Advertisements
Advertisements
Question
Advertisements
Solution
(a) Primary cells cannot be charged again while secondary cells can be charged again and again.
(b) In primary cells, a chemical reaction is irreversible while in secondary cells, a chemical reaction is reversible.
APPEARS IN
RELATED QUESTIONS
State three factors on which the resistance of a wire depends. Explain how the resistance depends on the factors stated by you.
How is the resistance of a wire affected if its (a) length is doubled, (b) radius is doubled?
State and define the SI unit of electric current.
Calculate the total number of electrons flowing through a circuit in 20 mins and 40 s, if a current of 40 μA flows through the circuit.
[1 e– = 1.6 × 10-19 C]
4 × 1020 electrons flow through a circuit in 10 hours. Calculate magnitude of current. [1 e- = 1.6 × 10-19 C]
State two conditions necessary for a circuit, such that electric current flows through it.
A bulb is connected to a cell. How is the resistance of circuit affected if another identical bulb is connected (i) in series, (ii) in parallel, with the first bulb?
