A wire of resistance 5 Ω is bent into a circular loop
and the resistance between its diametrically opposite
points is measured to be R. Now, it is stretched so that
its length is increased by twice its original. Again, it
is bent into a bigger circular loop and the resistance
between its diametrically opposite points is measured
to be R'. Then R : R' will be
A 1 : 4
B 9 : 1
C 1 : 9
D 1 : 1
Refer to the given figure of human digestive system and select the option which correctly answers (i), (ii) and (iii).
(i) The inner lining of which of the labelled parts secretes mucus and hydrochloric acid?
(ii) Juice secreted from which of the labelled parts breaks down fats completely into fatty acids and glycerol?
(iii) The food that remains undigested and unabsorbed passes into which of the labelled parts?
A (i) - P, (ii) - Q, (iii) - S
B (i) - P, (ii) - R, (iii) - S
C (i) - R, (ii) - P, (iii) - Q
D (i) - Q, (ii) - R, (iii) - P
what is the answer
Match column I with column II and select the correct option.
|Column I||Column II|
|(A) Dirty clothes||1. Make you feel uncomfortable|
|(B) Tight clothes||2. Can make you sick|
|(C) Warm clothes||3. Protect you from rain|
|(D) Cotton clothes||4. Protect you from cold|
|(E) Waterproof clothes||5. Make you feel cool|
A (A)-1, (B)-4, (C)-3, (D)-2, (E)-5
B (A)-5, (B)-3, (C)-2, (D)-1, (E)-4
C (A)-2, (B)-1, (C)-4, (D)-5, (E)-3
D (A)-3, (B)-2, (C)-4, (D)-1, (E)-5
Study the given flow chart.
Select the INCORRECT statement regarding P-S.
A P could breathe through spiracles whereas Q could breathe through lungs.
B R could be climbing bird whereas S could be perching bird.
C Q could possess webbed feet whereas S could possess talons.
D P could use its beak to sew leaves with material like thread and wool whereas R weaves the grass in and out rapidly.
_________ should be present sufficiently in a healthy house.
A Clean and fresh air
D Both (A) and (B)
Clean and fresh air and sunlight should be present in a sufficiently healthy house
Read the given statements and select the correct option.
Statement 1 : Moon is a very silent place.
Statement 2 : There is no air on the Moon.
(A) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
(B) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
(C) Statement 1 is correct and statement 2 is incorrect.
(D) Both statements 1 and 2 are incorrect.
Study the given figure.
Which of the following is correct regarding P-T.
AS maintains a proper osmotic pressure in the cell for its turgidity and water absorption whereas P synthesises proteins.
BR liberates oxygen which is passed into atmosphere whereas T synthesises some of the enzymes required for its functioning.
CQ directs the synthesis of some structural proteins and chemicals required for cell growth whereas P mediates production of hormones by endocrine glands.
DBoth B and C.
i can't understand what enzymes secreted by mitochondria and how are they helpful for chloroplast for photosynthesis.