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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.
| 5201. |
Two circularcoil A and B are placed closeto each other . If thecurrentin coil A ischanged , will somecurrentbe inducedincoil B ? Givereason . |
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Answer» Solution :YES , Current will beinduced in COIL B. Reason : Whenthe CURRENTIN coil A is chaned , the magneticfield around it changes . As the twocircularcoils(with their plances parallel to each other ) are placed closeto each other ,the magneticfield linked with coil B also CHANGE . Therefore, some CURRENTIS induced in coil B . |
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| 5202. |
What are coaxial lenses and where are they used? |
| Answer» Solution :COAXIAL lenses are lenses having common principal axes. A compound microscope, in its simple form , consists of coaxial lenses ( two lenses having same principal axes ) mounted on the outer ends of the hollow metallic TUBES. One of the lenses ACT as the OBJECTIVE and the other as the eyepiece. | |
| 5203. |
What is contraception? List its four different methods. State four reasons for adopting contraceptive methods. |
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Answer» Solution :A number of TECHNIQUES developed to prevent and CONTROL pregnancy is CALLED contraception. Different methods of contraception are: See Q. 13(Or), 2015-16 (Delhi). Reasons for adopting CONTRACEPTIVE methods. See Q 18(Or) (B), 2019 (Set 31/1/1). [Page 139] |
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| 5204. |
Nitrogen, oxygen : Gaseous cycle : : Soil and Rocks : …… |
| Answer» SOLUTION :SEDIMENTARY CYCLE | |
| 5205. |
Which of the following correctly describes the magnetic fieldnear a long straightwire ? |
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Answer» The field CONSISTS of straight lines PERPENDICULAR to the wire. |
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| 5206. |
Man is a "_________________" animal. |
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Answer» HERBIVOROUS |
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| 5207. |
Two wires have equal area of cross section. One is copper and other is Aluminium have the same resistance. Find Which one is longer. |
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Answer» Solution :Suppose the resistance of COPPER and aluminium wires are `R_(1)andR_(2).` Suppose their AREA of cross section is A, length of copper wire `=l_(1),` length of the Al wire `=l_(2)` The resistivity of copper `(rho_(1))=1.68xx10^(-8)` The resistivity of aluminium `(rho_(2))=2.82xx10^(-8)` Given that `R_(1)=R_(2)` `rho_(1)(l_(1))/(A)=rho_(2)(l_(2))/(A)` `(l_(1))/(l_(2))=(rho_(2))/(rho_(1))=(2.82xx10^(-8))/(1.68xx10^(-8))=1.678` `l_(1)=1.678l_(2)` `therefore` Length of copper wire 1.678 times more than length of aluminium wire. |
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| 5208. |
PQ is a current carrying conductor producing magnetic field around it. A and B are two points at a distance r_(1)and r_(2) from it. If r_(1) gtr_(2f)where is the magnetic strength greater and why ? |
| Answer» SOLUTION :At B, MAGNETIC strength at B is greater as `r_(2)`is LESSER than `r_(1)` | |
| 5209. |
List two advantages of vegetative propagation over other modes of reproduction. |
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Answer» Solution :TWO advantages of vegetative propagation :(i) It is the only MEANS of propagating such plants which do not PRODUCE viable seeds or produce very few seeds such as banana, orange, grape, ROSE and PINEAPPLE. (ii) Many identical plants having same characters can be raised by this method. |
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| 5210. |
The reciprocal of resistance is ……………………….. . |
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Answer» |
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| 5211. |
The presence of a particular group of bacteria in water bodies indicates contamination. Identify this group of bacteria. |
| Answer» SOLUTION :COLIFORM BACTERIA | |
| 5212. |
A concave lens made of a material of refractive index n_(1) is kept in a medium of refractive index n_(2). A parallel beam of light is incident on the lens. Trace the path of rays of light parallel to the principal axis incident on the concave lens after refraction when: (i) n_(1)gtn_(2) (ii) n_(1)=n_(2) Give reason for each. |
Answer» SOLUTION :  `n_(1)gtn_(2)` lens behave as DIVERGING lens  `n_(1)=n_(2)` no REFRACTION occurs. |
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| 5214. |
Find the current drawn from the battery by the network of four resistors shown in the figure . |
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Answer» Solution :TWO combinations of two parallel resistors of `10 Omega`each connected in series. `(1)/(R_(5))=(1)/(R_(1))+(1)/(R_(2))=(1)/(10)+(1)/(10)= (1+1)/(10) = (2)/(10)` `(2)/(10)=(1)/(5) Omega` `R_(5) = 5 Omega` `(1)/(R_(6))=(1)/(R_(3))+(1)/(R_(4))=(1)/(10)+(1)/(10)=(1+1)/(10)=(2)/(10)` `R_(6) =5 Omega` `R_(eq)=R_(5) +R_(6)= 5 Omega+5 Omega = 10 Omega` `I = (V)/(R) = (3)/(10)= 0.3 ` Amp. |
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| 5215. |
Ethanol, commonly called as alcohol is an excellent solvent, is used in medicines and is an important chemical compound involved in synthesis of many chemical compounds. However, in spite of its benefits to man its impact on social behaviour has always been questioned. Media has often shown abnormal behaviour of people while drunk. It is considered as a curse in the lives of those who are addicted to alcohol. 'Alcoholic' people are not only lowering their metabolism and affecting Central Nervous System, they are also a threat to the lives of others. Anger and rude behaviour are some of its ill effects. Answer the following questions based on the above information: (i) Comment on the statement-'should production of alcohol be banned?' Give three valid reasons to justify. (ii) As a student what initiative would you take in the common concern of 'Save Life, Do NotDrink'? Give two suggestions. |
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Answer» Solution :(i) In favour of negative response: (a) It is used as a solvent in the manufacture of varnishes, etc. (b) It is used in so many ways for medicines. ( c) It is used as a disinfectant. In favour of POSITIVE response: (a) Cause of death of many PEOPLE. (b) Many adolescents get AFFECTED out of it and become addicts, which affects their PHYSICAL as well as mental health. (c) Is being MISUSED even where it is of important use (for example, painting shops, industries). (ii) Initiatives: (a) Drive to spread awareness. (b) Skit/street plays/drama. (c) Organising exhibitions. (d) Organising debate. |
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| 5216. |
What is (a) the highest, (b) the lowest total resistance that can be secured by combinations of four coils of resistances 4 Omega, 8 Omega, 12 Omega, 24 Omega ? |
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Answer» SOLUTION :( a )The highest resistance can be secured (or obtained) by connecting all the four COILS in series. In this CASE, `R_s + R_1 + R_2 +R_3 +R_4` ` = 4 + 8 + 12 +24 =48 Omega` Thus, the highest resistance which can be secured is `48 Omega`. ( B )The lowest resistance can be secured by connecting all the four coils in parallel. In this case, `1/R_p = 1/R_1 + 1/R_2 + 1/R_3 + 1/R_4` `1/4+1/8 +1/12 + 1/24` `= (6 + 3 + 2 +1)/(24)` ` =12/24` `:. R_p = 24/12` `=2 Omega` Thus, the lowest resistance which can be secured is `2OMEGA`. |
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| 5217. |
The amount of scattering is independent of wavelength in Rayleight scattering. |
| Answer» SOLUTION :Correct STATEMENT- The amount of SCATTERING is independent of wavelength in Mie scattering. | |
| 5218. |
On what basis and how will you determine whether air is saturated with vapour or not? |
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Answer» SOLUTION :1.Relative humidity determines whether the air is saturated with water vapour or not. 2. If the relative humidity is 100%, then the air is saturated with water vapour. 3. If the relative humidity is more than 60% we FEEL that the air is humid. 4. If the relative humidity is LESS than 60%, we feel that the air is dry. |
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| 5219. |
Which vision defect causes the eye lens to become milky and cloudy ? |
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Answer» Myopia |
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| 5220. |
Draw ray diagrams to show the formation of images when the object is placed in front of a concave mirror : (i) between its pole and focus point, (ii) between its centre of curvature and focus point. |
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Answer» SOLUTION :(i) The image is formed as shown in FIGURE. The image is virtual, ERECT and MAGNIFIED. The image is formed behind the concave mirror. (ii) The ray diagram is shown in Figure. The image is real, inverted and magnified. The image is formed beyond centre of CURVATURE C of the concave mirror. 
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| 5221. |
If percentage errors in the measurement of mass and volume of an object are 2% and 3% respectively, then the percentage error in the measurement of the density of the object is : |
| Answer» Solution :`(Deltarho)/(RHO)xx100=(Deltam)/(m)xx100+(DELTAV)/(V)xx100=2%+3%=5%` | |
| 5222. |
we need to keep the PIN number of the debit card secret. |
| Answer» Solution :Debit card is used to withdrew our money from the bank account.During withdrewal,we have to use our PIN number is known to ANYBODY,he or she can withdrew all our money and LOOT us. Therefore,to prevent such FINANCIAL LOSS, we have to keep the PIN number of the debit card secret. | |
| 5224. |
When does an electric shortcircuit occur ? |
| Answer» Solution :When a LIVE wire and a neutral wire COME in contact directly or through a conductordue to damaged insulation, faulty appliance etc., the current flowing in the circuit RISES suddenly anda short circuitoccurs. | |
| 5225. |
Name any two endangered plant and animal species . |
| Answer» Solution :Endangered PLANT species species - Nepenthes khasiana (PITCHER plant ) and (Snow orchid.Endangered ANIMAL species - Indian WILD Ass and Great Indian Rhinoceros. | |
| 5226. |
Assertion : A freely falling body is in the state of weightlessness Reason : A body becomes conscious of its weight only when it is opposed |
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| 5227. |
Who will spend more electrical energy? 500 W TV set in 30 mins, or 600 W heater in 20 mins? |
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Answer» Solution :Given :TV set's POWER `(P_1)` =500 W Time `(t_1)` = 30 min = 30 x 60 s Heater Power `(P_2)` =600 W Time `(t_2)` = 20 min = 20 x 60 s To find: The device which CONSUMES more power Formula : Energy = Power x time Solution: TV SET `E_1=P_1 xx t_1` = 500 x 30 x 60 = 900000 J HEATER `E_2 = P_2 xx t_2` =600x 20 x 60 = 720000 J `therefore E_1 gt E_2` Energy consumed byTV set is more than Energy consumed by Heater |
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| 5228. |
Get information. Visit the district collector or Taluka Tehsildar office and collect the information about disaster management. |
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Answer» Solution :The district collector or Taluka Tehsildar are responsible for the following: 1. Implementing the national POLICY and plan, state policy and plan, and district and Taluka level plans. ii. Identifying the areas in the district vulnerable to disasters and takingmeasures for the prevention of disasters at the district as well as local level. iii. Organizing trainig programmes for officers, EMPLOYEES and VOLUNTEERS, rescue workers in the district and Taluka. iv. Orgaizing regular disaster management mock drills. v. Ensuring availabilty of relief and rescue materials at a short notice. vi. Identifying buildings or places which could be used as relief centres during the disaster and making arrangements for water supply ADN SANITATION in such buildings or places. vii. Implementing and controlling rehabilitation programme. |
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| 5229. |
The value of Universal gravitational constant is __________. |
| Answer» SOLUTION :`6.674 xx10^(-11) NM^(2) KG^(-2)` | |
| 5230. |
For a receiving tennis player. Explain what the path from the stimulus to the response is. |
Answer» SOLUTION :
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| 5231. |
Name some sources of direct current. |
| Answer» SOLUTION :Some of the sources of direct CURRENT are DRY cell battery, car battery, and DC generator. | |
| 5232. |
Molecules of pyruvic acid formed in this glycolysis are converted into molecules of Acetyl-Coenzyme A. |
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Answer» |
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| 5233. |
What is the used of telescope ? |
| Answer» Solution :It is an OPTICAL instrument to see the DISTANT objects like stars, PLANETS etc., in SPACE. | |
| 5234. |
Fertilisation is the process of |
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Answer» transfer of male GAMETE to female gamete |
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| 5235. |
A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant (a) linear speed (b) angular speed ( c) angular momentum (d) Kinetic energy ( e) potential energy (f) total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the sun. |
| Answer» Solution :A COMET while going on elliptical ORBIT AROUND the sun has CONSTANT ANGULAR momentum and total energy at all locations but other quantities very with locations. | |
| 5236. |
If the potential difference between the ends of a fixed resistor is halved, the electric power will become: |
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Answer» Double |
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| 5237. |
{:("Medium",,"Speed of sound" (ms^(-1))),((i)"Copper",-,(a)343),((ii)"Water",-,(b)331),((iii)"Air"(0^(@)c),-,(b)5010),((iv)"Air"(at20^(@)c),-,(d)1493):} |
| Answer» Solution :(i) © 5010 (ii) (d) 1493 (III) (b) 331 (iv) (a) 343 | |
| 5238. |
Tubefeet : |
| Answer» Solution :Tubefeet help in LOCOMOTION in CASE of animals BELONGING to PHYLUM Echinodermata. | |
| 5239. |
Your sister has become incommunicative. She prefers to remain alone. |
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Answer» Solution :The individual who prefers to be INCOMMUNICATIVE has lots of thoughts in his /her mind. If this is the case with siter, she will be taken into confidence and the reason behind this lack of communication will be found out. Most often such persons have DEPRESSION. So she will hot be LEFT alone. Her friends will be invited at home, so that she can converse with them. She should be motivated to MIX with her FAVOURITE people. She should She should be motivated to mix with her favourite people. She should be encouraged to pursue her hobbies. She should be helped in selecting such work, If nothing changes her, then the help of counsellor should be taken. |
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| 5240. |
Elements P, Q, R and S have atomic numbers 11, 15, 17 and 18 respectively. Which of them are reactive non-metals ? |
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Answer» <P>P and Q |
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| 5241. |
Incident ray, Refracted ray,Normal at the point of incidence , Angle of incedence. |
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| 5242. |
{:("1.Uranium core bomb", "(a) fusion bomb"), ("2. Plutonium core bomb", "(b) fission bomb"), (3. "Hydrogen bomb", "(c) Nagasaki"),(4. "Atom bomb" , "Hiroshima"):} |
| Answer» Solution :1. (d) Hiroshima 2. (C) Nagasaki 3. (a) fusion BOMB 4. (b) fission bomb | |
| 5243. |
Frequency of A.C. supplied to consumers in India is : |
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Answer» zero |
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| 5244. |
What do you know about gravitational force? |
| Answer» SOLUTION :Every object in the universe ATTRACTS every other object with a FORCE. This force is CALLED gravitational force. | |
| 5245. |
Differentiate between a glass slab and a glass prism. What happens when a narrow beam of (i) a monochromatic light, and (ii) white light passes through (a) glass slab and (b) glass prism ? |
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Answer» Solution :In a glass slab the opposite refracting surfaces are parallel but in a glass prism it is not so. In a prism the TWO refracting surfaces are inclined at an angle. (i) When a narrow beam of monochromatic light passes through a glass slab, the emergent ray is parallel to the incident ray but slightly DISPLACED laterally. In a prism the emergent ray bends at an angle to the direction of incident ray. (ii) When a narrow beam of white light passes through a glass slab, emergent beam is still parallel to incident beam but lateral displacement is DIFFERENT for different COLOURS. When a narrow beam of white light passes through a prism, it is splitted in to its constituents seven colours besides BENDING. |
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| 5246. |
Voltmeter : potential difference :: _____________ : direction of current. |
| Answer» SOLUTION :GALVANOMETER | |
| 5247. |
Why did newton assume inverse square dependence on distance in his law of gravitation? |
| Answer» Solution :Newton had assumed inverse square dependence on distance in his law of gravitation by considering kepler's THIRD law which state that , 'The square of orbital period of revolution OFA planet around the SUN is directly PROPORTIONAL to the cube of the mean distance of the planet from the sun' i.e., `T^2 PROP r^3` | |
| 5248. |
What is polar orbit ? |
Answer» Solution :The geostationary SATELLITES ORBIT above the EQUATOR. These are, therefore, not useful in the study of polar regions. For this purpose, elliptical medium earth orbits PASSING over the polar region are used. These orbits are CALLED polar orbits. 
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| 5249. |
What are the different ways of heat transfer? |
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Answer» Solution :There are 3 types of heat tansfer: 1. Conduction. 2. Convection. 3. Radiation. 1. Conduction is the transfer of heat energy by DIRECT contact without the ACTUAL movement of the medium particles. It takes place in solids only. E.g. Heating of iron rod at one end. 2. Convection is the transfer of heat energy by the actual movement of the medium particles. It takes place influids. E.g. Heating of water in a vessel. 3. Radiation is the transfer of heat energy with the help of electromagnetic waves. The earth receives heat from the SUN by radiation here medium is not required. It can take place in solids, LIQUIDS, GASES and in vacuum. 
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| 5250. |
What are factors affecting the resistance of an electric conductor ? Explain any two factors. |
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Answer» Solution :The factors affecting the resistance of an ELECTRICAL conductor are 1. Natural of material 2. TEMPERATURE 3. Length of the conductor 4. Area of CROSS section of conductor Explanation : 1. As the temperature increases the resistance increases and vice versa. 2. As the material changes resistance changes. 3. Resistance is directly proportional to length of the conductor (if T and A are constant) `Ralpha1` 4. Resistance is inversely proportional to area of cross section (if 1 and T are KEPT constant) `Ralpha(1)/(A)` |
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