Question

science 2 t2 lesson 11 homework - thursday 02 july, 2026

1. define what is a parallel circuit

1. define what is a series circuit

1. 1 electron has a very small amount of charge, so we combine a lot of it together to form a bigger unit and this unit is called coulomb, and the symbol for electrical charge is q. 1 c of electrical charge contains 6.2 \times 10^{18} of electrons.

1. write down the equation of current and use it to help you define what is current.

1. complete the table

\

$$\begin{tabular}{|c|c|c|} \\hline charge (c) & time (s) & current (a) \\\\ \\hline 1 & 2 & 0.5 \\\\ \\hline 12 & 3 & 4 \\\\ \\hline 6 & 1.2 & 5 \\\\ \\hline 100 & 10 & 10 \\\\ \\hline 30 & 60 & 0.5 \\\\ \\hline 100 & 50 & 2 \\\\ \\hline 20 & 5 & 4 \\\\ \\hline 180 & 120 & 1.5 \\\\ \\hline 60 & 20 & 3 \\\\ \\hline \\end{tabular}$$

1. the unit for current is ampere or coulomb per second.

1. in a series circuit current is the same everywhere; in a parallel circuit current splits.

1. the current going through a lamp is 5a. use the definition of current to explain what does this mean?

1. if the current coming out a battery is 2 a, calculate how much charge will come out of the battery in 1 hour.

1. describe what is a short circuit and why it is dangerous.

1. the current in the battery is 4 a. the two light bulbs are identical. calculate a1, a2, a3 and a4.

Explanation:

Step1: Identify total circuit current

The total current leaving and returning to the battery is \(4\text{ A}\).

Step2: Determine current at \(A_1\) and \(A_4\)

Ammeters \(A_1\) and \(A_4\) measure the total current in the main branch:

$$A_1 = A_4 = 4\text{ A}$$

Step3: Determine current in parallel branches

The current splits equally between two identical parallel light bulbs:

$$A_2 = A_3 = \frac{4\text{ A}}{2} = 2\text{ A}$$

Answer:

\(A_1 = 4\text{ A}\), \(A_2 = 2\text{ A}\), \(A_3 = 2\text{ A}\), \(A_4 = 4\text{ A}\)