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Standard XII
Physics
Electric Current
Question

A metal conductor is connected to a battery. Which statement describes the current in the metal conductor?

A
It is a flow of electrons from the positive to the negative terminal
B
It is a flow of protons from the negative to the positive terminal
C
It is a flow of electrons from the negative to the positive terminal
D
It is a flow of protons from the positive to the negative terminal
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Solution
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Correct option is A. It is a flow of electrons from the negative to the positive terminal
When connected to a battery, the free electrons get accelerated due to the electric field (set up by the battery)and as the electron is negatively charged so it moves away from negative terminal to the positive terminal due to the electric field and they gain velocity and energy. However, the passage is not smooth and the electrons collide with the lattice ion in which the ultimate gainer (of energy) is the ion.

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