Group members:

Nor Fadilah Bt Zakaria D20101037413

Nur Faralina Bt Asrab Ali D20101037415

Syazana Bt Ismail

D20101037417

Title : Data Logging (Ohm’s Law)

SSI 3013: Information and Communication Technology in Science

1) 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?

ENGAGE

EmpowerObjectives

To experimentally verify Ohm’s Law through measurement and to confirm findings by comparing

measured values with prediction.

Measuring Instrument

Voltage/Current Sensor PASPORT Interface

Crocodile clips11.2 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:

4. Make sure you have good connections at each junction in the circuit.

5. Place one D cell in the battery holder; the bulb should light. If not, troubleshoot your circuit for a complete conducting path.

6. Click Start and note the readings on the voltage and current digits displays.

7. Record the voltage and current in the data table.

Result

Part 1 Resistance = 11.2 ± 0.1 Ω

DataStudio Slope: 10.8 ± 0.59 Ω

Measured Values

Voltage (Volts) Current (Amps)

0.352 0.031

0.364 0.032

0.374 0.034

0.394 0.034

0.403 0.038

0.439 0.04

0.451 0.041

0.475 0.042

0.509 0.046

0.548 0.049

Interface

Example Experiment

ENHANCE

Principles

Ohm’s Law can be written algebraically as V = IR ,

where V represents the potential drop across the

conductor (measured in volts), I the current in the

conductor (measured in amperes), and R the

resistance of the conductor measured in units called

“ohms” (symbolized by Ω, upper- case Greek

omega)

How voltage, current, and resistance relate

Relationship between current and voltage when a resistor follows Ohm's Law

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 Ohm's Law. The graph shows

what happens to the current and

voltage when a resistor follows Ohm's

Law.

Applications

• 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.

Examples of Ohm’s Law application in daily life

• Flash light• Christmas tree light bulb• Train lighting • Voltage divider• Or any of electrical

appliances….

Eg : Electric mixer and Light Dimmer Switch

• 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 LAW

1. We known how to use electricity properly

2. Become more creative and innovative person

3. More appreciate the Ohm’s Law

4. 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 Logging

1. 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.