Q22. Three 2V cells are connected in series and used as battery in a circuit.
a) What is the p.d at the terminals of the battery?
b) How many joules of electric energy does 1C gain on passing through one cell and all the three cells?
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Answers
(1)Question :-
Three 2V cells are connected in series and used as battery in a circuit.
Answer :-
When three cells with 2 volts respectively are connected in series for the construction of the battery, then the total potential difference between the terminals of the battery will be 6V.
(2)Question :-
What is the p.d at the terminals of the battery?
Answer :-
[ For one cell :- ]
Given,
- Potential difference (V) = 2V
- Charge moved (Q) = 1C
We know that,
V = W/Q
[ Put the values ]
2 = W/1
W = 2 × 1
W = 2 J
Therefore,
Work done to move a charge of 1C with the potential difference of 2V is 2J.
(3)Question :-
How many joules of electric energy does 1C gain on passing through one cell and all the three cells?
Answer :-
[ For three cells :- ]
Given,
- Potential difference (V) = 6V
- Change moved (Q) = 1C
We know that,
V = W/Q
[ Put the values ]
6 = W/1
W = 6 × 1
W = 6 J
Therefore,
To move 1C charge with a potential difference of 6V, the work done is 6J.
Question:-
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Three 2V cells are connected in series and used as battery in a circuit.
a) What is the p.d at the terminals of the battery?
b) How many joules of electric energy does 1C gain on passing through one cell and all the three cells?
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Calculation:-
a) P.D [potential difference] at the terminals of the battery
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Now, Total Potential difference across three cells
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b)Electrical energy does it gain on passing 1C charge through one cell
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•For one cell ,P.D(V)=2V
•Electrical charge (Q)=1C
We know that
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•For three cells ,P.D,(V)=6V
We know that
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