In the following figures, optical instruments are placed inside boxes (A) and (B). Which of the following options is correct for these?
A In (A), the incident rays are diverged after refractions, so lens is concave.
B In (B), the incident rays are converged after refraction so mirror is convex.
C In (A), the incident rays are diverged after refraction so mirror is convex.
D In (B), the incident rays are converged after refraction so lens is concave.
Aren't both options A and B correct?
A cyclist moves from a certain point P and goes round a circle of radius a and reaches Q, exactly at the other side of the point P as shown in figure. The displacement of the cyclist would be
A is correct.
Ans 4: (Master Answer)
Refer to the given flow chart.
Identify X, Y and Z and select the incorrect option regarding them.
A X is formed in leaves of plants during photosynthesis.
B Z is essential for the normal functioning of thyroid gland.
C Consumption of excess of Y can lead to obesity and heart related problems.
D Z helps in formation of haemoglobin in the body.
please give solution. Did not understand .
A small plotting compass is placed between two strong magnets. The tip of the arrow represents the N-pole of the compass. What is the polarity of the end P of the right hand side magnet?
if the pole of the end p of the right hand side magnet will be north then it will not be possible for the compass needle to point towards a single direction .
Ans 1: (Master Answer)
Ans 2: (Master Answer)
Read the given passage carefully and answer the question
The phenomenon in which a bird or other animal moves from one place to another in one season, and returns again in a different season is called migration. It is an adaptation to escape the harsh conditions of their normal habitat so as to survive.
The __(i)__ flies from its native place in Russia to places like __(ii)__ in Rajasthan and __(iii)__ in Haryana during a particular season.
It stays in India for a few months and then goes back in __(iv)__ season. The general name given to birds like these is __(v)__ birds. Select the correct sequence of words to fill up the blanks in the above passage.
Which of the following is the probable method these migratory birds use to travel to the same place year after year?
Select the incorrect statement regarding water pollution.
A Suspended impurities make water less transparent causing death of submerged aquatic plants.
B Polluted water can cause diseases like typhoid, cholera and diabetes.
C Pollution decreases dissolved oxygen content of water.
D Agricultural runoff pollutes water by adding pesticides and fertilisers into it.
Farheen placed a grasshopper and a dish of water in a sealed glass tank. However, after some time, the grasshopper died. The grasshopper died due to the lack of _________.
A 1 only
B 1 and 2 only
C 2 and 3 only
D 1, 2 and 3
Immediate cause of death would be lack of air