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.
| 1551. |
Match the following.{:(,"Contraceptives",,"Type"),(A.,"Multiload 375",(i),"Oral intake"),(B.,"Saheli",(ii),"mechanical"),(C.,"Tubectomy",(iii),"IUD"),(D.,"Valut",(iv),"Surgical"):} |
|
Answer» |
|
| 1553. |
Whatarethe differences between binary fission and multiple fission |
Answer» SOLUTION : 
|
|
| 1554. |
Earthquake in recent times : Gujarat,Latur : : Devastating floods in 2018 : …………… |
| Answer» SOLUTION :Kerala/Assam | |
| 1555. |
Calculate the amount of energy released when a radioactive substance undergoes fusion and results in a mass defect of 2 kg. |
|
Answer» Solution :MASS defect in the reaction (m) = 2 kg Velocity of light (c)= `3 xx 10^(8)ms^(-1)` By Einstein.s EQUATION, Energy released `E= mc^(2)` So `E= 2 xx ( 3 xx 10^(8))^(2)` `= 1.8 xx 10^(17)J` |
|
| 1556. |
Two springs A and Bare identicalto each other. The spring A is harder than thespring B . On which spring morework will bedoneif they are stretched by same force ? |
|
Answer» SOLUTION :`W=1/2 KX^(2)` `:.(W_(A))/(W_(B))=(K_(A))/(K_(B))` for same X As `K_(A)gtK_(B)` so `W_(a)gtW_(B)` |
|
| 1557. |
What will be the effect on paddy crop? |
| Answer» SOLUTION : If the population of frog declines, then there will be RISE in the population of grasshoppers. The paddy FIELDS will hence be infested with INSECT pests. | |
| 1558. |
a] State Ohm's law. Write it in the form of equation and give graphical representation for it. b] An electric oven rated at 500W is connected to a 220V line and used for 2 hours daily. Calculate the cost of electric energy per month at the rate of Rs. 5 per kWh. |
|
Answer» Solution :a] Ohm.s Law: Current through a conductor between TWO points is directly PROPORTIONAL to the voltage across the two points. Mathematically, `VpropI` or V = RI where R is the constant of proportionality called resistance.  If a graph of current across a conductor along y-axis is plotted against the potential difference across it taken along x-axis for different values of potential difference, then, it looks as shown in the figure. The graph will be a straight line which confirms that potential difference V is directly proportional to current I according to Ohm.s law. b] Power of the oven [P] = 500 W = 0.5 kW t[time] = 2hrs E = `Pxxt=0.5xx2=1kWh` Energy consumed in 1 month = `1kWhxx30=30kWh` 1 kWh = Rs. 5 Cost for 30 DAYS = `5xx30` = Rs. 150.00 |
|
| 1559. |
The magnification of the image produced by a plane mirror is +1. Given reasons. |
|
Answer» Solution :In a plane mirror, object size (h) is equal to image size (h.). ALSO the object DISTANCE (u) is equal to the image distance (v). Object distance (u) is negative, while the image distance (v) is POSITIVE. For VIRTUAL image, v is + ve `m=(h.)/(h)=(h)/(h)=+l` or `m=-(v)/(u)=-(v)/((-u))=-(v)/(u)=+l` |
|
| 1560. |
Why are equivalent bulbs filled with chemically inactive nitrogen or argon gas? (b) The resistance of a wire of 0.01cm radius is 10 Omega. If the resistivity of the material of the wire is 50 times 10^-8 Omega.m Find the length of the wire. |
|
Answer» Solution :Electric bulbs are GENERALLY filled with some inert GAS like NITROGEN or argon. This enables to prolong the life of the filament of electric bulb. (b) Here radius of wire r=0.01 cm =`0.01 times 10^-2 m` resistance R=`10 Omega` and resistivity `rho=0 times 10^-8 Omega.m` As `R=(rho L)/A=(rho L)/( pi r^2)`, hence length `L=(R pi r^2)/( rho)` `implies L= (10 times 22 times (0.01 times 10^-2)^2)/(7 times 50 times 10^-8)=22/35 m=0.629m or 62.9 cm` |
|
| 1561. |
Assertion: The velocity of sound increases with increase in humidity. Reason : Velocity of sound does not depend upon the medium. |
|
Answer» Both ASSERTION and reason are true and the reason is the correct EXPLANATION of the assertion. |
|
| 1562. |
Whenever the number of magnetic lines of force passing through the coil changes, current is ............ in the coil |
| Answer» SOLUTION :INDUCED | |
| 1563. |
Fermentation is |
| Answer» SOLUTION :Conversion of PYRUVIC ACID produced in the proces of GLYCOLYSIS into other ORGANIC acids or alcohol with the help of some enzymes is called fermentation. | |
| 1564. |
The rheostate is used in the circuit to: |
|
Answer» increase the magnitude of the current |
|
| 1565. |
A car when passes through a bridge exerts a force on it which is equal to |
|
Answer» `MG+(MV^(2))/(T)` |
|
| 1566. |
When is the magnitude of (vecA+vecB) equal to the magnitude of (vecA-vecB) ? |
| Answer» SOLUTION :When `VECA` is PERPENDICULAR to `VEC B`. | |
| 1567. |
Where will bethe valueof magneticfield maximum due to current -carryingcircular conductor ? |
| Answer» SOLUTION :At THECENTREOF CURRENT- carryingcircular LOOP. | |
| 1568. |
Arrange in ascending and descending order, on the basis of their Ionisation power. Alpha (alpha), Beta (beta), Gamma (gamma) |
|
Answer» SOLUTION :ASCENDING ORDER : Alpha (`alpha`), Beta (`beta`), Gamma (`gamma`) DESCENDING order : Alpha (`alpha`), Beta (`beta`), Gamma (`gamma`) |
|
| 1569. |
A coil of insulated wire is connected to a galvanometer. What would be observed if a strong bar magnet with its south pole towards one face of the coil is (i) moved quickly toward it ? (ii) moved quickly away from it ? (iii) held stationary, near it ? |
|
Answer» Solution :(i) GALVANOMETER GIVES a deflection in ONE direction. (ii) Galvanometer gives deflection in opposite direction. (III) Galvanometer gives no deflection at all. |
|
| 1570. |
Which of the following statements does not represent Ohm's law? |
|
Answer» CURRENT/POTENTIAL DIFFERENCE = constant |
|
| 1571. |
Name the award instituted by Government of India in memory of Amrita Devi Bishnoi. Why it was launched. |
|
Answer» Solution :Amrita Devi Bishnoi AWARD for WILDLIFE conservation.. In 1731 she SACRIFICED her LIFE along with 363 others for the protection of Khejri trees in Khejrale village. |
|
| 1572. |
A ball at rest is dropped from a height of 12m. It loses 25% of its kinetic energy in striking the ground, find the height to which it bounces. How do you account for the loss in kinetic energy ? |
|
Answer» SOLUTION :If BAL BOUNCES to height H' then `mgh'=75%` of mgh `:. h=0.75h=9m` |
|
| 1573. |
As per new Cartesian coordinate system for spherical mirrors the focal length of a concave mirror is assigned a __________ sign and that of a convex mirror is assigned a __________ sign. |
|
Answer» |
|
| 1574. |
What is mean by specific heat capacity ?[OR Define specific heat capacity.] How will you prove experimentallythat different substances have different specific heat capacities ? |
|
Answer» Solution :The amount of heat energyrequired to raise the TEMPERATURE of a unit mass of an object by `1^(@)C ` is called the SPECIFIC heat capacity of that object. Material `:` A tray with thick laywer of wax, solid SPHERES of iron, lead and copper of equal mass, burner or spirit lamp, large beaker. Procedure `:` (1) Take three spheres of iron, copper and lead of equal mass. (2) Put all the three spheres in BOILINGWATER in the beaker for some time.  (3) Take the three sphere out of water. All the spheres will be at temperature `100^(@)C `. Put them immediately on the thick SLAB of wax. (4) Note, the depth that each of the sphere goes into the wax. The sphere which absorbs more heat from the water will give more heat to wax. More wax will thus melt and the sphere will go deeper in the wax. It can be observed that the iron sphere goes deepest into the wax. Lead sphere goes the least and copper sphere goes to intermediate depth.This shows that for equal rise in temperature , the three spheres have absorbed different amounts of heat. This means the property which determines the amount of heat absorbed by a sphere is differentfor the three spheres. This is property is called the specific heat capacity. |
|
| 1575. |
Electric current passes in a circuit from the ____________ to _____________ terminal. |
| Answer» SOLUTION :POSITIVE , NEGATIVE | |
| 1576. |
Suppse a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of 10ms^(-1) . It implies that the boy is |
|
Answer» at rest |
|
| 1577. |
Defineatomicity . |
| Answer» SOLUTION :The number of atoms PRESENT in the MOLECULE is called its .ATOMICITY | |
| 1578. |
Locomotion is considered as an important characteristic of the animals. However, animals belonging to Porifera are said to be sedentary. Every other phylum has typical locomotory organs. E.g. Nereis crawls with the help of parapodia, walking legs, crab has five while all insects have three pairs of walking legs. The walking legs are also called appendages. Starfish moves with the help of tube feet. Snails and bivalves use muscular foot for locomotion. Birds flying with their spread out wings and fish swimming with their fins, both have spindle-shaped body tapering at both the ends. While flying or swimming such body offers least resistance during locomotion. Mammals have two pairs of limbs while animals like snakes are limbless. Other animals belongin to the class of snakes also have very weak limbs which make them creep on the ground. In which class of animals are the forelimbs modified? |
| Answer» SOLUTION :CLASS Aves belonging to subphylum vertebrata have wings which are MODIFIED FORELIMBS. | |
| 1579. |
An object is held at a distance of 60 cm from a convex mirror of focal length 20 cm. At what distance from the convex mirror, should a plane mirror be held so that images in the two mirrors coincide? |
Answer» Solution :For convex mirror, `U = -60 cm, f = +20 cm`.  From mirror formula,`(1)/(v) =(1)/(f) - (1)/(u) = (1)/(20) + (1)/(60) = (3+1)/(60) = (1)/(15)` `v = 15 cm`.`:. PI=15 cm`. LET the PLANE mirror be held at `M` so that images in the two mirrors coincide. As `OM = MI = MP+PI = x+15` and `OM = (1)/(2)OI = (1)/(2)(60+15) = 37.5 cm`. `:. x + 15 = 37.5, x = 37.5-15 = 22.5 cm`. |
|
| 1580. |
Locomotion is considered as an important characteristic of the animals. However, animals belonging to Porifera are said to be sedentary. Every other phylum has typical locomotory organs. E.g. Nereis crawls with the help of parapodia, walking legs, crab has five while all insects have three pairs of walking legs. The walking legs are also called appendages. Starfish moves with the help of tube feet. Snails and bivalves use muscular foot for locomotion. Birds flying with their spread out wings and fish swimming with their fins, both have spindle-shaped body tapering at both the ends. While flying or swimming such body offers least resistance during locomotion. Mammals have two pairs of limbs while animals like snakes are limbless. Other animals belongin to the class of snakes also have very weak limbs which make them creep on the ground. Which phylum has a characteristic of jointed appendages? |
| Answer» Solution :PHYLUM ARTHROPODA has a charateristic of JOINTED appendages. | |
| 1581. |
Locomotion is considered as an important characteristic of the animals. However, animals belonging to Porifera are said to be sedentary. Every other phylum has typical locomotory organs. E.g. Nereis crawls with the help of parapodia, walking legs, crab has five while all insects have three pairs of walking legs. The walking legs are also called appendages. Starfish moves with the help of tube feet. Snails and bivalves use muscular foot for locomotion. Birds flying with their spread out wings and fish swimming with their fins, both have spindle-shaped body tapering at both the ends. While flying or swimming such body offers least resistance during locomotion. Mammals have two pairs of limbs while animals like snakes are limbless. Other animals belongin to the class of snakes also have very weak limbs which make them creep on the ground. What are the locomotory organs in phylum Annelida? |
| Answer» SOLUTION :Annelidans have PARAPODIA and SETAE as the LOCOMOTORY ORGANS. | |
| 1582. |
Locomotion is considered as an important characteristic of the animals. However, animals belonging to Porifera are said to be sedentary. Every other phylum has typical locomotory organs. E.g. Nereis crawls with the help of parapodia, walking legs, crab has five while all insects have three pairs of walking legs. The walking legs are also called appendages. Starfish moves with the help of tube feet. Snails and bivalves use muscular foot for locomotion. Birds flying with their spread out wings and fish swimming with their fins, both have spindle-shaped body tapering at both the ends. While flying or swimming such body offers least resistance during locomotion. Mammals have two pairs of limbs while animals like snakes are limbless. Other animals belongin to the class of snakes also have very weak limbs which make them creep on the ground. Which class of animals show weak legs? |
| Answer» Solution :Class REPTILIA BELONGING to subphylum vertebrata SHOW WEAK LEGS. | |
| 1583. |
Locomotion is considered as an important characteristic of the animals. However, animals belonging to Porifera are said to be sedentary. Every other phylum has typical locomotory organs. E.g. Nereis crawls with the help of parapodia, walking legs, crab has five while all insects have three pairs of walking legs. The walking legs are also called appendages. Starfish moves with the help of tube feet. Snails and bivalves use muscular foot for locomotion. Birds flying with their spread out wings and fish swimming with their fins, both have spindle-shaped body tapering at both the ends. While flying or swimming such body offers least resistance during locomotion. Mammals have two pairs of limbs while animals like snakes are limbless. Other animals belongin to the class of snakes also have very weak limbs which make them creep on the ground. Which |
| Answer» SOLUTION :ANIMALS belonging to Phylum Mollusca have strong muscular FOOT which is USED for locomotion. | |
| 1584. |
Explain why, the ceilings of concert halls are curved. |
|
Answer» Solution :(i) These are basically curved surfaces (concave), which are used in auditoria and HALLS to improve the quality of SOUND. This board is placed such that the speaker is at the focus of the concave SURFACE. (ii) The sound of the speaker is reflected TOWARDS the audience thus improving the quality of sound HEARD by the audience. |
|
| 1585. |
Name the eye defect in which eye lens becomes cloudy or milky. Mention the method for its correction. A person uses a lens of power -1.0 D for correcting his distant vision and for correcting his near vision he uses a lens of power + 2.0 D. Calculate the focal length of the lenses required to correct these defects. Explain why a normal eye is not able to see clearly the objects placed closer than the near points. |
|
Answer» SOLUTION :(i) Sometime, the crystalline lens of people at old age becomes milky and cloudy. This condition is called cataract. This causes partial or complete loss of VISION. It is possible to restore vision through a cataract surgery. (II) Focal length for lens for distance vision `=-(1)/(1)=-1m` Focal length for lens for near vision `=+(1)/(2)=+0.5m` (iii) The focal length of eye lens cannot be decreased below a CERTAIN minimum limit. If we try to read a printed page by holding it very close to our eyes, we MAY see the image being blurred or feel strain in the eye. To see an object comfortably and distinctly, we must hold it at about 25 cm from the eyes. |
|
| 1586. |
Which of the two is more energy efficient : filament type electric bulb of CFL ? Why ? |
|
Answer» |
|
| 1587. |
Describe the experiment to explain that force acts on a current carrying conductor in presence of a magnetic field. |
|
Answer» Solution :Materials : Flexible copper wire, stand, electric cell, a horse shoe magnet with a strong magnetic field. Procedure : Using the stand, fix the copper wire so that it passes through the poles of the horse shoe magnet. CONNECT the wire to the BATTERY to complete the circuit Observation :Whenever a current is not FLOWING through the wire, it remains straight (POSITION A). 2. When the current FLOWS from top to bottom, the wire bends and comes into position C. 3. If the current direction is reversed, i.e. it flows from the bottom to the top end, the wire bends but comes in the position B. 4. This means the direction of the force on the wire is perpendicular to both the magnetic field and the direction of the current. 5. Here, the direction of magnetic field is from N to S, (H). Conclusion : 1. In this experiment, it is noted that whenever current flows through a conductor in the presence of magnetic field a force is exerted on the conductor. 2. If the direction of the current is reversed, the direction of the force also gets reversed. 3. The direction of this force depends on both the direction of the current and the direction of the magnetic field. 
|
|
| 1588. |
Identify the process shownin figure and name it |
| Answer» Solution :The above figure shows NUCLEAR fission CHAIN URANIUM- 236. | |
| 1589. |
An object of size 7.0cm is placed at 27cm is front of a concave mirror of focal length 18cm. At what distance from the mirror should a screen be placed, so that a sharp focused image can be obtained? Find the size and the nature of the image. |
|
Answer» Solution :Object distance,u=-27cm Object height, h=7cm Focal length, f=-18cm According to the mirror FORMULA `1/v-1/u=1/f` `v=1/f-1/u` `(-1)/(18)+1/(27)=(-1)/(54)` `v=-54cm` The SCREEN should-be placed at a distance of 54 CM in front of the given mirror. Magnification, `m=("Image distance")/("Object distance")=(-54)/(27)=-2` The NEGATIVE value of magnification indicates that the image FORMED is real. Magnification, m`=("Height of the image")/("Height of the Object")=(h_1)/h` `h.=7xx(-2)=-14cm` |
|
| 1590. |
Theforce of gravitation is: |
|
Answer» REPULSIVE |
|
| 1591. |
Explain whether an alpha particle will experience any force in a magnetic field if : (i) it is placed in the field at rest. (ii) it moves in the magntic field parallel to field lines. (iii) it moves in the magnetic field perpendicular to field lines. |
|
Answer» Solution : (i) No, because, a charged particle at rest does not INTERACT with magnetic field. (ii) No, because, the force is zero if CURRENT and field are in the same DIRECTION. (III) YES, because, the force is maximum when current and magnetic field are maximum . |
|
| 1592. |
Calculate the focal length of a lens, if its power is - 2.5 D |
|
Answer» Solution :POWER of a lens P = - 2.5 D `THEREFORE`Focal LENGTH of lens F = `(1)/(p)=(1)/(2.5)` m =-0.40 m or - 40 CM |
|
| 1593. |
What is thefunction of an earth wire ? Why isit necessary to earthmetallicappliances ? |
| Answer» Solution :Function of anearth WIRE: The function of an earth wire is toprovidea low-resistanceconductingpath to the currentleakingfrom an electricalapplianceto theearth and THEREBY perventelectric shock to THEUSER of theelectrical APPLIANCE . | |
| 1595. |
Draw a labelled circuit diagram of a simple electric motor and explain its working . In what why are thesesimple electric motorsdifferent fromcommercial motors ? |
| Answer» Solution :Commercial motors differ form the MOTOR explained above in the following aspects : (i) anelectromagnet replaces permanent magnet, (ii)the coil consists of a LARGE NUMBER of TURNS,and (iii) the coil is wouldon a soft iron core. The coil and the core are together knownas armature and they enhance therotationspeed of the motor . | |
| 1596. |
The focal length of the eye lens increases when eye muscles |
|
Answer» are relaxed and LENS BECOMES thinner |
|
| 1597. |
Advantage of mitosis : |
|
Answer» Solution :(1) ESSENTIAL for the growth of the body (2) NECESSARY for RESTORATION of emaciated body (3) For wound healing (4) For the FORMATION of blood cells, ETC. |
|
| 1598. |
The scale of an ammeter is shown below : The least count of this ammeter is : |
|
Answer» `0.05 A` |
|
| 1599. |
The average kinetic energy of a gas molecule at 27^(@)C is 621xx10^(-1)J. The average kinetic energy of gas molecule at 227^(@)C will be |
|
Answer» `52.2xx10^(-21)J` |
|
| 1600. |
The scale of an ammeter is shown below : The least count of this ammeter is : |
|
Answer» 0.1 A |
|