Class 9 · Chemistry

Investigate a charged beam

Interactive explanation Gamified quiz, feedback & rewards

0 XP0 mastered

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

Particle: 1 electron · 2 positive ion1Upper plate: −1 negative · 0 off · 1 positive0

The relationshipElectric force = charge × electric field

01 · How to explore

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.

02 · Take it further

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.