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# Investigation of the Current &amp; Voltage characteristics of a Meyer Lamp

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Introduction

Investigation of the Current & Voltage characteristics of a Meyer Lamp

In this experiment I will be testing to see if the conductor (i.e. the Meyer Lamp) obeys Ohms Law.

Plan

In this experiment I will be observing the current-voltage relationship of a Meyer Lamp.

The apparatus that I will need are:

• Ammeter (multi-meter)
• Voltmeter (multi-meter)
• Variable Resistor
• Power Supply
• Wires to connect the circuit
• Meyer Lamp

In this experiment I have decided to increase the voltage of the Meyer Lamp at constant intervals of 1V. This will be done by using the variable resistor. Then I will measure the voltage across the circuit when there is a certain voltage flowing through the lamp. The observations will be recorded in a table and I will then plot a graph of current against voltage. According to Ohm’s Law, current and voltage

Middle Observations   I recorded my results in the table below.

 Voltage (V) Across Meyer Lamp Current (A)

Conclusion

According to the graph I can say that my experiment went reasonably well. However, not all the points lie in a perfect straight line. This may be because temperature was a factor that was hard to control in this experiment. The best we could do was to work at room temperature. The variable temperature did not produce any major anomalous results and so the error can be said to be very small.

The graph shows that as you increase the voltage the current also increases. I increased the voltage in the experiment by decreasing the resistance, therefore more current was allowed to flow through the circuit and so there was a greater potential difference between the Meyer Lamp.

As the experiment shows that there was a current-voltage relationship of the lamp, we can call the lamp an “Ohmic” material as V=IR.

Gurnam Singh Virdi

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics section.

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