Sub-Atomic Particles
Chapter Name : Structure Of Atom |
Sub Topic Code : 102_11_02_01_02 |
Topic Name : Sub-Atomic Particles |
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Sub Topic Name : Charge To Mass Ratio Of An Electron |
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Introduction
Voltage fluctuations affect the picture quality on the television screen due to change in electric field.
Pre-Requisites:
Cathode ray discharge tube
Activity:
See what all factors affect the picture quality in a tv. Take a magnet close to television screen and observe.
Real Life Question:
“Why does the picture quality on the television screen worsen during voltage fluctuations?”
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| e/m | = 1.758820 × 1011 C kg–1 |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Make a table of properties that affect deviation | Read it time and again so that you can remember. |
Real life uses :
Magnetic field can nullify the effect of voltage fluctuation which disturb picture quality
Practical examples around us
| Examples | Explainations |
|---|---|
| Picture quality variations on a tv screen | Deviations are due to the effect of magnetic and electric field |
What you learn in Theory:
e/m ratio for an electron
What you learn in Practice:
What factors affect deviation due to electric and magnetic field ?