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Question
What are the differences between plane angle and solid angle?
Distinguish Between
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Solution
Difference between Plane Angle and Solid Angle:
- Plane Angle:
- The angle between the intersection of two lines or planes.
- It is two dimensional
- Unit is the radian.
- Solid Angle:
- The angle between the intersection of three or more planes at a common point.
- It is three-dimensional.
- Unit is steradian.
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Base Quantities and Units
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Chapter 1: Measurement - Exercises [Page 10]
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RELATED QUESTIONS
The coldness or hotness of a substance is expressed by _______.
_______ is used to measure electric current.
One mole of a substance contains _______ atoms or molecules.
Match the following.
| Temperature | Closeness to the actual value |
| Plane angle | Measure of hotness or coldness |
| Solid angle | Closeness to two or more measurements |
| Accuracy | Angle formed by the intersection of three or more planes |
| Precision | Angle formed by the intersection of two planes |
Name the three scales of temperature.
What do you mean by luminous intensity?
What is electric current?
Temperature is a measure of total ______ of the particles in a system.
Assertion: Radian is the angle subtended at the center of a circle by an arc whose length is equal to the radius of the circle.
Reason: 1 radian = `180/π`
What is the symbol for a unit of electric current?
