Question

part c - show your work (7 marks)

1. in a series circuit powered by a 120v battery, there is a resistor of 20 ohms. calculate the current. for full marks you must show all four steps of the calculation! (include units!) (4 marks)
2. draw a simple parallel circuit with 2 lamps, each controlled by its own switch, and a 6v battery. (3 marks)

Explanation:

Step1: Identify the formula

Ohm's Law formula \(I=\frac{V}{R}\) where \(V\) is voltage, \(R\) is resistance and \(I\) is current.

Step2: Substitute the values

Given \(V = 120V\) and \(R=20\Omega\). Substitute into the formula: \(I=\frac{120}{20}\).

Step3: Perform the division

\(120\div20 = 6\).

Step4: State the unit

The unit of current is Ampere (A).

Answer:

The current in the circuit is \(6A\).