Unit of voltage is/are
a) volt
b) joules/coloumb
c) Nm/C
d) All the above
Correct Answer: Option D
Solution:
Voltage is nothing but how much Work-done is needed in moving a unit charge from infinity to a point against the influence of electric field.
Voltage = Work-done per unit charge$$V (t)=\frac {dW}{dq}$$
Unit:
- volt (V)
- Joules/Coloumb (since work-done per unit charge)
- Also, Work done = Force × distance, hence unit of voltage can be Nm/C (Newton - metre / Coloumb)
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