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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.
| 8001. |
The filament is made up of a material whose . . . . .Is very high. |
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| 8002. |
Is there any evidence for the motion of charge in daily life situations ? |
| Answer» SOLUTION :YES, LIGHTNING is a LIVE EXAMPLE. | |
| 8003. |
Assertion: Air at some distance above the fire is hotter than the same distance side wise. Reason: Air surrounding the fire carries heat upward due to conventional current. |
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Answer» Both the ASSERTION and the reason are true and reason is the correct EXPLANATION of assertion. |
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| 8004. |
How many amu would make up 1 kg? |
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Answer» `6.0024 xx10^(26)` |
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| 8005. |
A student uses spectacles of focal length - 2.5 m. Which lens is used for the correction of this defect ? |
| Answer» Solution :A DIVERGING LENS is USED for the CORRECTION of this defect. | |
| 8006. |
For a given heat energy, the real expansion is always more than that of __________ expansion. |
| Answer» SOLUTION :APPARENT | |
| 8007. |
Which are the three aspects of disaster that are important for common citizens? |
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Answer» Solution :The phase of emergency, TRANSITIONAL phase and reconstruction phase are the three phases of disaster that are important for common citizens. (1) Phase of emergency: If timely and RAPID action is taken during this phase, maximum lives can be saved. Search and rescue operations, medical help, first ai.d, restoring communication services, REMOVING the people from. affected area are done during this phase. The gravity of disaster can be estimated during this phase. (2) Transitional Phase: The disaster subsides and then the work of transitional phase starts. The main concern is rehabilitation work for the affected and displaced people. This work includes clearing of debris, resto~ing water supply, repairing roads, etc. to bring normalcy in public life. Help from different voluntary and Government institute is taken to offer the monetary provision and essential commodities to affected victims. Permanent means of livelihood is given to the people to reduce their mental and emotional stress. The victims are truly rehabilitated. (3) Reconstruction Phase : Reconstruction phase is a highly complicated phase which actually overlaps with transition stage. Help is OFFERED to people to RECONSTRUCT their buildings. Other facilities like roads and water supply are restored. Farming practices are restarted. It is a very gradual phase that makes the victims to completely rehabilitate. |
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| 8008. |
Total energy radiated by Sun is about |
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Answer» `3.6 xx 10^(28) JS^(-1)` |
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| 8009. |
Get information about major wind power stations in India and their capacity. Make a table of their location, state and their power generation capacity in MW. |
Answer» SOLUTION : 
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| 8010. |
Yellow, Red, Orange, Brown |
| Answer» Solution :BROWN. All OTHERS are COLOURS produced in a rainbow, whereas brown colour is not a part of it. | |
| 8011. |
alpha-rays are ________ charged. |
| Answer» SOLUTION :POSITIVELY | |
| 8012. |
If a ball is thrown up in a moving train, it comes back to the thrower’s hands. Why ? |
| Answer» Solution :Both during its upward and DOWNWARD motion, the ball continues to move inertia of motion with the same horizontal VELOCITY as the train. In this period, the ball COVERS the same horizontal distance as the train and so it comes back to the THROWER’s hand. | |
| 8013. |
Based on the given diagram answer the questions given below : Label the parts A, B, C and D. |
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Answer» Solution :LABELLING : A - Ureter B - SEMINAL vesicle C - URETHRA D - VAS deferens |
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| 8014. |
Draw the diagram of the structure of a nephron. |
Answer» SOLUTION :
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| 8015. |
Why are electric bulbs filled with chemically inactive nitrogen or argon ? |
| Answer» SOLUTION :To PROLONG the LIFE of FILAMENT. | |
| 8016. |
The device used for converting electrical energy to mechanical energy is .......... |
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Answer» GALVANOMETER |
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| 8017. |
Draw the symbols of the following. Key |
Answer» SOLUTION :
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| 8018. |
Draw ray diagrams showing (i) myopia eye and (ii) hypermetropia eye. |
Answer» Solution :(i) Myopia is caused by ELONGATION of EYEBALL which results in FOCUSING of IMAGE in front of retina. Thus, the distant images are blurry but the nearby images are clear.  (ii) Hypermetropia is caused by an eyeball which is too SHORT, resulting in focusing of image behind the retina. In this case, distant images are clear but the near by images are blurry. 
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| 8019. |
A man getting out of a moving bus runs in the same direction for a certain distance. Comment. |
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| 8020. |
In the circuit diagram given in (a), suppose the resistors R_1,R_2 and R_3 have values 5 Omega, 10 Omega and 30 Omega respectively, which have been connected to a battery of 12 V. Calculate (a) the current through each resistor, (b) the total current in the circuit, and ( c) the total circuiot resistance. |
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Answer» Solution :(a) Since `R_1,R_2` and `R_3` are in parallel, the pd (V) across each ONE of them is the same, i.e., `12 V` Thus, `I_1 ("current through" R_1) = (V)/(R_1) = (12 V)/(5 Omega) = 2.4 A` `I_2 ("current through" R_2) = (V)/(R_2) = (12 V)/(10 Omega) = 1.2 A` `I_3 ("current through" R_3) = (V)/(R_3) = (12 V)/(30 Omega) = 0.4 A` (b) TOTAL current in the CIRCUIT, `I = I_1 + I_2 + I_3 = 2.4 A + 1.2 A + 0.4 A = 4 A` (c) If `R_p` is the total resistance in the circuit, then `(1)/(R_p) = (1)/(R_1) + (1)/(R_2) + (1)/(R_3) = (1)/(5) + (1)/(10) + (1)/(30) = (1)/(3)` or `R_p = 3 Omega` We can also find the total current by first calculating `R_p` and then USING, `I = (V)/(R_p)`, i.e., `I = (V)/(R_p) = (12 V)/(3 Omega) = 4 A`. |
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| 8021. |
Focal length of the eye lens can be adjusted by action of : |
| Answer» Answer :A | |
| 8022. |
What is the name given to change of path of light without any change of medium ? |
| Answer» SOLUTION :REFLECTION. | |
| 8024. |
Which different methods are used for transportation of patients during a disaster? Why? |
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Answer» Solution :For the transportation of patients following methods are used : (1) Cradle method : This method is used for children and persons with less WEIGHT. (2) CARRYING piggy back : This method is useful in carrying the unconscious persons. (3) Humancrutch method : If one leg of the person is injured, then the victim is supported with minimum load on the other leg. This is called human crutch method. (4) Pulling or lifting method : For carrying an unconsious person for a short distance this method is used. (5) Carrying on four- hand chair : This methodis used when the support is needed for a part below waist region. (6) Carrying on two-hand chair: Patients that connot use their hands but can hald their body UPRIGHT, are CARRIED by such method. (7) Stretcher : By making temporary stretcherin case of emergency, the unconscious patient can bemoved. Such temporary stretchers are made by using bamboos, blanket, ETC. |
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| 8025. |
........... are the example at artificial (or) man-made radioactive elements |
| Answer» SOLUTION :Borun, ALUMINIUM | |
| 8026. |
Why are coal and petroleum considered to be non renewable sources of energy? |
| Answer» Solution :Coal and petroleum are CONSIDERED non-renewable sources of ENERGY because they are not being formed continously in nature and are therefore not REPLENISHED CONTINUOUS use will result in their depletion | |
| 8027. |
As the density of a series of liquids increases, the upthrust on the iron rod submerged |
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Answer» increases |
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| 8028. |
Assertion: Alpha, beta and gamma radiations are emitted. Reason": Nuclear fission process can be performed at room temperature, |
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Answer» If both the assertion and the reason are true and the reason is the correct explanation of the assertion. |
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| 8029. |
You are given a convex lens of focal length 30 cm. At what distance from the lens should you hold a candle flame to observe. (a) a real and magnified image of the flame ? (b) a virtual and magnified image of the flame? ( c) a real, inverted and smaller image of the flame? |
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Answer» Solution :Here, `f=30 CM`. (a) To obtain, a real and MAGNIFIED image,object must lie between f and `2f`i.e.,DISTANCE of flame from the lens should lie between `30` and `60 cm`. ( b) To obtain a virtual image, object must lie between principal FOCUS and optical centre of the lens i.e.,distance of flame from the lens should lie between 0 and `30 cm`. (c ) To obtain, a real , inverted and SMALLER image of the flame, object must lie beyond `2 f` of the lens, i.e., the flame should be held at a distance be held at a more than `60 cm` from the lens. |
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| 8030. |
On what basis and how will you determine wether airis saturated with vapour or not? |
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Answer» SOLUTION :(i) We can determine whether air is saturated with vapour or not on the basis of relative humidity. (ii) Relative humidity is the ratio of actual mass of vapour CONTENT in air for GIVEN volume and temperature to that required to MAKE air saturated with vapour at that temperature. (iii) If relative humidity is 100%, the air is saturated with vapour. This is CALLED dew point. (iv) If its value is less than 100%, then air is unsaturated. |
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| 8031. |
A block of mass M is held against a rough vertical wall by pressing it with a finger . If the coefficient of friction between the block and the wall is mu and the acceleration due to gravityis g , calculate the minimum force required to be applied by the finger to hold the block against the wall. |
Answer» Solution : For the block not to FALL f=Mg But `f=MU R=muF so` `muF=Mg` `F=(Mg)/(mu)`. |
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| 8032. |
Whatare thelimitationsof extracting energyfrom : I ) The WindII)WavesIII)tides . |
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Answer» Solution :(a) Windmills harness WIND energy. One of the limitations of extracting energy from wind is that a windmill REQUIRES wind speeds more than 15 km/h to generate electricity. Also, a large number of windmills are REQUIRED, which cover a huge area. (b) Very high tides are required to extract energy from tides. STRONG ocean waves are required to extract energy from waves . (c) Very high tides are required to extract energy from tides. Also, occurrence of tides depends on the relative positions of the sun, moon, and the earth. |
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| 8033. |
(ii) Ag_(s) +HCI_(I) to AgCI darr + H_(2) uarr |
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Answer» Solution :Step 1 :Rewrite the given equation as it is ` Ag_(s) + HCI_(I) to AgCI darr + H_(2)` Step 2 :Writethe number of atoms of each ELEMENT in theunbalanced equation on bothsides of equations.  The number of silver and chlorine atoms on bothsides of the equation are same, therefore, EQUALISE the number of hydrogen atoms. Step 3:To balance the number of hydrogen atoms .  To equalise the number of hydrogen atoms, we use 2 as the factor in the product HCI, now the unbalanced equation become ` Ag + 2HCI to AgCI + H_(2)` Step 4 : To balancethe number of chlorine atoms :  To equalise the number of chlorine atoms, we use 2 as the factor in the product , AgCI , now the unbalanced equation becomes ` Ag + 2HCI to 2AgCI + H_(2)` Now count the atoms of each element on both sides of the equation, there are LESS number of silver atoms in the reactant. Now equalise the silver atoms, the balanced equation becomes. `2Ag + 2HCI to 2AgCI + H_(2)` Now indicate the physcial states of the reactantsand products ` 2Ag_((s)) + 2HCI_(4(AQ)) to 2AgCI darr + H_(2) uarr ` |
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| 8034. |
F particle moves in x-y plane under the action of force vecF such that the value of its linear momentum (vecp) at any instant t is p_x=2 cos t and py=2 sin t. The angle theta between vecFvecP at a given time t will be- |
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Answer» `90^(@)` |
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| 8035. |
It you could use any source of energy for heating your food, which one would you use and why ? |
| Answer» SOLUTION :SOLAR ENERGY because it is FREE and non-polluting. | |
| 8036. |
Fig.1.31 shows two forces each of magnitude 10N acting at points A and B at a separation of 50cm, in opposite directions. Calculate the resultant moment of the two forces about the point (i) A (ii) B and (iii) O situtated exactly at the middle of the two forces. |
| Answer» Solution :(i) 5Nm clockwise, (II) 5Nm clockwise, (III) 5 Nm clockwise | |
| 8037. |
Resistance : ("Voltage")/("Current"):: Power : ____________ |
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Answer» SOLUTION :`"Voltage"xx"current"` RESISTANCE is related to voltage and current by the formula `("voltage")/("Current")`. Similarly, POWER is related to voltage and current by formula, `"voltage"xx"current."` |
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| 8038. |
The value of universal gas constant is ______ . |
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Answer» `3.81 "MOL" KJ^(-1)` |
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| 8040. |
Sania and Shreya are best friends and study in grade 4. Recently, Sania has been facing difficulty in reading the blackboard text from the last desk. Shreya is little uncomfortable and wonders why Sania complains sitting on the last desk. On observation she found that Sania often carries junk food in her lunch. Shreya has started sharing her lunch - full of green vegetables and fruits with her. Sania is now better and has also started taking a 'balanced diet'. Answer the following questions based on the above situation: (i) Name the eye defect Sania is suffering from? What are the two possible reasons related to her eye defect? (ii) What value is displayed by Shreya and Sania? (iii) How can this value be promoted? Suggest one activity. |
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Answer» Solution :(i) Myopia/short sightedness. Lens defect (INCREASED thinness), eye ball defect (ELONGATION). (ii) FRIENDSHIP, concern for each other, appreciation for balanced diet. (III) Sharing common things, helping each other in studies. |
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| 8041. |
A transverse harmonic wave on a string is described by y(x, t)=3.0 sin (36t+0.018n +pi//4), where x and y are in cm an t in sec. The positive direction of x is from left to right. (a) Is this a travelling wave or a stationary wave? (b) What are its amplitude and frequency? |
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| 8042. |
What is the difference between a direct current and an alternating current? How many times does AC used in India change direction in one second? |
| Answer» Solution :DIRECT current ALWAYS flows in one direction but the alternating current reverses its directionperiodically. Also the magnitude of current in case of DC is same throughout whereas in case of AC, it changes continuously. The frequency of AC in INDIA is 50 Hz and in each cycle it alters direction TWICE. Therefore, AC changes direction`2xx50=100` times in one second. | |
| 8043. |
What are stomata ? What function do they perform ? With the help of diagram explain opening and closing of stomata. |
| Answer» Solution :Stomata are small pores in the lower epidermis of the LEAVES. Stomata helps in the exchange of gases between the leaves of the plants and OUTSIDE air. Stomata ALSO control the LOSS of water in the form of vapours through the leaves during transpiration. | |
| 8044. |
Magnetic effect of electric current : Hans Oersted : : Electromagnetic induction : |
| Answer» SOLUTION : MICHAEL FARADAY | |
| 8045. |
a) On what basis would you classify energy sources as Renewable and Non-Renewable. b) Exhaustable and in-exhaustible? Are the options given in (a) and (b) the same |
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Answer» Solution :Three methods of producing energy are as FOLLOWS: a) The sources of energy that replenishes in nature is known as renewable source of energy. Sun, wind, moving water, bio-mass, etc are some of the examples of renewable sources of energy. The sources ofenergy that does not replenish in nature is known as non-renewable sources of energy. COAL, PETROLEUM, naturalismo gas etc are some of the examples of non-renewable sources of energy. B) Exhaustible sources are those source of energy which will deplete and exhaust after a few hundred years. Coal, petroleum etc, are the examples. Inexhaustible source of energy are those sources which will not exhaust in future. These are unlimited. Bio mass is one of the in exhaustible sources of energy Yes, that option GIVEN in a) and b) are the same |
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| 8046. |
(i) Calculate the gram molecular mass of NH_(3) |
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Answer» Solution :(i) Atomic MASS of N=14 Gram molecular mass of `NH_(3)=(14xx1)+(1xx3)` =`14+3=17 g` (ii) `"Mass PERCENTAGE"=("Mass of the solvent")/("Mass of the solute+Mass of the solvent")` =`(500)/(500+50)xx10` =`(500)/(550)xx100=90.90%` (iii) Mass of water =0.18 g `"Number of moles"=("Mass")/("Molecular Mass")` =`(0.18)/(18)=0.01` MOLE `"Number of MOLECULES"="No. of moles"xx"Avogadro number"` =`0.01xx6.023xx10^(23)` =`0.06023xx10^(23)` =`6.023xx10^(21)` molecules |
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| 8048. |
Role of Latent heat in the change of state of a substances. |
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Answer» Solution :(i) During change of STATE of a substance, OBJECT absorbs or RELEASE heat energy. (ii) But the temperature does not change. (III) The heat energy is utilized for weakening the bonds between the atoms or molecules in thesubstance. (iv)HENCE, this energy which causes a change in state and does not change the temperature is called Latent heat. |
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| 8049. |
What is the function of seed coat seed coat? |
| Answer» Solution :SEED coat acts as a protective covering for the seed. It protects the seed FORM environmental STRESS and injury? | |
| 8050. |
Assertion (A): Flow of 6.25 times 10^18 electrons per second through a cross section of a conductor constitutes an electric current of one ampere. Reason ( R): Charge on an electron =1.6 times 10^-18 C |
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Answer» Both (A) and (R ) are true and (R ) is correct explanation of the assertion |
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