Test: Units & Measurements - September 22, 2022 - NEET MCQ

There are 7 base units for measuring physical quantities according to the SI system. They are kilogram (kg) for mass, second (s) for time, kelvin (K) for temperature, ampere (A) for electric current, mole (mol) for the amount of a substance, candela (cd) for luminous intensity, and meter (m) for distance.

The unit for measuring luminous intensity is Candela (cd). Lightyear and Meter are units of distance. Mol is unit of amount of a substance.

The full for of SI is System International. It was first adopted in 1960 in the General Conference on Weights and Measures.

Newton is the SI unit for force. Joule and Newton-meter are the SI units for Energy and work. Meter is the SI unit for distance.

1 Mega Joule = 1000000 Joules. Therefore 89 Mega Joules = 89000000 Joules.

One Newton equals to 100000 Dynes, hence 5 N equal to 500000 Dynes. Dyne is unit of force in the CGS system.

MKS stands for meter-kilogram-second. CGS stands for centimeter-gram-second. SI stands for System international. Decibel is a unit of sound intensity.

A voltmeter is used for measuring voltage. An ammeter is used for measuring current. A combination of both can be used to determine the resistance in a simple circuit.

AS plane angles are measured in radians, in the same way solid angles are measured in steradians. A solid angle can be interpreted as the 3-dimensional form of a plane angle.

Fahrenheit is the unit for temperature. Other units include Celsius and Kelvin.