प्रश्न 7
मध्यममौलिक प्रश्नWhich of the following is a base quantity in the SI system?
उत्तर और हल देखें
सहीसही नहींउत्तर C
सही उत्तर: C
हल
The SI system defines seven base quantities: length, mass, time, electric current, thermodynamic temperature, amount of substance and luminous intensity.
Luminous intensity is on that list, measured in candela.
Force, velocity and pressure are all derived: velocity is length over time, force is mass times acceleration, and pressure is force over area.
ध्यान देने योग्य
A quick test for a derived quantity is whether you can write its unit in terms of others — newtons, metres per second and pascals all decompose, candela does not.
- संकल्पना
- Base and derived quantities
- सामान्य समयसामान्य
- 50 से.
- आपका समयआपका
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