Home › ICSE Class 9 › physics › Current Electricity › Primary cells differ from secondary cells becaus…
Primary cells differ from secondary cells because primary cells
AUse sunlight to generate the current
BCan be recharged many times for re-use
CCannot be recharged after use
DUse radioactive materials inside them
Answer & Solution
Correct answer: C. Cannot be recharged after use
1. The chapter explains both kinds.
2. Primary cells use a one-way chemical reaction.
3. Once the chemicals are used up, the cell is discarded.
4. So option A is correct.
_Source: Selina Concise Physics Class 9, Ch 9 Current Electricity (Mistral OCR'd PDF), section on primary cells_
Related questions
For a battery of emf ε and internal resistance r driving current I through external resistA galvanometer of resistance G is converted into a voltmeter reading full-scale voltage V A galvanometer of resistance G shows full-scale deflection at current I_g. To convert it iThe relation between current density j, drift velocity v_d, number density n and charge e A wire has a resistance R. It is stretched uniformly so that its length becomes 2L. The neKirchhoff current law at a junction is a statement ofTwo cells of emf ε and internal resistance r each are connected in parallel. The equivalenA potentiometer of length L is used to compare emfs. If the balance lengths for cells of e