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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 18601. |
निम्नलिखित शब्दों के प्रत्यय पहचानकर लिखिए :कठिनाईअपराधीनियमितदंडनीयबीमारीकर्जदारपरेशानीअंतिमहरमजदगीजबरदस्तीसाहित्यकारविधवापनकथाकारबंदीमौलिकभयंकरताव्यापारीअपेक्षितविषयकहरामीपनमेहनतीक्रियाशीलचिन्तितरिश्तेदार |
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Answer» 1. कठिनाई – कठिन + आई 2. अपराधी – अपराध + ई 3. नियमित – नियम + इत 4. दंडनीय – दंड + ईय 5. बीमारी – बीमार + ई 6. कर्जदार – कर्ज + दार 7. परेशानी – परेशान + ई 8. अंतिम – अंत + इम 9. हरमज़दगी – हरमज़ादा + गी 10. जबरदस्ती – जबरदस्त + ई 11. साहित्यकार – साहित्य + कार 12. विधवापन – विधवा + पन 13. कथाकार – कथा + कार 14. बंदी – बन्द + ई 15. मौलिक – मूल + इक 16. भयंकरता – भयंकर + ता 17. व्यापारी – व्यापार + ई 18. अपेक्षित – अपेक्षा + इत 19. विषयक – विषय + क 20. हरामीपन – हरामी + पन 21. मेहनती – मेहनत + ई 22. क्रियाशील – क्रिया + शील 23. चिन्तित – चिन्ता + इत 24. रिश्तेदार – रिश्ता + दार |
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| 18602. |
निम्नलिखित अशुद्ध वाक्यों को शुद्ध करके फिर से लिखिए :सभा में अनेकों लोग उपस्थित थे।आज संजय का जन्मोस्तव है।यह सब लोग कहाँ चले गये? |
Answer»
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| 18603. |
निम्नलिखित अशुद्ध वाक्यों को शुद्ध करके फिर से लिखिए :मुझे मिलाकर पानी में रख दो।तुम मुजे अच्छी तरह समझ लो।माँ को झुट से नफरत है।मैं बहोत थक गया हूँ।पृथ्वी एक गृह है। |
Answer»
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| 18604. |
नरेन्द्र ने लड़के को क्या दिया?a. अठन्नीb. चवन्नीc. शिवलिंगd. रुपया |
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Answer» सही विकल्प है b. चवन्नी |
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| 18605. |
राज-काज का काम कैसे अच्छी तरह से चल सकता है? |
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Answer» हजरत अली राजकाज के लिए राज की मोमबत्ती जलाते थे। अपना काम करने के लिए वे राज की मोमबत्ती बुझाकर अपनी मोमबत्ती जलाते थे। निजी काम के लिए राज की मोमबत्ती जलाना उनकी नजर में चोरी और हरामखोरी थी। राजकाज में हजरत अली जैसी प्रामाणिकता रखी जाए तो ही वह अच्छी तरह से चल सकता है। |
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| 18606. |
Assertion(A): Alkyl amines are stronger base than Ammonia. Reason (R): When a +I gorup like alkyl group is attached to nitrogen increases the electron density on the nitrogen which makes the electron pair readily available for protonation.(a) Both A and R are correct and R is the correct explanation of A (b) Both A and R are correct but R is not the correct explanation of A (c) A is wrong but R is correct (d) A is correct but R is wrong |
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Answer» (a) Both A and R are correct and R is the correct explanation of A |
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| 18607. |
What happens to the lens and the ciliary muscles when you are looking at distant objects and near objects? |
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Answer» a) The ciliary muscles become relaxed and the lens becomes thin, i.e. its radius of curvature increases. So focal length of eye lens increases for distant object. b) The ciliary muscles contract and the lens becomes thick, i.e. its radius of curvature decreases. So focal length of eye lens decreases for near objects. |
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| 18608. |
In the usual notation, the momentum of a photon is (A) hvc (B) \(\cfrac{hv}c\)(C) \(\cfrac{hλ}c\)(D) hλc. |
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Answer» Correct option is (B) \(\cfrac{hv}c\) |
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| 18609. |
When objects at different distances are seen by the eye one of the following remains constant. A) focal length of the human eye lens B) object distance from eye lens C) the radii of curvature of eye lens D) image distance from eye lens |
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Answer» D) image distance from eye lens |
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| 18610. |
State one role of ciliary muscles in the human eye. |
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Answer» Ciliary muscles help the eye lens to focus the image of an object on the retina by increasing or decreasing the curvature of eye lens. |
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| 18611. |
State the role of ciliary muscles in accommodation. |
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Answer» It can adjust the focal length of the eye lens |
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| 18612. |
What is power of accommodation? How ciliary muscles help in accommodation? |
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Answer» The ability of eye lens to adjust its focal length to form a sharp image of the object at varying distances on the retina, is called its power of accommodation. Help by the ciliary muscles in accommodation: When we are looking at nearby object, the ciliary muscles contract, it increases the curvature of eye lens. The eye lens then becomes thicker. As a result, the focal length of the eye lens decreases in such a way that a clear sharp image of nearby object is formed on the retina. Thus, the object is seen clearly to us. When we are looking at distant object, these muscles are in relaxed position, the eye lens becomes thinner and the focal length of the eye lens increases. Therefore, the parallel rays coming from the distant object are focussed on the retina and the object is seen clearly to us. Thus, the accommodation power of an eye helps a person to see nearby as well as distant objects clearly. |
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| 18613. |
Why we have two eyes to view the objects? |
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Answer» We have two eyes to view objects because (i) Two eyes give a wider view The horizontal field of view having one eye is 150 degree while having both eyes is 180 degree. This means that with two eyes open we can see a wider area. (ii) Two eyes enable in judging the distance more accurately Our two eyes are a few centimeters apart from each other, due to this both the eyes see the same object from two slightly different angles and send two slightly different images of the same object to the brain. The brain combines these two slightly different images to create a three dimensional picture of objects which enable us to judge the distance of objects clearly. |
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| 18614. |
The function of the rods of the retina is to …………………… A) adjust focal length of the eye lens B) enable pupil to expand or contract to receive light C) identify the intensity of lightD) identify the colour of light |
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Answer» C) identify the intensity of light |
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| 18615. |
Nocturnal animals (animals which sleep during the day and come out at night) tend to have wide pupils and lot of rods in their retinas. Suggest reasons for this. |
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Answer» Wide pupils allow more light to enter the eye during night. Rod cells in the retina are sensitive to dim light and hence help in seeing properly at night. |
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| 18616. |
Which part of the eye acts as a cable which connects the eye with the brain? |
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Answer» The optical nerve acts as a cable which connects the eye with the brain. The image is formed at the retina and retina then sends the electrical signals to the brain through optical nerve and gives rise to the sensation of vision. |
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| 18617. |
State the role of ciliary muscles in accommodation. |
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Answer» Ciliary muscles help us to focus near and distant objects. The ciliary muscles can change the thickness of the soft and flexible eye lens and hence its focal length which, in turn, change the converging power of the lens. When looking at the distant object, ciliary muscles are fully relaxed and the eye lens is very thin. Its focal length is maximum in this position and converging power is minimum to focus the parallel rays on the retina. When looking at the nearby object, ciliary muscles get stretched and the eye lens becomes thick. Its focal length is minimum in this position and converging power is maximum to focus the diverging rays on the retina. |
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| 18618. |
Which part of the human eye contains “rods” and “cones” to receive the light signals? A) cornea B) iris C) pupil D) retina |
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Answer» Correct option is D) retina |
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| 18619. |
What is the nature of the image formed on the retina ? |
| Answer» Real, inverted and same-sized. | |
| 18620. |
What are Rods and Cones ? |
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Answer» Rods and cones are light-sensitive cells present in the retina. Rods control the intensity of light, while cones control the color perception. |
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| 18621. |
Statement X : The.focal length of the eye lens has maximum when the eye is focused on a distant object to focus the image.Statement Y : The focal length of the eye lens has maximum when the eye is focused ‘ on a closer object to focus the image. A) Both statements are true B) Both statements are false C) X is true, Y is false D) X is false, Y is.true |
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Answer» A) Both statements are true |
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| 18622. |
Name the part of the eye where the image is formed by the eye lens. What is the nature of the image formed? How is this image sent to the brain? |
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Answer» The eye lens converges the light rays to form the image on the retina. The image formed is real and inverted since the eye lens is convex in shape and we know that if the object is kept beyond the focal length the image formed is real and inverted. When the image falls on the retina the light-sensitive cells get activated and generate electrical signals. The retina sends these electrical signals to the brain through the optical nerves and gives rise to the sensation of vision. Although the image formed on the retina is inverted our mind interprets the image as that of an erect object. |
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| 18623. |
The part of the eye sensitive to light is ……………………….A) retina B) pupil C) ciliary muscles D) cornea |
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Answer» Correct option is A) retina |
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| 18624. |
There are two types of light-sensitive cells in the human eye : (a) Where are they found ?(b) What is each type called ? (c) To what is each type of cell sensitive ? |
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Answer» (a) The two types of light-sensitive cells are found in the retina. (b) They are called rods and cones. (c) Rods are sensitive to dim light and cones are sensitive to bright light and colours. |
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| 18625. |
Our eye is sensitive for which range of wavelength of light? |
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Answer» Our eye is sensitive to a wavelength range of 400 - 700 nanometers. This range is called the visible range. Any radiation having a wavelength greater or less is not sensitive to the human eye. |
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| 18626. |
Which phenomenon is responsible for making the path of light visible? |
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Answer» Tyndall effect. |
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| 18627. |
What is the principle of the working of the human eye ? |
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Answer» It is like a camera having a lens system forming an inverted, real image on the light-sensitive screen, retina inside the eye. |
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| 18628. |
Give one main difference between the lens of human eye and lens of camera. |
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Answer» Lens of human eye has flexible aperture, its focal length can be changed. In camera focal length can not be changed for a lens. |
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| 18629. |
State two properties of the image formed by the eye lens on the retina. |
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Answer» (a) Image on the retina is real and inverted. (b) Diminished in size. |
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| 18630. |
Explain the nature of image formed by human eye lens |
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Answer» Image found by a human eye lens is real and inverted. The eye lens is the convex lens .The object place beyond the focal length always forms a real and inverted image in a convex lens. The image is formed on retina. Although the image formed on retina is inverted out mind interprets the image as an erect object. |
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| 18631. |
The size of the pupil …………….. when you entered into a cinema hall. A) increases B) decreases C) remains same D) none |
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Answer» B) decreases |
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| 18632. |
The persistence of vision for normal eye is(a) (1/10)th of a second(b) (1/16)th of a second(c) (1/6)th of a second(d) (1/18)th of a second |
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Answer» The persistence of vision for normal eye is (1/16)th of a second. |
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| 18633. |
State whether the following statement is true or false : The image formed on our retina is upside-down |
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Answer» The image formed on our retina is upside-down True |
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| 18634. |
The phenomenon of light responsible for the working of the human eye is(a) reflection (b) refraction (c) power of accommodation (d) persistence of vision. |
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Answer» The phenomenon of light responsible for the working of the human eye is refraction. |
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| 18635. |
Which part of the eye contains cells which are sensitive to light ? |
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Answer» Retina contains cells which are sensitive to light |
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| 18636. |
…………….. lens is present in the human eye. A) Concave B) Convex C) Both D) None |
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Answer» Correct option is A) Concave |
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| 18637. |
The distance between the eye lens and retina is …………………..A) 2.25 cm B) 2.27 cm C) 2.5 cm D) 5 cm |
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Answer» Correct option is C) 2.5 cm |
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| 18638. |
The degree of convergence or divergence of light rays that can be achieved by a lens is called …………………..A) accommodation B) powerC) focal length D) none |
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Answer» C) focal length |
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| 18639. |
Name the cells on the retina of an eye which are sensitive to 1. bright light 2. dim light 3. sensation of colour. |
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Answer» 1. Cones 2. Rods 3. Cones |
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| 18640. |
The light sensitive cell present on retina and is sensitive to the intensity of light is: (a) cones (b) rods (c) both rods and cones (d) none of these |
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Answer» The light sensitive cell present on retina and is sensitive to the intensity of light is rods. |
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| 18641. |
Which of the following is true?A) The distance of virtual image is always greater than the object distance for convex lens. B) The distance of virtual image is not greater them the object distance for convex lens. C) Convex lens always forms a real image D) Convex lens always forms a virtual image |
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Answer» A) The distance of virtual image is always greater than the object distance for convex lens. |
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| 18642. |
The value of “least distance of distinct vision” at young age i.e below 10 years ………………. A) 25 cm B) 0 cm C) infinity D) 7 to 8 cm |
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Answer» Correct option is D) 7 to 8 cm |
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| 18643. |
The unit of power is ……………………… A) diopter B) meter C) centimetre D) 1/diopter |
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Answer» Correct option is A) diopter |
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| 18644. |
The human eye forms the image of an object at its …………………… A) cornea B) iris C) retina D) eyeball |
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Answer» Correct option is C) retina |
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| 18645. |
(a) Which parts of the eye cause rays of light to converge on the retina ? (b) Which part causes the greatest convergence ? (c) Which part brings the image into sharp focus on the retina ? How does it do this ? |
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Answer» (a) Cornea and eye-lens (b) Cornea (c) Eye lens By changing its thickness and hence conversing power |
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| 18646. |
The cells present in the retina of an eye which are sensitive to intensity of light are………………. A) rods B) cones C) both rods and cones D) none |
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Answer» Correct option is A) rods |
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| 18647. |
Doctor tested the eyes of Raj Kumar and identified that he had hypermetropia. The distance of near point is 50 cm. The power of the lens suggested by the doctor to him is …………………….. A) -2D B) + 1D C) – 1DD) + 2D |
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Answer» Correct option is D) + 2D |
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| 18648. |
The value of “least distance of distinct vision” for young adult human being is ………………A) 25 cm B) 5 cm C) 50 cm D) infinity |
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Answer» Correct option is A) 25 cm |
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| 18649. |
The range of vision for a young adult with normal vision …………………….. A) 0 to 25 cm B) 25 cm to 200 cm C) 25 cm to infinity D) zero to infinity |
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Answer» C) 25 cm to infinity |
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| 18650. |
The human eye forms the image of an object at its(a) cornea (b) iris (c) pupil (d) retina |
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Answer» The human eye forms the image of an object at its retina. |
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