InterviewSolution
Saved Bookmarks
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.
| 4251. |
Observe the diagram given and answer the question asked. a. Indentify the eye defect. |
Answer» SOLUTION :The eye DEFECT is Hypermetropia. Hypermetropia or farsightedness is the defect of VISION, in which human eye can see DISTANT objects clearly but is unable to see NEARBY objects distictly.
|
|
| 4252. |
In the circuit shown power dissipated in 12 Omegaresistance is 6 watt. What is the power dissipated in the 8 Omega resistance. |
|
Answer» SOLUTION :In PARALLEL arrangement voltage V remains same and `P_1/P_2=R_2/R_1` `THEREFORE ` Power in `8 Omega` resistance `P_2=(P_1R_1)/R_2=(6 times 12)/8=9W` 
|
|
| 4254. |
Hydroelectric energy, solar energyand wind energy are called renewable energies. OR Hydroelectric energy, solar energy and wind energy are called renewable energies. Why? |
|
Answer» Solution :i. The sources of energy which are being produced CONTINUOUSLY in nature and are inexhaustible i.e they are always AVAILABLE for USE are CALLED renewable sources of energy. ii. Hydroelectric energy solar energy , wind energy are produced from energy sources like water ,sunlight and wind respectively that are produced continuously in nature and will not get DEPLETED. Thus, hydroelectric energy solar energy and wind energy are called renewable energies. |
|
| 4255. |
How do you find the rough focal length of a convex lens ? Is the same method applicable to a concave lens? |
|
Answer» Solution :The rough focal length of a CONVEX lens is obtained by FORMING sharp image of a very distant object ona screen. The DISTANCE of the screen from the lens GIVES us the rough focal length of the lens. This method is not applicable to a concave lens, as image formed by a concave lens is virtual and it can be TAKEN on a screen. |
|
| 4257. |
An electric bulb is rated 220 V and 100 W. When it is operated on I 10 V, the power consumed will be- |
| Answer» Answer :B | |
| 4258. |
Why do stars appear higher than they actually are ? |
| Answer» Solution :It is on ACCOUNT of ATMOSPHERIC refraction from UPPER RARER layers to lower denser layers of atmospheric. | |
| 4259. |
What is meant by the statement that the resistance of a wire is 1 Omega ? |
| Answer» SOLUTION :When 1 AMPERE current flows through a conductor WHOSE potential DIFFERENCE is 1 volt, then resistance is 1 ohm. | |
| 4260. |
A positively - charged particles (alpha - particle) projected towards west is deflected towards north by a magnectic field. The direction of magnetic field is |
|
Answer» TOWARDS SOUTH |
|
| 4261. |
Give two examples of dimension less variables. |
| Answer» SOLUTION :STRAIN, REFRACTIVE INDEX. | |
| 4262. |
The radii of two planets are R and 2R respectively and their densities p and p"/"4 respectively. What is the ratio of acceleration due to gravity at their surfaces? |
|
Answer» <P> Solution :Here `G=(GM)/(R^2)=(G)/(R^2)*(4)/(3)piR^3p`or `g propto Rp` `:. ""(g_1)/(g_2)= (R_p)/(2R*(p)/(4))=2 : 1`. |
|
| 4263. |
A ball of mass 20 g falls from a heightof 10 m and after striking the ground.It rebounds from the ground to a height of 8 m .(a) Calculate: (i)The kinetic energy of the ball just before striking the ground ,and (ii)The loss in kinetic energy of the ball on striking the ground,and (ii)the loss in kinetic energy of the ball on striking the ground. (b)What happens to the loss in kinetic energy in part(ii) ? Take g=10 m s^(-2) Neglect air friction . |
|
Answer» Solution :(a)Given m =20 g =0.02 kg, h=10 m g=10 m `s^(-2)` h. =8 m .Air friction is negligible. (i)The kinetic energy OG ball just befire striking the ground =mitial potential energy of ball Potential energy of the ball at the HIGHEST point the REBOUND =`mgh=0.02xx10xx8=1.6 J` `THEREFORE` Loss in kinetic energy on striking the ground |
|
| 4264. |
The ionizing power of alpha rays is 100 times greater than ___________. |
| Answer» SOLUTION :`BETA` -RAYS | |
| 4265. |
The mirror used by a dentist to examine the teeth of a person is : |
|
Answer» convex |
|
| 4266. |
In a longstraightsolenoid N - and S- poles are created atthe twoends of thesolenoid . Whichof thefollowingstatementsis incorrect? |
|
Answer» Thefield lines the solenoidare in THEFORM straightlines indicatingthe magneticfield is sameat all pointsinside the solenoid . |
|
| 4267. |
Give your opinion about wheather hydroelectric plants are environment-friendly or not? |
|
Answer» Solution :(1) Hydroelectric plants are advantageous in some respect while in some aspects it does create problems. (2) Hydroelectric power generation does not need burning of fuels. Therefore, there is no problem regarding combustion of fuels and release of toxic pollutants. (3) Electricity can be obtained as and when REQUIRED if there is enough water in the reservoir. (4) Water is replenished every TIME when there is sufficient rainfall. (5) All the above facts give an impression that hydroelectric power genetation is eco-friendly but it is not. (6) Many villages and settlements are submerged when a dam and reservoir is constructed. The displaced people are given re-settlement, but it causes lot of emotional trauma to people. (7) Biodiversity is affected as forest lands is submerged. The river FLOW is obstructed by the dam which affects the aquatic ORGANISMS residing in such water. (8) Due to excessive pressure of water on land, it is said that the region gets prone to earthquakes. |
|
| 4268. |
Find the minimum resistance that can be made using five resistors, each of 5 Omega. |
|
Answer» Solution :By CONNECTING given resistors in PARALLEL, RESISTANCE `1 Omega` is OBTAINED which is the minimum. `R_p = R/n = (5Omega)/5 = 1Omega` |
|
| 4269. |
A point object 'O' on the principal axis of a spherical surface of radius of curvature 'R' separating two media of refractive indices n_(1) and n_(2) forms an image 'I' as shown in the figure below. Prove that (n_(2))/(v)-(n_(1))/(v)=(n_(2)-n_(1))/(R) |
|
Answer» |
|
| 4270. |
Why do you wait for periods of music, P.T., drawing in the classroom? |
|
Answer» Solution :1. Periods of music, P.T., drawing etc. have more activities and ENJOYMENT than other periods. 2. Learining, singing and LISTENING to music KEEPS us happy and drives away the stress. 3. We enjoy P.T. period because outdoor games and physical exercise make us fresh, disciplined, united and SOCIAL. 4. Drawing and painting improves our creativity, IMAGINATION, momory, communication skills and also relieves our stress. 5. Therefore, we children wait for these periods in the classroom. 
|
|
| 4271. |
(a) Give reasons for the folowing : (i) Colour of the clear sky is blue. (ii) The sun be seen about two minutes before actual sunrise. (iii) We cannot see an object see an object clearly if it is placed very close to the eyes. (b) What is presbyopia ? Write two causes of this defect. |
|
Answer» Solution :(a) (i) Blue colour of sky is due to Rayleigh elastic scattering of sunlight. Light from the sun, while travelling through earth's atmosphere, gets scattered from LARGE number of air molecules in the atmosphere. As size of molecules is `~~ 10^-10 m`, which is much less than WAVELENGTH of light, therefore Rayleigh scattering occurs. As blue colour has the SMALLEST wavelength, it is scattered the most. That is why sky looks blue. (ii) N/A (iii) For a normal EYE, the MINIMUM distance |
|
| 4272. |
Which of the following is not an example of a biomass energy source? |
|
Answer» Wood |
|
| 4273. |
State Ohm's law? How can it be verified experimentally? Does it hold good under all conditions? Comment. |
|
Answer» Solution :According to Ohm.s law the electric current flowing through a CONDUCTOR is directly proportional to the potential difference applied across its ends provided the physical conditions such as temperature etc remains unchanged. Let V be the potential difference applied across the ends of conductor through which current I flows, then according to Ohm.s law. V proportional to `ItoV=IR` Ohm.s law can be verified experimentally by the ACTIVITY given below: i] Firstly, set up a circuit as shown in figure given below, consisting of a nichrome wire XY of length, say 0.5 m, an ammeter, a voltmeter and four cells of 1.5 V each. [Nichrome is an alloy of nickel,chromium, manganese, and iron metals.]  ii] FIRST use only one cell as the source in the circuit. Note the reading in the ammeter I, for the current and reading of the voltmeter V for the potential difference across the nichrome wire XY in the circuit. Tabulate them in the Table given.  iii] Next connect two cells in the circuit and note the respective readings of the ammeter and voltmeter for the values of current through the nichrome wire and potential difference across the nichrome wire. iv] Repeat the above steps using three cells and then four cells in the circuit separately. v] Calculate the ratio of V to 1 for each pair of potential difference V and current I. VI] Plot a graph between V and I. The graph will be a straight line as shown below.  VII] This verifies the Ohm.s law. |
|
| 4274. |
The function of control rods is to absorb the part of the K.E. of the neutrons. |
| Answer» SOLUTION :The FUNCTION of MODERATOR is to absorbthe PART of the K.E of the NEUTRONS. | |
| 4275. |
How can it be shown that magnetic field exists around a wue carrying current ? |
| Answer» SOLUTION :By USING magnetic compass, that SHOWS DEFLECTION. | |
| 4276. |
Based on the given diagram answer the questions given below : State the functions of B and C in the process of reproduction. |
|
Answer» Solution :FUNCTION of : Seminal vesicle : Provides fluid MEDIUM for TRANSPORT of sperms. Urethra : Responsible for passage of urine and SPERM to outside the male body |
|
| 4277. |
Which is formed during anaerobic respiration |
|
Answer» CARBOHDRATE |
|
| 4278. |
What are Rods and Cones? |
| Answer» Solution :Rods and cones are light SENSITIVE CELLS present in the RETINA. Rods control the INTENSITY of light, while Cones control the colour perception | |
| 4280. |
Hydrogen has been used as a rocket fuel, would you consider it a clear fuel than CNG? Why or why not? |
| Answer» Solution :Hydrogen can be CONSIDERED a clear FUEL because its BURNING produces water vapour which is non POLLUTING. However due to explosive nature ofhydrogen its STORAGE and transportation is difficult. | |
| 4281. |
Two coils of insulated copper wire are wound over a non-conducting cylinder as shown. Coil 1 has comparative large number of turns. State your observations, when(i) Key K is closed.(ii) Key K is openedGive reason for each of your observations. |
|
Answer» Solution :(i) When key K is closed, GALVANOMETER G gives a momentary deflection in a particular direction. On closing key K, a current starts flowing through coil 1 and a magnetic field is produced. As magnetic field linked with coil 2 increases, an induced voltage is SET up for a moment in coil 2 due to phenomenon of ELECTROMAGNETIC induction. (ii) On opening key K, the galvanometer G again gives a momentary deflection WHOSE direction is opposite to that in (i). On opening key K current flowing through coil 1 stops and so magnetic field of coils decreases. As a result, again an induced voltage is obtained in coil no 2. |
|
| 4282. |
What are the disadvantages of fuels ? |
|
Answer» Solution :(i) The fossil FUELS are non - renewable sources of energy . If we were to continue consuming these sources at such an alarming rate , we would soon run out of energy . (ii) Air pollution is caused by BURNING fossil fuels. (iii) The oxides of carbon , NITROGEN and sulphur that are RELEASED on burning fossil fuels are ACIDIC oxides. These lead to acid rain which affects our water and soil resources. (iv) Carbon dioxide produced by burning these fuels produces greenhouse effect . |
|
| 4283. |
A teacher asked four students to record the observations of the experiment on tracing the path of a ray of light through a rectangular glass slab. The students recorded their observations under the following headings : (1) Angle of incidence, Angle of refraction, Angle of reflection (2) Angle of incidence, Angle of deviation, Angle of emergence (3) Angle of incidence, Angle of reflection, Angle of emergence (4) Angle of incidence, Angle of refraction, Angle of emergence The correct observations were recorded by the student : |
|
Answer» A |
|
| 4284. |
Which phenomenon of light is respon-sible for twinkling of stars |
|
Answer» |
|
| 4285. |
The following pieces of apparatus are available in a laboratory : Battery : adjustable from 0 to 6 V Resistors : 3 Omega and 6 Omega Ammeters : A_1 of range 0 to 5 A , least count 0.25 A A_2 of range 0 to 3 A , least count 0.1 A Voltmeters : V_1 of range 0 to 10 V , least count 0.5 V v_2 of range 0 to 5 V , least count 0.1 V For the experiment to find the equivalent resistance of the parallel combination of the two given resistors,which is the best choice ? |
|
Answer» AMMETER `A_(1)` and voltmeter `V_(2)` |
|
| 4286. |
An electric heater of resistance 5 Omega is connected to an electric source. If a current of 6 A flows through the heater, then find the amount of heat produced in 5 minutes. |
|
Answer» Solution :GIVEN RESISTANCE `R=5Omega`, CURRENT `I=6A`, Time `t=5` MINUTES `=5xx60s=300s` Amount of heat produced, `H=I^(2)RT` `H=6^(2)xx5xx300`. Hence, `H=54000J` |
|
| 4287. |
Define the radius of curvature of a spherical mirror. Find the nature and focal length of a spherical mirror whose radius of curvature is 24 cm. |
|
Answer» SOLUTION :The radius of the sphere from which the mirror is made is called the Radius of CURVATURE [r] of the spherical mirror. The radius of curvature is a LINE joining any point on the reflecting SURFACE of the mirror to the centre of the mirror [C]. r = 2 [focal length of the spherical mirror] `r=+24 cm = 2f "" f=+12 cm` The spherical mirror is a CONVEX mirror. |
|
| 4288. |
Though I am multicellular , there are no tissue in my body . What is the name of my phylum ? |
| Answer» SOLUTION :SPONGE , Portifera. | |
| 4290. |
An element 'X' has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong. |
|
Answer» group1 |
|
| 4291. |
Mechanics is divided into kinematics and kinetics. |
|
Answer» |
|
| 4292. |
The image formed by retina of human eye is |
|
Answer» REAL and erect |
|
| 4293. |
What is hermaphrodite? |
|
Answer» Solution :(i) Hermaphrodite: If the male and female reproductive organs are present in the same individual, it is CALLED hermaphrodite animal. Eg. Leech. (ii) The SUPERIORITY of the hybrid obtained by cross breeding is called as heterosis or hybrid vigour. Its effects in animal breeding are: (a) Increased production of milk by CATTLE (B) Increased production of EGG by poultry. (c) High quality of meat is produced. (d) Increased growth rate in domesticated animals. |
|
| 4294. |
Can any source of energy be pollution-free ? |
| Answer» Solution :No source of energy can be called POLLUTION FREE. It is because, the use of any source of energy will disturb the ENVIRONMENT in one or the other WAY. For example, solar cell. It is free of pollution but its installation MAY cause some damage to the environment. | |
| 4295. |
What will happen ifmucus is not secreted by the gastric glands |
| Answer» Solution :MUCUS is secreted it along with HCl so as to protect the INNER lining of stomach from excoriation HCl produced is very strong and can Corrode the gastric lining. But for the presence of mucus, it does not REACH the lining. Thus mucus is very ESSENTIAL in protecting the stomach wall. | |
| 4296. |
LED TV screen was developed by James P Mitchell in. . . . .. . . . . . |
|
Answer» 1797 |
|
| 4297. |
Which of the following is NOT a gaseous cycle ? |
|
Answer» PHOSPHORUS CYCLE |
|
| 4298. |
A bird sitting on a high power line |
|
Answer» gets KILLED instantly |
|
| 4299. |
Microbial inoculants: |
| Answer» Solution :(1) HELPING the PLANTS in their growth by providing ESSENTIAL nutrients. (2) Improving quality of vegetable/fruit matter. | |
| 4300. |
SI unit of electric current is………. And that of the potential difference is………. |
| Answer» SOLUTION :AMPERE, VOLT | |