to measure the effect of different distances in centimeters, on the intensity of light using a voltmeter on a clear light bulb using a photovoltaic cells to detect the intensity of the light at different distances. The voltmeter will provide the readings of the light intensity with the Voltage as the unit of light intensity. Hypothesis: I expect that the intensity of the light (measured by the voltmeter detected by the PVC) coming out of the light bulb to decrease as the distance in centimeter between
millimetre. The output variable will be the readings on the ammeter and voltmeters. The controlled variables will be the length of wire and the current being passed through the wire. The length of wire will stay the same and will already be measured to 50cm for us. The current will be kept on the same level using the same power pack. Apparatus Þ Power pack Þ Banjo board Þ Ammeter and Voltmeter Þ Wires Þ Bulb Þ Wires to connect the apparatus Þ Ruler Þ Crocodile
Voltage and Current Measurement Objective The objective of this experiment was to measure the Voltage and Current. Upon completion of this experiment I was able to: 1) Set the DC power supply to a specific voltage. 2) Properly connect the voltmeter to measure voltage. 3) Measure current with the ammeter. 4) Measure resistance with the ohmmeter. 5) Determine the accuracy of a given meter reading. Theory The theory required for this experiment was an understanding of Ohm’s
Establishing the Current-Voltage Relationship For a Metal Conductor Investigation- To Establish The Current- Voltage Relationship For A Metal Conductor. In this experiment I will be investigating the current- voltage relationship for a metal conductor. The variables that I need to keep constant in this experiment are: 1. Thickness of the wire. 2. Length of the wire 3. Input of voltage coming from the power supply should be kept constant. 4. Temperature of wire should be
result from each measurement. APPARATUS Meter stick mounted with wire 1 Ammeter 1 Voltmeter Wire 1 Variable resistor Crocodile clips METHOD 1. Attach the ammeter and the voltmeter to the meter stick and variable resistor. 2. Connect the variable resistor to the power supply and the meter stick. 3. Plug power supply into the mains and switch on. 4. Check that the voltmeter is showing positive. Length-cms Amps-I Volts-Potential Difference Resistance-Ohms
Varying the Voltage Across a Fixed Value Resistor For my project I am going to investigate the affects that occur when varying the voltage across a fixed value resistor. I will observe things that will happen. I will look at a variety of possibilities, and hopefully I will find out what happens when the voltage is changed. Planning ======== Things the voltage may effect when varied are: Current Heat Resistance I have decided to change the voltage and measure the current
Investigating the Resistance of a Wire The aim of this investigation is to see how the length of a wire affects its resistance. Background knowledge To make current flow through a conductor, there must be a potential difference (voltage) across it. As the current continues to flow there are certain factors which increase the resistance; Length of wire: as the length increases there will be a higher percentage of fixed atoms, therefore the electrons carrying the charge will collide
(V) in the circuit. Dependent Variable: The current strength (mA) in the circuit. Controlled Variable: The temperature in the circuit is kept constant throughout all tests. Apparatus: A circuit board. 6 Crocodile wires. A light bulb. An ammeter. A voltmeter. A rheostat resistor. Three 1,5V cells forming a 4.5V battery. Diagram: Method: Safety precautions: Ensure that the circuit is away from any water. Ensure that all apparatus being used is in working condition and has its certificate of safety
It is important that the voltmeter is set up in parallel and the ammeter in series. Battery[IMAGE]Circuit Diagram: I will work out from the readings of the voltmeter and ammeter the resistance in the circuit. This can be done using the formula: R=V/I Where R= Resistance, V= voltage, I= Current. This means I can find and record the resistance. This will work out the resistance in ohms. Equipment: * Power supply * Constantan Wire 1m * Voltmeter * Ammeter * Metre ruler
Apparatus: 1. Power Supply 2. Variable resistor 3. Ammeter 4. Voltmeter 5. Resistors 6. Electric wires Diagrams: ========= R1: R2: R1 + R2 (in series): R1 + R2 (in parallel): Method: 1. Set up the apparatus 4 times as shown in the diagrams above 2. Set the power supply to 6v 3. Set the variable resistor to maximum resistance 4. Switch on the power and note the ammeter and voltmeter readings 5. Reduce the resistance of the variable resistor 6. Repeat
Finding the Internal Resistance of a Power Pack Aim Design and Carry Out an experiment to determine the EMF and Internal Resistance of a standard laboratory power pack. Theory This information was taken from the Collins advanced science Physics textbook, the Cambridge Advance Science Physics 1 textbook and from notes taken in class. E.M.F or Electro Motive Force is the opposite of potential difference, in that; it is the situation where a voltage is gaining energy. This seems
Factors Which Affect the Resistance of a Wire To start off this experiment I feel that it is suitable to explain the main facts of this study. Below is a section explaining the resistance in detail. Facts on Resistance: I have shown how resistance occurs. · WIRE · ATOMS · ELECTRONS Resistance occurs when the electrons traveling along the wire collide with the atoms of the wire. These collisions slow down the flow of electrons causing resistance. Resistance is a
Building a Mass Balance to Measure Small Weights Using a Rotary Potentiometer Introduction: Nowadays, we have mass balances, weighing scales etc to measure masses but we hardly have devices that measure small masses. Sometimes, we may have to measure objects with small masses say 10g to 100g and my model is created backed up with this idea. Components Used: Digital multi-meter, Meter rule, Retort Stand, Clamp, Rotary potentiometer, Power supply (5V), Spring, Masses (in unit of 10g)
with out a power source the charge of the capacitor gradually leaves it, and is discharging. Method: In This experiment we charged a 1000μF capacitor and then discharged it using two circuits. We studied the capacitor charging by using a voltmeter in parallel and a 10kΩ resistor in series. Every 5 seconds the voltage was taking down, we then repeated this process but with the capacitor discharging. These were the circuits used: [IMAGE] And these were are results: time (s)
Investigating Resistance of a Wire The aim of this experiment is to find out how the resistance changes as the length of wire changes within the circuit changes. At the end of this investigation I will come to one of five possible conclusions which are: -the resistance increases as the length of wire increases, or -the resistance decreases as the length of wire increases, or -the resistance is constant as the length of wire changes, or -the resistance increases as the length of
Factors Affecting the Resistance of a Wire The aim of this experiment is to investigate one factor that affect the resistance of a wire. I will do this by performing an experiment. First I will need to identify the factors that effect resistance. There are a few factors that affect the resistance, it is determined by the properties an object has. This is know as resistivity. The factors I can investigate are : Ÿ Temperature Ÿ Length Ÿ Cross-sectional area/width Ÿ Material
the circuit. Plan Apparatus- Ammeter Thermistor Bunsen burner Tripod Clamp stand Clamp Gauze Thermometer Beaker Water Power pack Wires Crocodile clips Voltmeter I will set up the equipment as shown in the diagram. I will fill the beaker with water of room temperature. I will light the Bunsen burner and when the temperature reaches 250C will read the current through the thermistor and
Electrical Resistance Electrical resistance is a property of an electrical circuit that opposes the flow of current. Resistance involves collisions of the current-carrying charged particles with fixed particles that make up the structure of the conductor. Resistance is often considered as localized in such devices as lamps, heaters and resistors in which it predominates, although it is a characteristic of every part of a circuit, including connecting wires and electric transmission lines
Apparatus * Piece of Elodea Canadensis * Bulb * Voltmeter * Test tube * Beaker * Box * Two electrical wires * Stopwatch * Thermometer Method I put a piece of Elodea Canadensis (pond weed) in a test tube and covered it with water. The test tube was then placed in a beaker with a thermometer so that the water stayed the same temperature, this was then placed in a cardboard box with a bulb attached to a voltmeter by the electrical wires so that I could concentrate
The Resistance of a Wire Introduction: In this piece of coursework, I have been finding out factors that affect the resistance of a wire. Firstly, I will explain how resistance works. Resistance is when electrons in a wire collide with atoms also in the wire. When the electrons and the atoms collide the electrons start to move slower, which then causes resistance. So, resistance is how hard it is to move electrons through a wire. Now, I am going to tell you what are the factors of wire