There are two bodies A and B. A has a positive charge whereas B has no charge. When A and B are connected by a metallic wire, in what direction will the electrons flow?

Electrons flow in random directions and will effectively move from A to B

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Electrons flow in random directions and will effectively move from B to A

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Electrons flow in random directions and will effectively stay in their initial position.

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Electrons won't move in any direction

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Solution

The correct option is B
Electrons flow in random directions and will effectively move from B to A

Current flows from high potential to low potential. Here, A has a positive charge, so, it is at high potential and B being neutral is at low potential as compared to A. Thus, the current flows from A to B. We know that electrons flow in the direction opposite to the direction of the current. Therefore, electrons flow from B to A.

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Q. Ram learned in high school that electric current is the flow of electrons. Ram’s teacher had also told him that at any temperature the electrons of any metal move very randomly with very high speeds (around 100km/second). So Ram imagines that when a current flows through a conductor, this random motion must cease and all electrons move in one particular direction like a marching army (flow in a sense)

Q. A positively charged metal sphere P is connected to a neutral metal sphere Q.

Choose the correct statements.
(i) Electrons will flow from Q to P.
(ii) Protons will flow from Q to P.
(iii) Electron flow will stop when both P and Q will be negatively charged.
(iv) Electron flow will stop when both P and Q acquire the same charges.

Current in a circuit flows :

(a) in the direction from high potential to low potential

(b) in the direction from low potential to high potential

(d) in any direction.

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