User Forum

Read the given statements about a human body system.
1. It consists of brain, spinal cord and nerves.
2. It controls all our actions like seeing, hearing, walking and learning.
The body system referred in the given statements is

ACirculatory system
BRespiratory system
CNervous system
DDigestive system.

Refer to the given diagram where X and Y represent substances while P and Q represent organs.

Which of the following best represents organs P and Q; and substances X and Y?

Organ P---Organ Q---Substance X---Substance Y

ASmall intestine---Pancreas---Water---Undigested food
BLarge intestine---Small intestine---Digested food---Water
CLarge intestine---Anus---Digested food---Water
DSmall intestine---Large intestine---Digested food---Undigested food

Force X opposes the motion of an object when the object is in contact with another object or surface. Identify force X and select the incorrect statement regarding it.

AIn smooth surfaces, force X will be greater.
BForce X can be reduced by using lubricant.
CForce X can produce heat.
DIf effect of force X is more than the forward motion of ball it will move a lesser distance.

Refer to the given classification table and select the option that correctly identifies X and Y.

An under-water swimmer cannot see very clearly even in absolutely clear water because of

A Absorption of light in water
B Scattering of light in water
C Reduction of speed of light in water
D Change in the focal length of eye lens.

In which of the following options, wheel and axle is NOT used?

ADoor knob
BTweezers
CSkateboard
DBus

The sliding frictional force between a 4 kg box and the floor is 15 N. It is pushed across the floor with a constant force such that it accelerates at 0.8 ms^-2.
What is the force applied to the box ?

A 9.1 N
B 18.2 N
C 3.6 N
D 6.2 N

Match column I with column II and select the correct option from the given codes.


A1 → r, 2 → s, 3 → p, 4 → q
B1 → q, 2 → r, 3 → s, 4 → p
C1 → p, 2 → q, 3 → r, 4 → s
D1 → s, 2 → q, 3 → p, 4 → r

The given diagram shows magnet P, magnet Q and magnet R.

Based on the diagram, identify the poles at X and Y.

Match column I with column II and select the correct option.


Aa - (v), b - (iv), c - (i), d - (iii), e - (ii)
Ba - (iii), b - (iv), c - (i), d - (v), e - (ii)
Ca - (iii), b - (ii), c - (i), d - (v), e - (iv)
Da - (i), b - (ii), c - (iii), d - (v), e - (iv)