Measurement MCQs for NEET — Physics Questions with Answers

The SI unit for luminous intensity is 'candela,' which is abbreviated as 'cd.' Candela is one of the seven base units in the International System of Units (SI). The correct abbreviation is always written in lowercase letters as 'cd'.

To find the ratio of 10 microns to 1 nanometer, you need to convert both units to meters first. 1 micron (µm) is $10^{-6}$ meters, and 1 nanometer (nm) is $10^{-9}$ meters. Therefore, the ratio is $ \frac{10 imes 10^{-6}}{10^{-9}} = 10^4 $. Hence, the correct option is $10^4$.

$ { 10 ^ {-15 } \over 100 \times 10 ^ {-9} } = 10 ^ {-8} $

The value of the gravitational constant (G) in the MKS system is $6.67 imes 10^{-11} ext{Nm}^2/ ext{kg}^2$. To convert this to CGS units, we need to convert meters to centimeters and kilograms to grams. 1 meter = 100 cm and 1 kilogram = 1000 grams. Therefore, $G$ in CGS units is $6.67 imes 10^{-11} imes (100^3)/(1000^2) = 6.67 imes 10^{-8} ext{dyn-cm}^2/ ext{gm}^2$. Hence, the correct option is $6.67 imes 10^{-8}$.

1 MeV (Mega electron Volt) is equal to $10^6$ electron Volts. Therefore, 1 MeV = $10^6$ eV.

Length, time and velocity cannot enter in to the list of fundamental quantities because velocity can be expressed in terms of length and time.

1 radian is equal to the angle subtended at the center of a circle by an arc whose length is equal to the radius of the circle. To convert radians to degrees, we use the formula: $1 ext{ rad} = rac{180}{ ext{Ï€}} ^ ext{circ}$.