Make the idea your own
- 1With the field off, observe a straight beam.
- 2Give the upper plate a positive charge and compare electron and positive-ion paths.
- 3Reverse polarity. Use the new deflection as evidence about charge.
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Class 9 · Chemistry
Investigate a charged beam
Interactive explanation Gamified quiz, feedback & rewards
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NCERT chapter connection · Learning goals & preparation
By the end, you can…
- Explain Electric force = charge × electric field
- Change one input at a time and predict its effect before checking the model.
- Apply the relationship in a quiz and explain the reasoning behind your answer.
Useful preparation: Counting particles, ratios and the difference between a model and a real substance.
Exploration · Journey Inside the Atom
NCERT ePathshala current chapter index · checked 12 Nov 2026. This activity explores part of the chapter; it does not replace the textbook. Open official NCERT reference ↗
Hands-on explainer · Class 9
Investigate a charged beam
Class 9
CLASS 9 · CONCEPT QUEST
Turn understanding into a small adventureInvestigate a charged beam
Discover the rule, predict what happens, then solve a hands-on mission.
DiscoverFind the idea→PredictThink it through→BuildMake it click
3 rounds · no timer · up to 100 XP for your best result
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The relationshipElectric force = charge × electric field
Explain the experiment
When the goal is met: Electrons carry negative charge and are attracted towards the positive plate. Positive ions deflect the opposite way under the same field. Canal-ray composition depends on the gas.