SSI 3013: Information and Communication Technology in ScienceGroup members:Nor Fadilah Bt Zakaria D20101037413Nur Faralina Bt Asrab Ali D20101037415Syazana Bt Ismail D20101037417 Title : Data Logging (Ohm’s Law)
ENGAGE1) How energy is supply to a circuit ?2) What are the differences in current flow between series and parallel circuit?3) What will happen to resistance if the circuit is wire in series and parallel ?4) In what way does the series circuit reduce the resistance?5) How to build wire in parallel and series circuit?
Empower ObjectivesTo experimentally verify Ohm’s Law through measurementand to confirm findings by comparing measured values with prediction. Measuring Instrument Voltage/Current Sensor PASPORT Interface Crocodile clips 11.2 ohm Resistor Batteries (D Cells)
Procedure:1. Connect the PASPORT Interface to the USB port of the computer and plug the Voltage/Current Sensor into the PASPORT Interface.2. Construct a simple series circuit with the empty battery holder, long bulb in socket, and voltage/current sensor .3. You are now ready to begin collecting data.Data Collection Procedure:1. Make sure you have good connections at each junction in the circuit.2. Place one D cell in the battery holder; the bulb should light. If not, troubleshoot your circuit for a complete conducting path.3. Click Start and note the readings on the voltage and current digits displays.4. Record the voltage and current in the data table.
ENHANCEPrinciplesOhm’s Law can be written algebraically as V = IR , whereV represents the potential drop across the conductor(measured in volts), I the current in the conductor(measured in amperes), and R the resistance of theconductor measured in units called “ohms” (symbolizedby Ω, upper- case Greek omega)
How voltage, current, and resistance relate The current flowing through a resistor at a constant temperature is directly proportional to the voltage across the resistor. So, if you double the voltage, the current also doubles. This is called Ohms Law. The graph shows what happens to the current and voltage when a resistor follows Ohms Law.Relationship between current and voltagewhen a resistor follows Ohms Law
• Use in all electrical devices that need a continuous flow of electric current to function.• Batteries and generators provide the electricity and electrical circuits provide the paths along which the current flow.
• Flash light• Christmas tree light bulb• Train lighting• Voltage divider• Or any of electrical appliances….
• Kitchen appliances such as electric mixer and light dimmer switches operate by altering the current at the load by increasing or decreasing the resistance of the circuit.• The effect of the resistance in the circuit that affect the current.
MORAL VALUES FROM OHM’S LAW1. We known how to use electricity properly2. Become more creative and innovative person3. More appreciate the Ohm’s Law4. Ohms Law is the a foundation stone of electronics and electricity. Without the Ohm’s law, there will be no electricity at all.5. Allows us to enjoy the uses of our appliances now such as TV, refrigerator, Players, etc.
Advantages of Data Logging1. Better learning outcomes2. Presentation of data3. Appreciation of modern technology4. Increased level of interest among students.5. Data from the computer more accurate and precise.