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One volt of potential difference is defined as
A1 coulomb per joule
B1 ampere per ohm
C1 joule per coulomb
D1 joule per second
Answer & Solution
Correct answer: C. 1 joule per coulomb
1. Potential difference = work done per unit charge, V = W/Q.
2. So **1 volt = 1 joule / 1 coulomb** (energy given to each coulomb).
3. 1 J/s is the watt (power), not the volt.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch12 'Electricity', §12.2_
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