Class 9 · Chemistry

Investigate a charged beam

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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 · తరగతి 9

Investigate a charged beam

తరగతి 9

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

సంబంధంElectric force = charge × electric field

Atomic evidence

భావనను అర్థం చేసుకోండి

an electron beam ను a positive-ion beam between oppositely charged plates. Switch the upper plate’s polarity and observe the deflection. This is a qualitative charge–force model inspired by discharge-tube experiments, not a reconstruction or a calibrated trajectory తో పోల్చండి.

గమనించండి

Particle: Electron (negative)
Upper plate: Field off
Deflection: Straight

మీ ప్రయోగం

పని చేసేలా చేయగలరా?

Deflect electrons towards a positively charged upper plate and run the beam to the screen.

నియంత్రణలను ఉపయోగించి మీ అమరికను తనిఖీ చేయండి.

01 · ఎలా అన్వేషించాలి

భావనను పూర్తిగా అర్థం చేసుకోండి

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 · మరింత తెలుసుకోండి

ప్రయోగాన్ని వివరించండి

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.