#1 The reciprocal of resistivity is________
The expression for resistivity is= RA/l. The expression for conductivity= Cl/A; C=1/R => Conductivity= l/(AR) = 1/resistivity. Hence, conductivity is the reciprocal of resistivity.
#2 Which protocol is used to convert IP addresses to MAC addresses?
The Address Resolution Protocol (ARP) feature performs a required function in IP routing. ARP finds the hardware address, also known as Media Access Control (MAC) address, of a host from its known IP address. ARP maintains a cache (table) in which MAC addresses are mapped to IP addresses.
#3 The abbreviation ISP stands for___
An Internet service provider (ISP) is an organization that provides services accessing and using the Internet. Internet service providers may be organized in various forms, such as commercial, community-owned, non-profit, or otherwise privately owned.
#4 Which method is used to measure the color of water?
The colors in water are measured by Tintometer method. It is measured on Burgess scale or cobalt scale by Nessler’s tube.
#5 The permissible limit of turbidity of domestic water is ____ ppm.
According to WHO, the permissible limit for drinking water is 5NTU.