Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 11

# If All Matters Were Made of Electrically Neutral Particles Such as Neutrons, - Physics

Short Note

If all matters were made of electrically neutral particles such as neutrons,
(a) there would be no force of friction
(b) there would be no tension in the string
(c) it would not be possible to sit on a chair
(d) the earth could not move around the sun.

#### Solution

(a) there would be no force of friction
(b) there would be no tension in the string
(c) it would not be possible to sit on a chair

For the existence of friction between two bodies and tension in a string, electromagnetic force is needed. Electromagnetic force exists only between charged particles. For sitting on a chair, we need fractional force. A neutral particle can exert gravitational force on other neutral particles. So, even if all the matters were made up of electrically neutral particles, the earth will still move around the sun.

Concept: Work Done by a Constant Force and a Variable Force
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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 1
Chapter 4 The Forces
MCQ | Q 4 | Page 62
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