In a cell, the source of energy is
ASolar energy of the surroundings
BChemical energy of the electrolyte
CMechanical energy of an external load
DHeat energy taken from the surroundings
Answer & Solution
Correct answer: B. Chemical energy of the electrolyte
1. A cell has two electrodes in an electrolyte.
2. Chemical reactions at the electrodes drive a current.
3. Chemical energy converts into electrical energy.
4. So option A is correct.
_Source: Selina Concise Physics Class 9, Ch 9 Current Electricity (Mistral OCR'd PDF), section on cell_
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