A person pushes a chair across the room. The chair has a mass of 30kg. The coefficient of friction between the chair and the floor is 0.55. What is the force required to move the chair?

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

real, smaller and upside-down.   so the answer should be b.

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