8.0 x 106 NC-1
4.0 x 106 NC-1
4.0 x 104 NC-1
2.0 x 104 NC-1
Correct answer is B
E = \(\frac{F}{Q} = \frac{80}{2 \times 10^{-5}}\)
= 4 x 10\(^6\) NC\(^{-1}\)
negative charges flows to the ground through the person's body
positive charges flow from the ground through his body to neutralize the negative charges
positive charges in the air neutralizes the negative charges the person is holding
negative charges will leak through the air
Correct answer is A
No explanation has been provided for this answer.
The eye defect caused by an uneven curvature of the cornea or lens or both is
myopia
presbyopia
astigmatism
hypermetropia
Correct answer is C
Astigmatism is a common refractive error of the eye that occurs when the cornea or lens has an irregular shape. In a normal eye, the cornea and lens have a smooth, evenly curved surface, similar to a sphere. However, in astigmatism, the cornea or lens may be more curved in one direction than the other, resulting in a refractive error.
Stunted growth and small yellow leaves in plants are symptoms of the deficiencies of
nitrogen
iron
sulphur
magnesium
Correct answer is B
Iron deficiency in plants leads to chlorosis, which is the yellowing of leaves. Chlorosis occurs because iron is necessary for the formation of chlorophyll, which is the green pigment in plants that absorbs light energy for use in photosynthesis. Without sufficient iron, the plant cannot produce enough chlorophyll, leading to yellow leaves. Stunted growth is also a symptom of iron deficiency as iron is essential for various metabolic processes including DNA synthesis.
An example of a process that involves osmosis is the
movement of water from root hairs into cortical cell
reabsorption of food nutrients from the kidney into blood capillaries
translocation of starch from leaves to all parts of a plant
movement of digested food from ileum into blood capillaries
Correct answer is A
Movement of water from root hairs into cortical cells involves osmosis. When a plant's roots absorb water from the soil, it passes through the root hairs and moves into the cortical cells (which are part of the root's inner layer) through osmosis. This osmotic movement of water helps maintain water balance and nutrient distribution within the plant.