Sample
Summaries after sample
, Electrochemical cells How it works
• Contains chemicals that create electric • Chemical reaction occurs in the electrolyte.
current when in a closed circuit. • Reaction happens in electrolyte between positive
• Often incorrectly called a battery → a electrode and negative electrode.
battery = group of cells. • Electrolyte (which is contained in insulating
• Converts chemical potential energy casing) carries electric charge between
into electrical energy. electrodes.
• Used in torches, portable radios, circuit
boards. • Creates positive charge at the bump end and
negative charge at the flat end.
U3: Cells in an • Electric current flows only when the circuit is
Sample
Series and parallel batteries
electric circuit:
Electrochemical
cells
•
closed.
When chemicals are used up, the cell becomes
flat (no more power).
• Cells can be arranged in series or parallel.
Summaries after sample
Series battery:
• Positive pole of one cell connects to negative
pole of next cell.
• Adding more cells in series increases voltage.
• Voltage of cells is added to get total battery Parallel battery:
voltage. • Formed when all positive poles are connected and all negative poles are
• Example: 3 cells of 1,5 V each in series → battery connected together.
produces 4,5 V. • Voltage remains the same as a single cell (e.g., 3 × 1,5 V cells → 1,5 V).
• Adding more cells in parallel does not increase voltage.
• Advantage: battery lasts longer.
• More cells in parallel → longer battery life.
GR8 TECH T4-M6 Mind Map Spot On Copyright © www.summariessa.co.za (DO NOT COPY)
, Sample
Summaries after sample
Summaries after sample
, Electrochemical cells How it works
• Contains chemicals that create electric • Chemical reaction occurs in the electrolyte.
current when in a closed circuit. • Reaction happens in electrolyte between positive
• Often incorrectly called a battery → a electrode and negative electrode.
battery = group of cells. • Electrolyte (which is contained in insulating
• Converts chemical potential energy casing) carries electric charge between
into electrical energy. electrodes.
• Used in torches, portable radios, circuit
boards. • Creates positive charge at the bump end and
negative charge at the flat end.
U3: Cells in an • Electric current flows only when the circuit is
Sample
Series and parallel batteries
electric circuit:
Electrochemical
cells
•
closed.
When chemicals are used up, the cell becomes
flat (no more power).
• Cells can be arranged in series or parallel.
Summaries after sample
Series battery:
• Positive pole of one cell connects to negative
pole of next cell.
• Adding more cells in series increases voltage.
• Voltage of cells is added to get total battery Parallel battery:
voltage. • Formed when all positive poles are connected and all negative poles are
• Example: 3 cells of 1,5 V each in series → battery connected together.
produces 4,5 V. • Voltage remains the same as a single cell (e.g., 3 × 1,5 V cells → 1,5 V).
• Adding more cells in parallel does not increase voltage.
• Advantage: battery lasts longer.
• More cells in parallel → longer battery life.
GR8 TECH T4-M6 Mind Map Spot On Copyright © www.summariessa.co.za (DO NOT COPY)
, Sample
Summaries after sample
