Ohm’s Law Experiment
Ohm’s Law Experiment shows that the electric current flowing through a conductor is directly proportional to the potential difference (voltage) applied across it, provided the temperature remains constant. In plain terms: if you double the voltage, the current doubles; if you halve the voltage, the current halves. This simple but powerful relationship is summed up by the formula V = I R, where V is voltage (in volts), I is current (in amperes), and R is resistance (in ohms).
When you graph voltage against current for a metallic conductor in a physics lab, you get a straight line through the origin—proof that V ∝ I. The slope of that line gives you the resistance R. Resistance itself depends on the material, length, and thickness of the wire: each component (like a torch bulb, a 10 W bulb, or a piece of nichrome wire) has its own constant ratio of V / I.
Class: This experiment is taught in Class 10 Science under the Electric Current chapter.
How Ohm’s Law Works – Ohm’s Law Experiment
- Definition: Ohm’s Law states that electric current through a conductor varies directly with the potential difference across it, if temperature is constant.
- Theory: In metallic conductors, current I increases linearly with voltage V. The V–I graph’s slope equals resistance R.
- Real Life Uses: Designing resistors for electronics, calculating power in appliances, and testing household devices.
- Observations:
- A torch bulb glows dimly due to high resistance.
- A 10 W bulb glows brightly because its resistance is lower.
- Nichrome wire heats up quickly as high current flows through its low resistance.
- A variable resistor lets you adjust current by changing its resistance.
Why Try Ohm’s Law Experiment in Dencity Virtual Lab
With the Dencity app, you can perform this virtual science lab experiment on Android, iOS, or Desktop—no physical setup needed!
- Cost efficiency: No need to buy bulbs, wires, or a science lab setup.
- Safety: Zero risk of electric shock or overheated components.
- Accuracy: Digital multimeter readings and precise voltage control.
- Interactive learning: Use sliders to adjust voltage and watch current change on live graphs.
Dencity for Teachers
Dencity promotes interactive teaching by giving educators tools to:
- Demonstrate the V–I graph live on interactive displays.
- Pause, rewind, and highlight key steps in the experiment.
- Assign in-app quizzes for instant feedback on science experiments.
- Monitor student progress with built-in analytics.
Dencity works exceptionally well on interactive touch panels in classrooms, turning every screen into a hands-on science app experience.
Educational institutions seeking customized pricing or a demo can contact us at contact@dencityapp.in or visit www.dencityapp.in/demo.
Frequently Asked Questions
- What is Ohm’s Law?
Ohm’s Law states that current through a conductor is directly proportional to the voltage across it, when temperature is constant. - What do V, I, and R stand for?
V is voltage (volts), I is current (amperes), and R is resistance (ohms). - Why is the V–I graph a straight line?
Because V divided by I is constant (that constant is resistance), so doubling V doubles I. - How does Dencity keep me safe?
Experiments run virtually, so there’s no real current to cause shocks or overheating. - Can I run this on my phone?
Yes—Dencity app is available on Android, iOS, and Desktop. - Is this experiment part of Class 9 Science?
It’s officially in Class 10 Science, but curious Class 9 students can explore its basics. - Are the virtual readings accurate?
Dencity’s digital instruments mimic real meters with high precision. - Can teachers change experiment settings?
Absolutely—set your own voltage ranges and resistance types to match lesson goals. - Does the app work offline?
Yes. Dencity caches experiment modules for offline use. - How do we get a school-wide license?
Email contact@dencityapp.in for customized pricing and a free demo.
