ELECTRICITY-02A_Electrical Components

Draw a circuit diagram to show how he should connect the apparatus.

State the relationship between voltage, current, and resistance.

(a)  

Calculate the resistance of the lamp when the voltage is 6.0 V. Give the appropriate unit.

(a)  

The student reverses the battery connections and then repeats his measurements. On the axes below, sketch the graph that he would obtain. Part of the graph has been done for you.

Draw a circuit diagram to show how the components in the photograph are connected.

Which one is the independent variable of this investigation?

• the length of the wire

• the material of the wire

• the number of the battery

• the current measured

Which one of these variables is the dependent variable of the investigation?

• the current measured

• the length of the wire

• the number of the battery

• the material of the wire

For 100 cm wire, the resistance of wire is ... Ohm. Round your answer up to 1 decimal.

(a)  

From the datas, draw the graph.

The student replaces the filament lamp with a light emitting diode (LED). He notices that there is no current in the diode when the battery is reversed. He replaces the battery with an A.C. supply. Which graph shows how the current in diode varies with time?

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