I don\'t understand the concepts behind currents in simple direct current circui

Question

I don't understand the concepts behind currents in simple direct current circuits. Attached is the pictures of the worksheet I need help on. Please give me detailed answers :) I am awarding 1500 points for this worksheet - it will help me out greatly! Thanks in advance.

Direct Current Circuits Which of the three circuits shown below, if any, are the same electrically? Which are different? Explain your answers. Consider the two messy circuit diagrams 1 and 2 below. Identify which of the nice neat circuit diagrams below (A, B, C, or D) corresponds to circuit 1. Explain the reasons for your answer. Which circuit diagram (A, B, C, or D) corresponds to circuit 2? Explain the reasons for your answer.

Explanation / Answer

1) All three are same since all three have the same points at same potential.

2a)1 is B since one bulb is connected to the positive battery terminal while 3 are connected to the negative battery terminal as is the case in 1.

b)2 is D since both the positive and negative terminals are connected to 2 bulbs each.

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