Question

Which among the following is NOT a fundamental SI unit?
1. candela
2. kelvin
3. tesla
4. ampere

Answer 1

Correct Answer - Option 3 : tesla

The Correct Answer is tesla.

• The tesla is a magnetic induction unit derived from the International System of Units. One tesla is equivalent to one weber per metre square.
• The device was announced at the 1960 General Conference on Weights and Measures and, on the suggestion of the Slovenian electrical engineer France Avčin, is named in honor of Nikola Tesla.
• The strongest fields observed on Earth from permanent magnets are from the spheres of Halbach and can be over 4.5 T.
• Scientists at the National High Magnetic Field Laboratory's Los Alamos National Laboratory campus, the world's first 100-tesla non-destructive magnetic field, have created the record for the highest continuous pulsed magnetic field.

• In the International System of Units, a candela is the base unit of luminous intensity; that is, the luminous power per unit of solid angle emitted in a particular direction by the point light source.
• In the International System of Units, kelvin is the base unit of temperature with the unit symbol K.
• In the International System of Units, the ampere, sometimes shortened to 'amp', is the base unit of electric current.