Electric Cells
Physics · 50 practice questions
Simple voltaic cell and its defects; Daniel cell, Leclanché cell (wet and dry); lead-acid accumulator, Nickel-Iron, Lithium-ion and Mercury-cadmium cells; maintenance and arrangement of cells and batteries; efficiency of a cell.
- Identify the defects of the simple voltaic cell and their correction.
- Compare different types of cells including the solar cell.
- Compare the advantages of lead-acid and Nickel-Iron accumulators.
- Solve problems involving series and parallel combinations of cells.
Try a few questions
- Practice question 1
Lithium-ion batteries, widely used in modern portable electronics, offer a high energy density, meaning
- A.a very small amount of energy stored per unit mass, compared to older technologies
- B.a large amount of energy stored per unit mass, compared to older rechargeable technologies
- C.no measurable energy storage capacity at all
- D.an energy density identical to that of a simple lead-acid battery
Show the answer
B. a large amount of energy stored per unit mass, compared to older rechargeable technologies
Their high energy-per-mass ratio is precisely why lithium-ion batteries are favoured in compact, lightweight modern electronics.
- Practice question 2
Nickel-cadmium (NiCad) and nickel-iron (NiFe) cells are examples of
- A.rechargeable secondary cells
- B.non-rechargeable primary cells
- C.cells that generate no measurable e.m.f. at all
- D.purely theoretical cells with no practical application
Show the answer
A. rechargeable secondary cells
Both of these cell types can be recharged and reused repeatedly, classifying them as secondary cells.
- Practice question 3
Cells connected in parallel are used when a greater current-supplying capacity is required, while
- A.keeping the voltage the same as a single cell
- B.multiplying the voltage by the number of cells used
- C.reducing the voltage below that of a single cell
- D.eliminating the need for any defined voltage at all
Show the answer
A. keeping the voltage the same as a single cell
Parallel connection increases the available current capacity without changing the overall voltage, unlike a series arrangement.
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