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When do we feel uneasy? (A) Function of...

When do we feel uneasy?
(A) Function of different parts of body are affected.
(B) Function of body systems are affected.
(C) Symptoms of different diseases are seen
(D) All the above

A

Function of different parts of body are affected.

B

Function of body systems are affected.

C

Symptoms of different diseases are seen

D

All the above

Text Solution

Verified by Experts

The correct Answer is:
D
All the above
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Acceleration of particle moving along the x-axis varies according to the law a=-2v , where a is in m//s^(2) and v is in m//s . At the instant t=0 , the particle passes the origin with a velocity of 2 m//s moving in the positive x-direction. (a) Find its velocity v as function of time t. (b) Find its position x as function of time t. (c) Find its velocity v as function of its position coordinates. (d) find the maximum distance it can go away from the origin. (e) Will it reach the above-mentioned maximum distance?

The ciliary muscles of eye control the curvature of the lens in the eye and hence can alter the effective focal length of the system. When the muscles are fully relaxed, the focal length is maximum. When the muscles are strained, the curvature of lens increases. That means radius of curvature decreases and focal length decreases. For a clear vision, the image must be on the retina. The image distance is therefore fixed for clear vision and it equals the distance of retina from eye lens. It is about 2.5cm for a grown up person. A perosn can theoretically have clear vision of an object situated at any large distance from the eye. The smallest distance at which a person can clearly see is related to minimum possible focal length. The ciliary muscles are most strained in this position. For an average grown up person, minimum distance of the object should be around 25cm. A person suffering from eye defects uses spectacles (eye glass). The function of lens of spectacles is to form the image of the objects within the range in which the person can see clearly. The image o the spectacle lens becomes object for the eye lens and whose image is formed on the retina. The number of spectacle lens used for th eremedy of eye defect is decided by the power fo the lens required and the number of spectacle lens is equal to the numerical value of the power of lens with sign. For example, if power of the lens required is +3D (converging lens of focal length 100//3cm ), then number of lens will be +3 . For all the calculations required, you can use the lens formula and lensmaker's formula. Assume that the eye lens is equiconvex lens. Neglect the distance between the eye lens and the spectacle lens. Q. Maximum focal length of a eye lens of a normal person is

The ciliary muscles of eye control the curvature of the lens in the eye and hence can alter the effective focal length of the system. When the muscles are fully relaxed, the focal length is maximum. When the muscles are strained, the curvature of lens increases. That means radius of curvature decreases and focal length decreases. For a clear vision, the image must be on the retina. The image distance is therefore fixed for clear vision and it equals the distance of retina from eye lens. It is about 2.5cm for a grown up person. A perosn can theoretically have clear vision of an object situated at any large distance from the eye. The smallest distance at which a person can clearly see is related to minimum possible focal length. The ciliary muscles are most strained in this position. For an average grown up person, minimum distance of the object should be around 25cm. A person suffering from eye defects uses spectacles (eye glass). The function of lens of spectacles is to form the image of the objects within the range in which the person can see clearly. The image o the spectacle lens becomes object for the eye lens and whose image is formed on the retina. The number of spectacle lens used for th eremedy of eye defect is decided by the power fo the lens required and the number of spectacle lens is equal to the numerical value of the power of lens with sign. For example, if power of the lens required is +3D (converging lens of focal length 100//3cm ), then number of lens will be +3 . For all the calculations required, you can use the lens formula and lensmaker's formula. Assume that the eye lens is equiconvex lens. Neglect the distance between the eye lens and the spectacle lens. Q. Maximum focal length of a eye lens of a normal person is

The ciliary muscles of eye control the curvature of the lens in the eye and hence can alter the effective focal length of the system. When the muscles are fully relaxed, the focal length is maximum. When the muscles are strained, the curvature of lens increases. That means radius of curvature decreases and focal length decreases. For a clear vision, the image must be on the retina. The image distance is therefore fixed for clear vision and it equals the distance of retina from eye lens. It is about 2.5cm for a grown up person. A perosn can theoretically have clear vision of an object situated at any large distance from the eye. The smallest distance at which a person can clearly see is related to minimum possible focal length. The ciliary muscles are most strained in this position. For an average grown up person, minimum distance of the object should be around 25cm. A person suffering from eye defects uses spectacles (eye glass). The function of lens of spectacles is to form the image of the objects within the range in which the person can see clearly. The image o the spectacle lens becomes object for the eye lens and whose image is formed on the retina. The number of spectacle lens used for th eremedy of eye defect is decided by the power fo the lens required and the number of spectacle lens is equal to the numerical value of the power of lens with sign. For example, if power of the lens required is +3D (converging lens of focal length 100//3cm ), then number of lens will be +3 . For all the calculations required, you can use the lens formula and lensmaker's formula. Assume that the eye lens is equiconvex lens. Neglect the distance between the eye lens and the spectacle lens. Q. Maximum focal length of a eye lens of a normal person is

KUMAR PRAKASHAN-HUMAN HEALTH AND DISEASE -Section - F (Multiple Choice Question) (MCQs FROM .DARPAN. BASED ON TEXTBOOK)
  1. Assertion (A): Codeine causes addiction. Reason (R] : Codeine is an ...

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  2. Diseases which are spread by mosquito can be controlled by fishes like...

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  3. When do we feel uneasy? (A) Function of different parts of body are a...

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  4. S - The secondary response is very intensive. R - For secondary resp...

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  5. Which of the following is used by sports persons ?

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  6. Cells involved in immune mechanism are

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  7. Where are IgA, IgM and IgE antibodies found ?

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  8. Which of the following is not a type of cancer ?

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  9. What is done to find out the reason of allergy ?

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  10. By which cell present in the blood primary and secondary immunity resp...

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  11. S- Filarial worm is ovaviviparous. R - The kid worms of filaria are ...

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  12. Culex fatigan is a (A) Worm (B) Virus (C) Mosquito (D) Bacteria

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  13. Write the correct sequence about the HIV infection. (1) HIV enters i...

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  14. Slow respiration, slow pulse rate and constriction of pupil occurs due...

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  15. Immunity acquired after an infection is......... (A) active immunity ...

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  16. LSD is prepared from (A) Lichen (B) Algae (C) Fungus (D) Bacte...

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  17. The unrestraint growth of specific tissues in the body result in non-i...

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  18. Which of the following is an infectious disease ?

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  19. Which chemical is the treatment used for allergens ?

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  20. From where Marijuana is obtained ? (A) From flower tops, leaves and r...

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