## Kerala PSC Previous Years Question Paper & Answer

Title : HSA Physical Science (Malayalam Medium) NCA
Question Code : A

Page:11

Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'HSA Physical Science (Malayalam Medium) NCA' And exam conducted in the year 2019. And Question paper code was '055/2019/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.

page: 11 out of 32
Excerpt of Question Code: 055/2019/OL

A:-particle velocity is reversed
B:-phase of pressure variation is reversed
C:-no change in phase
D:-particle velocity remains constant
Question32:-Excess pressure inside a soap bubble of radius r and surface tension T is
A:P=ar°T
B:-P= 4 T/r
C:-P= 2T/r
D:-P= 2arT
Question33:-The critical velocity of liquid is
A:-directly proportional to velocity of a liquid
B:-inversely proportional to its density
C:-inversely proportional to radius if the tube
D:-All of these

Question34:-The terminal velocity of a water drop of radius r falling through the air (the coefficient of viscosity

of air is 1.8x10°° SI Unit) is
A:-0.12m/s
B:-0.102m/s

C:-0.012m/s