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Science · 2025 · 3 marks
CBSE 2025 · Region 6 · Set 1 · Q33
(a) Explain the statement "Potential difference between two points is 1 volt". (b) What do the symbols given below represent in an electric circuit?…
(a)
Explain the statement "Potential difference between two points is $\displaystyle 1$ volt".
(b)
What do the symbols given below represent in an electric circuit ? Write one function of each.
(i)
(ii)
Marking-scheme solution
(a) It means $\displaystyle 1$ joule of work is done to move a charge of $\displaystyle 1$ coulomb from one point of the conductor to the other.
(b) (i)
Ammeter.
Ammeter is used to measure electric current
Rheostat or variable resistance
Rheostat is used in a circuit to vary the resistance of the circuit
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.