the flashcards
Conduction Tester using Magnetic Compass
Conduction Tester using Magnetic Compass
A device that utilizes a magnetic compass to detect the presence of electric current. When current flows through a wire, the compass needle deflects.
Signup and view all the flashcards
Electrodes
Electrodes
Metal rods or plates used in electrolysis, allowing current to flow into or out of the electrolyte.
Signup and view all the flashcards
Cathode
Cathode
The electrode connected to the negative terminal of a battery. It attracts positively charged ions.
Signup and view all the flashcards
Anode
Anode
The electrode connected to the positive terminal of a battery, attracting negatively charged ions.
Signup and view all the flashcards
Electrolyte
Electrolyte
A solution that conducts electricity due to the presence of ions, undergoing chemical changes during the process.
Signup and view all the flashcards
Ions
Ions
Charged atoms or molecules formed when electricity passes through a solution.
Signup and view all the flashcards
Cations
Cations
Positively charged ions. During electrolysis, cations move toward the negative cathode and get deposited.
Signup and view all the flashcards
Anions
Anions
Negatively charged ions. During electrolysis, anions move toward the positive anode and get deposited.
Signup and view all the flashcards
Electrolysis of water
Electrolysis of water
The process of using electric current to break down water into hydrogen and oxygen.
Signup and view all the flashcardsStudy Notes
Electric Current
- Defined as the flow of electrons
- Cannot flow on its own, needs a closed-loop path (circuit)
- Circuit components include wire, battery, switch, and bulb
- Produces chemical, heating, and magnetic effects
Electrical Conductivity
- Ability of a material to conduct electricity
- Materials classified as conductors, semiconductors, and poor conductors
- Solids: Some are good conductors (e.g., copper, steel, iron, aluminum)
- Solids: Some are poor conductors (e.g., wood, plastic, rubber, glass)
- Liquids: Some are good conductors (e.g., tap water, salt solutions, acids, bases, salts)
- Liquids: Some are poor conductors (e.g., distilled water, sugar solutions, kerosene, spirit)
Conduction Tester
- Device to determine if a substance is a good or poor conductor
- Method 1 (torch bulb):
- Connects cell and bulb by wires
- Other wires contact the material to test
- Good conductor: bulb glows
- Poor conductor: bulb does not glow
- Method 2 (LED):
- LED glows even with a weak current
- Method 3 (magnetic compass):
- Compass needle deflects with current flow (even weak current)
Electrolysis
- Electrodes: metal plates through which current flows
- Cathode: connected to the negative terminal (negatively charged)
- Anode: connected to the positive terminal (positively charged)
- Electrolyte: aqueous solution that conducts electricity while undergoing a chemical change (e.g., copper sulphate, tap water)
- Ions: charged particles formed when an electrolyte is in a solution. Cations are positively charged and move towards the cathode, anions are negatively charged and move towards the anode.
- Electrolysis of water splits water into hydrogen and oxygen gases.
Electroplating
- Process of depositing a layer of metal onto another material via electricity
- Example: Coating copper on an object, using copper sulphate solution
- Applications:
- Protecting metals from corrosion
- Enhancing appearance (shininess)
- Using cost-effective coatings for expensive metals (e.g., chromium on cheaper metal)
- Various industrial and consumer applications
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
