National Science Olympiad Forum By SOF Olympiad Trainer - Page 254
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 4

Ans 1:

saketh from VIBGYOUR HIGH ,BTM layout Bangalore, Bangalore
Class : Class 4
d

Ans 2:

SAMRIDDHA PANDA from ST. MONFORT'S SENIOR SECONDARY SCHOOL, BARUIPUR
Class : Class 7
answer d

Post Your Answer

udaypnayar from DELHI PUBLIC SCHOOL, Bengaluru
Subject :NSO    Class : Class 10

A small conducting rod of length l, moves with a uniform velocity v in a uniform magnetic field B as shown in figure.


A The end X of the rod becomes positively charged.
B The end Y of the rod becomes positively charged.
C The entire rod is unerringly charged.
D The rod becomes hot due to joule heating.


By Fleming's right-hand rule, current flows from X to Y, but which end actually receives the extra positive charge?

Post Your Answer

Kanishk Mukherjee from BDM International, Kolkata
Subject :NSO    Class : Class 6

Ans 1:

Siddhartha from Gyanfort school, Farrukhabad
Class : Class 6
See, Y is feeding on x which means that population of X would definitely decrease. This means that eater of water beetle has decreased. This indicates that population of water beetle will increase. This means more food for fro with beetle. with g. Due to large amount of food frogs' population will also increase parallelly. In this way B would be correct . Sorry for too long answer.

Ans 2:

Akshat Jain from Delhi Public School, Greater Noida
Class : Class 8

Post Your Answer

ADYASHA DAS from KENDRIYA VIDYALYA DIAT GIRINAGAR, Pune
Subject :NSO    Class : Class 6

Ans 1:

Chinmay from SBPPS, Pune
Class : Class 7
C

Ans 2:

Ritvik Bansal from K R Mangalam World School, Gurgaon
Class : Class 7

Post Your Answer

Bhargavi from bvb, Pune
Subject :NSO    Class : Class 7

Two containers X and Y are filled with equal amount of hot water and the temperature of the water in the containers is measured with a thermometer some time later. It is observed that container X has a much lower temperature than container Y. Which of the following are the possible reasons?
(i) Container X is black and container Y is silver.
(ii) Container X has a lid and container Y is not covered.
(iii) Container X is made of steel and container Y is made of clay.

A(i) and (ii) only
B(i) and (iii) only
C(ii) and (iii) only
D(i), (ii) and (iii)

Post Your Answer

Chatresh ramasai gudi from Bgsnps , Bangalore
Subject :NSO    Class : Class 8

Ans 1:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
it should be b because they have asked in the increasing order

Ans 2:

Siya Aneja from Tagore International , SOUTH DELHI
Class : Class 8
The question asks the increasing order.. answer is B

Post Your Answer

Eklavya Gondule from DPS Bhilai, BHILAI
Subject :NSO    Class : Class 3

Ans 1:

Eklavya Gondule from DPS Bhilai, BHILAI
Class : Class 7

Post Your Answer

Ekagrah Agarwal from Delhi Public School, Greater Noida
Subject :NSO    Class : Class 6

Properties of a few substances are given as :
P : White solid, soluble in water, non-magnetic in nature, salty in taste
Q : Blue solid, insoluble in water, non-magnetic in nature, sweet in taste
R : White solid, soluble in water, non-magnetic in nature, sweet in taste
S : Black solid, magnetic in nature, insoluble in water
Read the given passage and fill in the blanks by selecting an appropriate option.
Substances __(i)__ when present in a mixture can be separated from each other by filtration or magnetic separation, substances __(ii)__ can be separated by magnetic separation only, while substances __(iii)__ when mixed in water are very difficult to separate by common methods of separation.

  (i) (ii) (iii)
A Q, R P, S Q, S
B P, S Q, S P, R
C P, S P, R Q, R
D Q, S P, R Q, P


Post Your Answer

Shreenand Pohane from Shahu's garden convent, Nagpur
Subject :NSO    Class : Class 1

Post Your Answer

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM
Subject :NSO    Class : Class 7

Ans 1:

Shaurya from Kothari International School, noida
Class : Class 8

Post Your Answer