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InterviewSolution
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.
| 1401. |
Myopia and Presbyopia |
Answer» SOLUTION :
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| 1402. |
Mention the chromosome pair present in zygote which determines the sex of (i) a female child, and (ii) a male child |
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Answer» Solution :(i) A female child has XX. (ii) A male child has XY  This SHOWS that male GAMETES determine the sex of the child and there is 1 :1 POSSIBILITY of the couple having a girl or a BOY child. |
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| 1403. |
Why are copper wires used as connecting wires ? |
| Answer» SOLUTION :COPPER is a GOOD CONDUCTOR of electricity so copper wires are used as connecting wires. | |
| 1404. |
The radioactive elements emit harmful radiations are ……… rays |
| Answer» SOLUTION :ALPHA, BETA, GAMMA | |
| 1405. |
Find the focal length of a lens of power -2 D. Aslo state the type of lens. |
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Answer» Solution :Solution : P = ` 1/(f ("in meter")) ` -2 = `1/f ` f= `1/-2` f= `1/2 xx 100 ` f = -50 `therefore` FOCAL LENGTH of lens = -50 CM |
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| 1406. |
Movement against tobacco : Tata trust : : Education of slum children : …. |
| Answer» SOLUTION :SALAAM MUMBAI FOUNDATION | |
| 1407. |
The degenerated wing of a Kiwi is an acquired character. Why is it an acquired character? |
| Answer» Solution :The KIWI did not use its wings for a LONG time. According to use and DISUSE theory, the wings of Kiwi degenerated. Hence it is known as acquired CHARACTER. | |
| 1408. |
Two coils of insulated copper wire are wound over a non conducting cylinder as shown. Coil I has larger number of turns. (i) Write your observations when, (a) key K is dosed, (b) key K is opened, (ii) Give reason for your observations. (iii) Mention the name of the phenomenon involved and define it. (iv) Name of two coils used ln this experimenl (v) State the rule which gives the direction of induced current |
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Answer» Solution :(i) (a) A momentary DEFLECTION is shown by the galvanometer. (b) A momentary deflection is shown by the galvanometer but in the opposite direction. (ii) When key is closed or opened, the current in the coil I changes, therefore the magnetic FIELD linked with coil Il changes and HENCE a current is induced in it. (iii) Electromagnetic induction : The process by which a changing magnetic field in a conductor induces current in another conductor. (iv) Primary coil :coil I Secondary coil : coil II (v) Fleming.s Right Hand Rule : Stretch the first three fingers of the right hand mutually PERPENDICULAR to each other such that the forefinger gives the direction of magnetic field and the thumb points in the direction of the motion of a conductor then, the middle finger will give the direction of the induced current. |
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| 1409. |
Which one of the following materials cannot be used to make a lens ? |
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Answer» Water |
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| 1410. |
What is apparent expansion ? |
| Answer» Solution :The EXPANSION of a liquid apparently OBSERVED WITHOUT considering theexpansion of the CONTAINER is CALLED the apparent expansion of liquid. | |
| 1411. |
A coil made of insulated copper wire is connected to a galvanometer. What will happen to the deflection of the galvanometer if this coil is moved towards a stationarybar magnetand then moved away from it? Give reason for your answer and name the phenomenon involved. |
| Answer» Solution :When COIL is MOVED towards a stationary magnet, the magnetic field associated with the coil will change and so current will be induced in the coil. This causes GALVANOMETER to show deflection in one direction. Now when coil is moved away, the magnetic field will decrease and so current INDUCES in the OPPOSITE direction causing galvanometer to show deflection in opposite direction. The phenomenon is electromagnetic induction. | |
| 1412. |
What is meant by 'absolute refractive index' of medium ? How is it represented ? |
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Answer» Solution :1. The REFRACTIVE index of a medium with respect to vacuum is CALLED its ABSOLUTE refractive index. 2. It is REPRESENTED as 'n'. |
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| 1413. |
The value of variation of accelaration due to gravity (g) is ……………………. at the centre of the earth. |
| Answer» SOLUTION :zero | |
| 1414. |
Social health is the ability of a person to estabish relationship with other persons. |
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| 1416. |
What the following symbols mean in an electric circuit. (a) |
| Answer» SOLUTION :(a) Rheostat (B) Plug key ( CLOSED ) | |
| 1417. |
What is the effective resistance in the given circuit? |
Answer» Solution :As TWO resistance are connected in SERIES, HENCE the EFFECTIVE resistance `R=2+2=4 Omega` 
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| 1418. |
The image of an object formed by a lens is of magnification -1. If the distance between the object and its image is 60 cm, what is the focal length of the lens? If the object is moved 20 cm towards the lens, where would the image be formed? State reason and also draw a ray diagram in support of your answer. |
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Answer» SOLUTION :Image with magnification -1 MEANS image is inverted and of the same size. Therefore, object is at 2 F and the image is also at 2F on the other side of the lens. Therefore, distance between the object and its image is 4f=60 cm `impliesf=15cm` Object distance 2f=30 if the object is shifted towards the lens by 20 cm , the new object distance =30 cm - 20 cm =10 cm This distance is less than the FOCAL length and the image formed in this CASE would be virtual, erect and will form on the same as the object. 
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| 1419. |
Two blocks of ice when pressed together join to form one block. It happens because |
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Answer» MELTING point falls with pressure |
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| 1420. |
Identify the processshown in the figure . |
| Answer» Solution :The figure SHOWS modern LAND fill site where microbial BIODEGRADATION PROCESS is CARRIED out . | |
| 1421. |
What are natural resources ? State two factors that work against an equitable distribution of these resources. |
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Answer» Solution :Natural resources are the STOCKS of nature whether living or non - living such as air , water , soil, ANIMALS and plants which are useful to the mankind.Two FACTORS that work against an equitable distribution of these resources are : (i)money and (ii)POWER. |
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| 1423. |
Radial symmetry is |
| Answer» SOLUTION :If an animal body is divided by an IMAGINARY axis which PASSES through the central axis and in any plane of the body, forming TWO equal HALVES, then such symmetry is called radial symmetry. | |
| 1424. |
Those organs which have the same basic structure but different functions are called |
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Answer» VESTIGIAL ORGANS |
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| 1425. |
Which will be possible benefits of this therapy in organ transplantation ? |
| Answer» Solution :With the help of above therapy organs like LIVER , KIDNEY from STEM cells can be redeveloped to REPLACE the failed ONES . | |
| 1426. |
State one point of similarity between the image formed by the human eye and the camera. |
| Answer» SOLUTION :Both from REAL and INVERTED IMAGES. | |
| 1427. |
I. Locate and name the water reservoirs in figures (a) and (b). II. Which has an advantage over the other and why? |
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Answer» Solution :I. The water reservoir is a pond in fig. (a) and undergroung waterbody in fig. (b) i.e., underground water body has more advantage over fig. (a) and water reservoir, II. There are many ADVANTAGES of water stored in the ground. Some of these are (i) It does not evaporate. (ii) It SPREADS out to RECHARGE wells and provides moisture for crops over a wide area. (III) It does not promote breeding of mosquitoes (unlike stagnant water collected in ponds etc). (iv) It is free from contamination by human and animal wastes. (v) It is utilised for the benefit of local POPULATION. |
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| 1428. |
A person who is sitting at a distance of 400 m from a source of sound is listening to a sound of 600 Hz. Find the timee period between successive compressions from the source? |
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Answer» Solution :FREQUENCY `=(1)/("Time PERIOD")` `:.` Time period `(1)/("Frequency")=(1)/(600)` `T=0.00167` seconds he time period between successive compressions from the source is 0.00167 seconds. |
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| 1430. |
The number of periods and groups in the periodic table are....... |
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Answer» 6,16 |
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| 1431. |
____________ is used to measure exposure rate of radiation in humans. |
| Answer» SOLUTION :ROENTGEN | |
| 1432. |
Gather information about major solar photovoltaic power generating plants and their capacity in India. |
Answer» SOLUTION :
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| 1433. |
Explain the use of Fleming,s right-hand rule in finding the direction of current induced in the conductor. |
Answer» SOLUTION :Fleming.s right hand thumb rule. Stretch the FOREFINGER, central finger and thumb of right hand in  mutually perpendicular DIRECTION. If the forefinger points in the direction of magnetic FIELD, thumb points along the direction of motion of the conductor, then the central finger points in the direction of induced current. |
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| 1434. |
The relationship between mass and energy can be given by ____________. |
| Answer» SOLUTION :`E=mc^(2)` | |
| 1435. |
Which of the following is not the correct diagram depicting budding in yeast? |
| Answer» SOLUTION : IV is not the CORRECT diagram because in budding in yeast the bud APPEARS as a PROTUBERANCE. | |
| 1436. |
If the refractive index of second medium with respect to first medium is "_(2)n_(1) and that of third medium with respect to second to medium is "_(3)n_(2), what and how much is "_(3)n_(1) ? |
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Answer» SOLUTION :`_(2)n_(1)=("Velocity of LIGHT in MEDIUM" 1 (V_(1)))/("Velocity of light in medium"2 (V_(2)))""....(i)` `_(3)n_(2)=("Velocity of light in medium" 2 (V_(2)))/("Velocity of light in medium"3 (V_(3)))""....(ii)` `_(3)n_(1)=("Velocity of light in medium" 2 (V_(1)))/("Velocity of light in medium"3 (V_(3)))""....(iii)` Multiply (i) and (ii) `""_(2)n_(1)xx""_(3)n_(2)=("Velocity of light in medium" 1 (V_(1)))/("Velocity of light in medium"2 (V_(2)))xx("Velocity of light in medium" 2 (V_(2)))/("Velocity of light in medium"3 (V_(3)))"` `""_(2)n_(1)xx""_(3)n_(2)=("Velocity of light in medium" 1 (V_(1)))/("Velocity of light in medium"2 (V_(3)))` `:.""_(2)n_(1)xx""_(3)n_(2)=""_(3)n_(1) ""..."from" (iii)` |
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| 1437. |
A cobalt specimen emits induced radiation of 75.6 millicurie per second. Convert this disintegration into becquerel. (one curie = 3.7xx10^(10) Bq) |
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Answer» Solution :Cobalt specimen emits induced RADIATION = 75.6 millicurie per second ( `"1 curie" = 3.7 x 10^(10)` BQ) So 75.6 millicurie = `75.6 xx 10^(-3) xx 1 "curie"` `75.6 xx 10^(-3) xx 3.7 xx 10^(10)` Bq `= 279.72 x 10^(7)` `= 2.7972 xx 10^(9) "Bq"` 75.6 millicurie per second is equivalent to `2.7972 xx 10^(9) "Bq".` |
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| 1438. |
Our body irritates if it comes in contact with jellyfish. |
| Answer» Solution :Jellyfish is a COELENTERATE that has cnidoblasts bearing tentacles. These cnidoblasts inject toxins to PARALYSE the PREY at the time of feeding. When jellyfish comes in CONTACT with our body , this toxin is RELEASED causing reaction to our skin . Therefore , our body gets irritation when we come in contact with jellyfish . | |
| 1439. |
Balanoglossus is connectinglink between non-chordates andchordates. |
| Answer» SOLUTION :(1) Balanoglossusshows some CHARACTERS of non-CHORDATES. (2) It also has notochord as in case of chordates. (3) Since it SHARES the characters of non-chordates and chordates, from the VIEW point of evolution, it is called connecting link between them. | |
| 1440. |
Give two eumples for applications of heating effect of electric current |
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Answer» Solution :(a) ELECTRIC fuse (b) Electric WATER HEATER |
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| 1441. |
List four factors on which the magnitude of the force acting on a current-carryingconductorin a magnetic fielddepends. |
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Answer» Solution :Factors on which the force on a current-carrying conductor PLACED in a magnetic fielddepends are : i] Strength of magnetic field : F `prop` B ii] Strength of ELECTRIC current : F `prop` I iii] Length of the conductor : F `prop`L iv] Direction between current and magnetic field : `F prop sin theta` Magnitude of the magneticforce is hence F = BIL sin `theta` . |
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| 1442. |
What types of benefit and harm occur to human from animals of phylum - Arthropoda? |
| Answer» Solution :Some insects are very useful for us . We get many products from them e.g. Honey bee , Lac insect, Silk worm , are the insects that PROVIDE us with honey and WAX , lac and silk respectively . Theculture experiments are done on these insects for large scale production of these substances. Butterflies help in the POLLINATION of crops and are thus helpful for the farmers and garderners .Lady bug beetle is an insect which acts as a natural pest controlas it ATTACKS the other harmful insect pests. In biological pest control methods it is widely used . Some insects , on the contrary are very harmful . Mosquito , bed bugs, lice are blood sucking parasite which can spread the disease .Mosquito is a vector for dengue, filariasis and malaria. Some are biting insects that can cause wounds, somecause allergies of VARIOUS kinds. The grains and crops are destroyed to great extent by the insects. In this way the insects belonging to the phylum Arthropods are harmful to health, wealth and peace of mind too. | |
| 1445. |
Make a table based on forms of energy and corresponding devices. |
Answer» SOLUTION : 
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| 1446. |
Whatis the roleof the split rings in an electric motor ? |
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Answer» SOLUTION :The split rings act as a commutatorandits functionis to reversethe direction of the current flowingthrough THECOIL after EVERY halfrotation of the cell . Dueto reversing of thecurrent , the DIRECTIONOF rotatingcouple(i.e., torque)REMAINS unchangedand the coil continues to rotatein the same direction . |
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| 1447. |
Whatis the function of an earth wire ?Why is it necessary to earth metallic appliances ? |
| Answer» SOLUTION :Out of SYLLABUS | |
| 1448. |
Explain geothermal energy. How can it be harnessed to produce electrical energy ? |
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Answer» Solution :GEOTHERMAL ENERGY is heat energy trapped in hot regions CALLED hot spots when molten rocks are pushed upwards. When underground WATER comes in contact with hot spots, steam is generated. Steam trapped in rocks is ROUTED through a pipe to a turbine to generate electricity. Very few commercially viable sites are available where such energy can be exploited. |
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| 1449. |
A piece of wire having a resistance R is cut into five equal parts. a) How will the resistance of each part of the wire change compared with the original resistance ? b) If the five parts of the wire are placed in parallel, how will the resistance of the combination change ? c) What will be the ratio of the effective resistance in series connection to that of the parallel connection ? |
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Answer» Solution :(a) CONSIDER a pieces of WIRE having resistance R. It cut into 5 equal PARTS So number of equal resistros are 5. `n=5` When .n. resistors of equal resistance R are connected in series, the equivalent resistance is .nR. `:.R_(s)=nR` `R_(s)=5R` `R=(R_(s))/(5)rArr R=0.2R_(s)` Each PART of resistance .R. is equal to 0.2 times of ORIGINAL resistance. (b) Effective Resistance of 5 Resistors `(1)/(R_(p))=1/R+1/R+1/R+1/R+1/R` `=5/R` `R_(p)=R/5=0.2R` `R_(p)=0.2R` (c ) Effective resistance of series combination `R_(S)=5R` Effective resistance of parallel combination `R_(P)=(R)/(5)` The ratoi series connection to the parallel connection `(R_(S))/(R_(P))=(5R)/((R//5))` `(2)(9-R_(2)+R_(2))=(9-R_(2))R_(2)` `(R_(S))/(R_(P))=5Rxx(5)/(R)` `=25` `R_(S):R_(P)=25:1` |
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| 1450. |
NOTOCHORD |
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Answer» Solution :(1) Disaster Management Authority is the body that works at the level of government. From national level to village level, the work of District Disaster Management Authority is carried out. This work is basically about management of any disaster and tackling the problems of the affected people. (2) At National level there is National Disaster Management Authority from which the PRIME Minister is the chairman. For every state there are State Disaster Management Authority, where the CHIEF minister of every state is the chairman. (3) Under the state level, there are district level units where district collector is responsible for disaster management and implementation or rehabilitation schemes. (4) Below district level authority there ane Taluka and then Village Disaster Management Committees. The TAHSILDAR is the chairman for Taluka level while the Sarpanch of the village is responsible for management of disasters at village level. Collector of each district helps in planning, coordinating and controlling the implementation of rehabilitation programme and also gives essential instruction and reviews the ENTIRE system. |
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