The electric volt is a measure of electrical potential. Identify which of the following can be defined as a volt.
Number of particles in motion
Opposition to electrical motion
Work per unit charge
Field strength per unit of force
Electrostatic discharge
A
Work per unit charge
B
Opposition to electrical motion
C
Number of particles in motion
D
Field strength per unit of force
E
Electrostatic discharge
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Solution
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eV is defined as the kinetic energy gained by a unit charge e when it is accelerated by a potential difference of 1 volt. As we know kinetic energy is the measure of work done, therefore, volt can be defined as work done per unit charge.
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