• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Investigation of the Current & Voltage characteristics of a Meyer Lamp

Extracts from this document...

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

...read more.

Middle

image03.png

Observationsimage02.pngimage01.pngimage00.png

I recorded my results in the table below.

Voltage (V) Across Meyer Lamp

Current (A)

...read more.

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

...read more.

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

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Electrical & Thermal Physics essays

  1. Investigation into the resistance of a filament lamp.

    I done a preliminary experiment where a circuit was set up using all of the apparatus which would be included in the final experiment. We know that the filament lamp is 12V, the maximum potential difference of the bulb would be around 12V also the maximum temperature of the bulb

  2. Characteristics of Ohmic and non-Ohmic Conductors.

    When Voltage is doubled, Current increases too, but it is less that double. For eg. : When Voltage is 0.2 V, Current is 9.2 mA; When Voltage is 0.4 V, Current is 12.1 mA. (Instead of doubling to 18.4 mA)

  1. Investigate the current - voltage relationship for a resistor and filament lamp. To determine ...

    A resistance cannot be calculated because it is not constant. The graph for the fixed resistor produced a straight line. Which means the current - voltage relationship is proportional and it is an ohmic conductor. A resistance can be calculated because it is constant.

  2. The aim of my investigation is to determine the specific heat capacity of aluminium.

    There were no real anomalous results recorded. However experimental determinations of specific heat capacities usually involve some loss of heat to the surroundings by convection and conduction. There is also some loss of heat due to radiation, which is more significant at high temperatures; this can be reduced by using polished surfaces.

  1. Magnetism Investigation

    At no time during the experiment should the current be allowed to exceed 12 amps. 4. At the end of your measurements with weights in the pan, remove all weights from the pan, disconnect the circuit, and record the position of the laser spot on the scale.

  2. Practical Project (2863/02): The Characteristics of a Shunt Wound Motor

    The angular velocity is calculated by 2?f. The power is calculated from IV. And the efficiency is [(angular velocity * applied torque)/power]*100 Here are the results for my first set of readings: F0/N I/A F1/N F2/N F3/N F4/N f/Hz Angular Velocity/ rad/s Applied Torque/Nm Power Input/W Efficiency of Motor/% 2 1.49 3.2 0.5 1.0 3.1 16.7 104.9

  1. A2 Viscosity investigation

    As the temperature was probably lower than that stated I feel that the viscosities are probably lower than theses stated. The inaccuracies and how they could have affected the results are discussed below. Limitations and factors affecting the investigation: Various things will have affected this investigation and increased the errors and reduced the accuracy.

  2. Relationship between the current and voltage.

    Therefore, there is a difference in electrical potential energy between the negative and positive terminals of the battery. The potential difference, (p.d), or the voltage of the battery measures this energy difference. The greater the voltage of the battery, the more energy it can provide.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work