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प्रश्न
One mole of a substance contains _______ atoms or molecules.
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उत्तर
One mole of a substance contains 6.023 x 10+23 atoms or molecules.
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संबंधित प्रश्न
Electric current is a ______ quantity
The solid angle is measured in _______.
Amount of substance gives the number of particles present in a substance.
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 |
Consider the statement given below and choose the correct option
Assertion: Electric current, amount of substance, luminous intensity are the fundamental physical quantities.
Reason: They are independent of each other.
Consider the statement given below and choose the correct option.
Assertion: Radian is the unit of solid angle.
Reason: One radian is the angle subtended at the center of a circle by an arc of length equal to its radius.
Give the name of the instrument used for the measurement of temperature.
What are the differences between plane angle and solid angle?
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`
Mention the SI unit of luminous flux.
