Safety fuse wire used in domestic electrical appliances is made of metal of low

The instrument which uses sound waves to measure the depth of oceans is

The best conductor of heat among the following is

What is colour of light related to?

The maximum number of electrons on a principal shell is–

Who was the first non-Congress prime minister in independent modern India’s history?

The chairman and other members of UPSC appointed by-

The chief election commissioner hold office until they attain the age of –