Question

Select the appropriate option from column 'B' for each statement of column 'A' and match the correct pair.

Answer 1

A) Unit of current density:
Current Density is the measurement of electric current (charge flow in amperes) per unit area of cross-section ($m^2$). It's SI unit is $A/m^2$. (2)
B) Refractive index:
The ratio of the velocity of light in a vacuum to its velocity in a specified medium. By applying the Snell's Law and considering the geometry one can easily find out that:
Refractive index, $n=\frac{Realdepth}{Apparentdepth}$. (4)
C) Shunted galvanometer
Galvanometer is a very sensitive instrument, iIn order to convert a galvanometer into an Ammeter, a very low resistance known as "shunt" resistance is connected in parallel to Galvanometer. Therefore, Shunted galvanometer is ammeter. (1)
D) Communication channel:
Communication channels refer to the way this information flows within the organization and with other organizations that is a physical medium. (3)
E) Minimum energy of electron emission
In the photoelectric effect, the work function is the minimum amount of energy (per photon) needed to eject an electron from the surface of a metal. (7)