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One destination to find everything from exams to study materials.
Exams |
Courses |
QnA |
Study Material
One destination to find everything from exams to study materials.
Exams |
Courses |
QnA |
Study Material
One destination to find everything from exams to study materials.
Exams |
Courses |
QnA |
Study Material
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Four student A, B, C and D traced the paths of incident ray and the emergent ray by fixing pains P and Q for incident ray and pains Rand S for emergent ray for a ray of light passing through a glass slab.
The correct emergent ray has been traced through the figure given in option (b). This is because figure in option (a) depicts no bending of light which is false. The figure in option (c) depicts the bending of light towards the normal ray which is not correct, it should be away from normal. In figurRead more
The correct emergent ray has been traced through the figure given in option (b). This is because figure in option (a) depicts no bending of light which is false. The figure in option (c) depicts the bending of light towards the normal ray which is not correct, it should be away from normal. In figure (d), only reflection is shown and refraction is not shown. So, the correct answer is: option (b)
See lessBacteria do not have chloroplast, but some bacteria are photoautotrophic in nature and perform photosynthesis.
Bacterial cells do not have chloroplast but some photoautotrophic bacteria perform photosynthesis in the presence of chlorophyll incorporated in the cell membrane. Embedded in the cell membrane are reaction centres which absorb light energy. These reaction centres exists in the form of sacs or tubesRead more
A ray of light incident at an angle of incidence ‘i’ passes through an equilateral glass prism such that the refracted ray inside the prism is parallel to its base and emerges from the prism at an angle of emergence ‘e’.
The correct Answer is (i)Â i2=i1 (ii) angle of deviation is minimum.
The correct Answer is (i)Â i2=i1
See less(ii) angle of deviation is minimum.
What is the other name of main vein ?
The main vein in your body is the vena cava.
The main vein in your body is the vena cava.
See lessThe figure given below represents an experimental set up with a weighing machine to demonstrate a particular process in plants.
(i) The process that intended for study by this experiment is transpiration. (ii) Transpiration is the process in which water is lost in the form of vapour from the aerial parts of the plant. (iii) After the experiment, we observe test tube A is raised up i.e., a loss of weight. In test tube B, theRead more
(ii) Transpiration is the process in which water is lost in the form of vapour from the aerial parts of the plant.Â
(iii) After the experiment, we observe test tube A is raised up i.e., a loss of weight. In test tube B, the weight remains unchanged.
Reason : In test tube A, loses weight due to the plant transpires and loses water. In B there is no plant so there is no transpiration and the oil on the surface prevents direct evaporation and so weight remains unchanged.Â
(iv) As a control experiment.Â
In a hydroelectric power station, 1000 kg of water is allowed to drop through a height of loo m in 1 sec.
Power out put = (mgh/t) = (work done)/time p x 100/60 =(1000 x 10 x 100)/1 p = (106 x 10 x 60)/100 = 6 x 105w.
Power out put = (mgh/t) = (work done)/time
p x 100/60 =(1000 x 10 x 100)/1
p = (106 x 10 x 60)/100 = 6 x 105w.
See lessSuppose you have focused on a screen the image of candle flame placed at the farthest end of the laboratory table using a convex lens.
In the case of candle flame , the object is placed beyond c , that means the image is formed or focused between c and f .in second case the object or sun is at infinity , so the image will be formed at focus.this means the distance between image and lens has decreased in the second case. either we hRead more
The de-Broglie wave length of a particle having velocity of 2.25 × 108 ms–1 is the same value of a photon wavelength, then the ratio of kinetic energy and photon energy of the particle is……….(take c = 3 × 108 ms–1)
(B) (3/8)
(B) (3/8)
See lessName one animal having single circulation of blood and another having double circulation.
Single circulation is the process in which blood flows only once through the heart during one heart beat. It is seen in fishes. Double circulation is the process in which the blood flows twice through the heart during each heart beat. This can be found in all mammals e.g humans.
- Single circulation is the process in which blood flows only once through the heart during one heart beat. It is seen in fishes.Â
- Double circulation is the process in which the blood flows twice through the heart during each heart beat. This can be found in all mammals e.g humans.
See lessWhat is meant by the term pH of a solution ? The pH of rain water collected from two cities A and B was found to be 6 and 5 respectively. The water of which city is more acidic ?
pH of a solution is a measure of the H+ concentration in a solution. Lesser the pH, more acidic is the solution. Thus, rain water of city B is more acidic.
pH of a solution is a measure of the H+ concentration in a solution. Lesser the pH, more acidic is the solution. Thus, rain water of city B is more acidic.
See less