The Secret of the Fan Regulator (Fan Regulator ka Raaz)
Class 9 · Science · Electricity: Ohm's law
About 11 minutes · taught by Arjun Bhaiya with Chintu the robot · Hinglish or English
Why did the old fan regulator at Nani's house get warm? Arjun Bhaiya uses that question to build up Ohm's law, V = I × R, for Class 9 and 10 Science.
Learners change the voltage and the resistance in a live circuit, watch an ammeter, and plot points on a graph to find the relationship themselves. A water-pipe picture explains voltage, current and resistance, with units (volt, ampere, ohm) and a worked example. The lesson also checks a common belief: that a resistor or regulator “eats up” current.
Arjun Bhaiya ke saath circuit mein voltage aur resistance badlo, graph banao, aur khud dhoondo ki V = I × R kyun sach hai.
What you do in this lesson
- Predict first, then test it in a live circuit simulation with a graph
- Spot Chintu’s mistake
- Number and explain-in-your-own-words questions, checked on the server, with hints
- A board-style recap card and one question for tomorrow
About the Classis.AI Tutor
- Characters: Meera Didi, Arjun Bhaiya and Chintu the robot. Each has one voice.
- Languages: English, Hindi and Hinglish.
- Classes: CBSE/NCERT-style Science and Maths for Class 9 and 10, plus lessons for Class 3–5 and adults.
- How a lesson works: predict, play with a live simulation, catch Chintu's mistake, then answer questions that are checked on the server, with hints.
- Price: 10 free doubts a day. Paid credit packs are coming soon. No subscription and no sales calls.
- Children's privacy: a parent agrees for anyone under 18. Progress is saved so the learner can continue; no learning profile, behaviour tracking or targeted ads for children.
More lessons
- Chintu's Torch (Chintu ki Torch) — Class 3–5, Science, about 7 minutes, with Meera Didi
- The Secret of the Fan Regulator (Fan Regulator ka Raaz) — Class 9, Science, about 11 minutes, with Arjun Bhaiya
- How Many Appliances, One Plug? (Kitne Appliance, Ek Plug?) — Adults, Everyday science, about 8 minutes, with Arjun Bhaiya