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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.
| 4901. |
What are the various ways to minimize mental stress? |
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Answer» Solution :The ways of STRESS-bursting are as follows (1) Laughter club : people gather together and laugh collectively to reduce stress. (2) Good communication : One should establish good communication with friends,SIBLINGS,cousins, teachers,parents or anybody in whom we can confide and express our feelings (3) Writing : By writing and noting the thoughs we feel relived We can confess and analyse about our mistakes through writing to reduce our stress. (4) Hobbies : Collecting curios, photography reading good literature music ,cooking,gardening bird watching, keeping a pet,sculpturing ,drawing, rangoli,dancing,etc, are such hobbies which are necssary for utillizing our spare time by creativity Persuading hobby is the best way to be stress-free.music in particular is said to change the negative thoughts, therefore,listening to music,leatnig the music and singing helps to FIGHT stress, By admirig nature too,stress is relived. (5) Outdoor games and physical exercise : By partivipating in the sports, there are various benefits such as physical exercisek,IMPROVING discipline interaction with others and creating the tendency of unity. becoming more social and reduce stress. |
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| 4902. |
What is meant by advance sunrise and delayed sunset? Draw a labelled diagram to explain these phenomena. |
| Answer» Solution :(i) Due to atmospheric REFRACTION, the SUN is VISIBLE to US about two MINUTES before the actual sun-rise and about two minutes after the actual sun-set. | |
| 4903. |
The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. Whatcurrent will the heater draw, if the potential difference is increased to 120V ? |
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Answer» Solution :We are given, potential differenceV = 60 V. current 1= 4 A. According to the Ohm.s law, resistance of HEATER coil `R = V/I =(60V)/(4A) =15 Omega.` When the potential difference is increased to 120V the current is given by current `= V/R =(120V)/(15OMEGA)= 8A`. THUS, the current through the heater becomes 8A. |
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| 4904. |
An incident ray strikes a plane mirror at an angle of 15^@ with the mirror. The angle between the reflected ray and the mirror is |
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Answer» `15^@` So, the angle between the REFLECTED RAY and the MIRROR is `90^@-75^@=15^@`. |
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| 4905. |
Which projectswill you run in relation to environmental conservation ? How ? |
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Answer» Solution :Initially, assessment of the environmental problems will be done. The nature and severity of these problems will be understood by detailed study of the same. Then the projects can be undertaken to combat these problems. (1) Tree plantation is one such easierproject that can be undertaken to CONSERVE environment. The further nurturing of the tree will also be our responsibility . While selecting the tree, the local andsturdy varieties will be selected. Such trees can survive in polluted environment too and even under the pressure of urbanization. (2) Solid waste management is another veryimportant project that should be undertaken by every society, colony or school . Segregation of waste into dry adn wet types and then its proper disposal will be taught to all the people in theneighbouring area. (3) To ban the plastic and make people aware about harmful effects of plastic is another very significant project. (4) Fossil fuels are non-renewable and polluting. Therefore, their use should be reduced as far as possible. Therefore, using bicycle , or walking down for shorter distances or using public transport systems are the better alternatives . The awareness drive about these facts will be taken up as a project. (5) To take care of STRAY animals, provide shelter, feeding endangered birds like sparrows and allowing them to survive withour support is also one of the essential act to conserve other species. (6) Attempts will be made for bringing awareness among minds of EVERYONE. Such small ACTS can bring about major SHIFT in the attitude of the people. This will certainly help in the environmental conservation. |
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| 4906. |
Assertion (A) : The sex of a child in human beings will be determined by the type of chromosome he/she inherits from the father. Reason (R ) : A child who inherits 'X' chromosome from his father would be a girl (XX) , while a child who inherits a 'Y' chromosome from the father would be a boy (XY). |
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Answer» Both (A) and (R ) are true and (R ) is correct explanation of the ASSERTION. |
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| 4907. |
What are the limitations of extracting energy from (a) the wind ? (b) waves ? (c ) tides ? |
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Answer» Solution :(a) Limitations of extracting energy from winds : 1. it requires a lot of space. 2. It is not available everywhere and at all the times. 3. It may result in huge wear and tear. 4. Wind VELOCITY must be sufficient. It should never be LESS than `15 km h^(-1)`. (b) Limitations of extracting energy from wave : 1. Waves are possible only when a strong wind is blowing over the surface of sea wheeas tides depend upon the attraction of moon. 2. It is a very costly affair and DIFFICULT to MANAGE it in sea. (c ) Limitations of getting energy from tides : 1.Its cost is huge and is not possible to build such dams everywhere. 2. It is difficult to maintain and operate tidal wave dams deep in the sea. 3. Huge AMOUNT of slit deposited in the basis of the dam. |
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| 4909. |
Briefly describe how you would find the focal the focal length of a concave mirror quickly but aproximately. |
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| 4910. |
Child of your neighbour is addicted to tobacco chewing. |
| Answer» Solution :The hazards of TOBACCO chewing will be explained to this child. Different PHOTOGRAPHS and videos and videos SHOWING the conditions of oral cancer will be shown to this child to persuade him, so that he can stay away from tobacco. This addiction has to be removed, so HELP of hisparents will be taken. They will be told the child's habit and ASKED to help him free his addiction. | |
| 4911. |
Assertion : The stars twinkle while the planets do not. Reason: The stars are much bigger in size than the planets. |
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Answer» Both ASSERTION and REASON are TRUE and reason is correct explanation of assertion. |
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| 4912. |
A test tube containing some water is surrounded by melting ice (pure). Then, the water in the test tube will |
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Answer» not FREEZE into ice |
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| 4913. |
Boiling point of the liquid : |
| Answer» SOLUTION :The constant TEMPERATURE at which the liquid TRANSFORMS into gaseous state is called the BOILING POINT of the liquid. | |
| 4914. |
(a) What happens when a ray of ordinary light is passed through a triangular glass prism ? (b) What will happen if another similar glass prism is placed upside down behind the first prism ? |
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Answer» |
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| 4915. |
What must be the direction of this force ? |
| Answer» Solution :The FORCE is directed TOWARDS the centre of the EARTH | |
| 4916. |
State the observation made by Oersted on the basis of his experiment with current carrying conductors. |
| Answer» SOLUTION :EVERY current CARRYING conductor has a magnetic field AROUND it. | |
| 4917. |
State the condition to get a larger magnification of a small object by a compound microscope |
| Answer» Solution :To get larger magnification of a smaller object, both the OBJECTIVE and the eye PIECE of the compound microscope should have smaller focal LENGTHS. Magnification of the order of 1000 is POSSIBLE with the very good design of the microscope. Such as OIL immersion type. | |
| 4918. |
The process of transfer of heat energy, the body at ____________ temperature is heated. |
| Answer» SOLUTION :TEMPERATURE | |
| 4919. |
What do you mean by linear magnification produced by mirrors ? The power of a lens is +2.5 D . What kind of lens is it and what is its focal length ? Draw a ray diagram of an image when an object is placed on the principal axis of a convex lens between focus and optical centre. |
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Answer» Solution :(i)convex lens (converging lens) `P=+2.5 D, "" f=1/P =1/(2.5 m) =(100xx10)/2.5 =+40 cm ` (ii) When an object is placed between focus and optical centre of the convex lens then the IMAGE will be VIRTUAL, MAGNIFIED, ERECT. |
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| 4920. |
The chargeless particles is called neutron, it was discovered by ….. |
| Answer» SOLUTION :JAMES CHADWICK | |
| 4922. |
Rahul went to an electronics shop to get his father's old radio set repaired. The radio mechanic required resistances of 1.5 Omega and 10 Omega to repair the radio set properly but he had only a large number of 3 Omega resistors. The radio mechanic made many attempts but could not get the right combinations of 3 Omega resistors to obtain 1.5 Omega and 10 Omega resistances. Rahul had studied combination of resistors in class X. Rahul thought for a while and then joined some 3 Omega resistors in two different ways to obtain the required resistances. (a) How did Rahul obtain 1.5 Omega resistance by joining a number of 3 Omega resistors ? (b) How many 3 Omega resistors were combined together to obtain 1.5 Omega resistance ? (c) How did Rahul obtain 10 Omega resistance by joining a number of 3 Omega resistors ? (d) How many 3 Omega resistors were combined together by Rahul to obtain 10 Omega resistance ? (e) What values are shown by Rahul in this apisode ? |
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Answer» Solution :(a) In ORDER to obtain `1.5 Omega` resistance, Rahul first combined three `3 Omega` resistors inparallel to obtain a resistance of `1 Omega`. He then connected six `3 Omega` resistors in parallel to obtain a resistance of `0.5 Omega`. These two parallel combinations were then connected in SERIES to obtain a resistance of `1 + 0.5 = 1.5 Omega` (see Figure 1) (b) Nine `3 Omega` resistors.  (c) In order to obtain `10 Omega` resistance, Rahul first connected three `3 Omega` resistors in parallel to obtain a resistance of `1 Omega`. He then connected three `3 Omega`resistors in series to get a resultant resistance of `9 Omega`. The parallel combination and series combination were then connected in series to obtain a final resistance of `1 + 9 = 10 Omega` (see Figure 2). (d) Six `3 Omega` resistors. (e) Rahul showed the values of (i) Knowledge of combination of resistors (II) Application of knowledge, and (iii) DESIRE ot help others. |
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| 4923. |
A position dependent force F=7-2x+3x^(2)N acts on a small body of mass 2 kg and displaces it from x=0 to x=5m. The work done in joule is |
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Answer» 135 |
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| 4924. |
What does the slope of a distance-time graph indicate ? |
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Answer» Speed |
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| 4925. |
To study the dependence of current (I) on the potential difference (V) across a resistor, the correct way of connecting the ammeter and voltmeter in the circuit is : |
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Answer» AMMETER and VOLTMETER both are connected in SERIES |
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| 4926. |
If the refractive index of a certain glass with respect to water is 1.25 , find the refractive index of water with respect to the glass. |
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Answer» |
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| 4927. |
Which of the following animals' body shows bilateral symmetry ? |
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Answer» Starfish When an imaginary PLANE passing through only one axis can divide the BODY into two equal halves , then it is CALLED bilateral symmetry. Such symmetry is shown only by earthworm. Sponge body is asymmetrical while starfish and jellyfish are radially SYMMETRICAL. |
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| 4928. |
Three point masses m_(1), m_(2) and m_(3) are located at the vertices of an equilateral triangle of side alpha. What is the moment of inertia of the system about an axis along the altitude of the triangle passing through m_(1)? |
Answer» SOLUTION :
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| 4929. |
Assertion: When a wire is not connected to battery, no current flows. Reason: Charge does not flow in particular direction. |
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Answer» if both the ASSERTION and the reason are trueand the reason is the CORRECT explanation of the assertion. |
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| 4930. |
Which of the following does not represent a simple machine? |
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Answer» Lever |
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| 4931. |
Natural gas contains _____ per cent of methane gas. |
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Answer» 96 |
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| 4933. |
Two identical resistors each of resistance 10 Omega are connected (i) in series and then (ii) in parallel, in line to a battery of 6 volts. Calculate the ratio of power consumed in the combination of resistors in the two cases. |
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Answer» SOLUTION :Here `R_1=R_2=10 OMEGA` and V=6 volt (i) In series NET resistance `R_s=R_1+R_2=10+10=20 Omega` and Power `P_s=V^2/R_s=(6)^2/20=1.8 W` (II) In parallel net resistance `1/R_p=1/R_1+1/R_2=1/10+1/10=1/5 implies R_p=5 Omega` and Power `P_p=V^2/R_p=(6)^2/5=7.2 W` `implies P_s/P_p=1.8/7.2=1/4` |
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| 4935. |
What is the name of bacteria found in human intestine and also present in Ganges water ? |
| Answer» SOLUTION :COLIFORM BACTERIA. | |
| 4936. |
Jhansi has been using the given devices in her house. Calculate the current bill for one month @5//-"per unit." 1. 100 W TV for 12 hrs. 2. 80 W two fans for 10 hrs 3. 11 W four LED bulbs for 12 hrs. |
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Answer» Solution :Power consumption of the given DEVICES in watt HOURS. 1. TV `rArr1xx100xx12=1200WH` 2. Fans `rArr2xx80xx10=1600WH` 3. LED bulbs `4xx11xx12=528WH` Total = 3328WH 3328 WH MEANS 3.328 KWH Power consumption for 1 day = 3.328 Units. Power consumption for 30 days = 3.328xx30 99.84 U Current bill `@5//-"per unit" =99.84xx5//-=Rs 499.20//-` |
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| 4937. |
Lake tapping : |
| Answer» Solution :A lake tap involves excavating a tunnel at the bottom of the lake. Dynamites are PLANTED THEREIN and blasted carefully. The water flows with greater FORCE through the tunnel after such blasting is done. This increased flow of water is then driven to the hydroelectric power generation plant for increased electricity production. This TECHNIQUE is done to establish waterways for hydropower, for MAKING drinking water available, for irrigation water purposes and also for the landing of oil and gas pipes offshore fields. | |
| 4938. |
A point object is placed in front of a plane mirror. If the object and the mirror start moving away from each other with speed v along a straight line then speed of the image w.r.t. mirror is |
| Answer» Answer :A | |
| 4939. |
All the constituent colours of sunlight do not have same rate of scattering. Write the reason fòr this? |
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Answer» |
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| 4940. |
Iron is a conductor of electricity, but when we pick up a piece of iron resting on the ground, why don't we get electric shock? |
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Answer» SOLUTION :1.As the iron piece is kept on the ground, the excess electrons or PROTONS are TRANSFERRED/ neutralized by the earth. Hence, it will have equal number of protons and electrons. 2. Due to this, STATIC electricity is not created and the person picking it up does not get an electric shock. |
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| 4941. |
The resistance of a wire is R. When this wire is stretched so that its length becomes double, its cross-sectional area becomes half. What will be the resistance of this stretched wire? |
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Answer» `R/2` Resistance of the STRETCHED wire `R.= rho. (l.)/(A.)` But 1 = 2 an A ` = A/2` `:. R.=rho (2l)/(A/2) = (4) rho 1/A =4R` |
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| 4942. |
What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility ? |
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Answer» Solution :ADVANTAGES of solar cooker : (i) Solar cooker CAUSES no pollution. (ii) Solar cooker saves FUEL like wood, LPG, kerosene oil etc. Disadvantages of solar cooker : (i) Food cannot be cooked on a cloudy day and at night. (ii) Large amount of food cannot be cooked using solar cooker. Solar cooker will have limited utility at the places where sun shines for a shorter PERIOD of time. |
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| 4943. |
State any four benefits of animal classification . |
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Answer» Solution :(1) Studying the different animals becomes easy when they are placed under different groups. (2) When few representative animals of the PARTICULAR group are studied then the idea about other animals belonging to that group also becomes CLEAR. (3) The ANIMAL evolution becomes easier to follow after studying classification. (4) The identification of animals can be done ACCURATELY. |
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| 4944. |
A skilled gunman always keeps his gun slightly tilted above the line of sight while shooting. Why? |
| Answer» SOLUTION :Because bullet follow PARABOLIC TRAJECTORY under constant downward acceleration. | |
| 4945. |
What is the cause of dispersion of light ? |
| Answer» Solution :See Short ANSWER QUESTION NUMBER 2. | |
| 4946. |
We with to obtain an erect image of an object, using a concave mirror of focal length 15cm. What should be the range of distance of the object from the mirror? What is the nature of the image ? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this |
Answer» Solution :Range of the DISTANCE of the object= 0 to 15 cm from the pole of the mirror. Nature of the IMAGE = virtual, ERECT and LARGER than the object. 
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| 4947. |
What is the minimuim distance between an object and its real image in case of a concave mirror? |
| Answer» SOLUTION :When object is at centre of CURVATURE, its real IMAGE is also FORMED at the samee point. So the minimum distance is ZERO. | |
| 4948. |
(1//2) mole of helium is contained in a container at STP how much heat energy is needed to double the pressure of the gas, keeping the volume constant? Heat capacity of gas is 3 J g^(-1)K^(-1). |
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Answer» Solution :`n=1/2,C_v=3j//gK . M = 4` `C_v = MC_v = 12 ` J/mole k, `M RARR` Molecular mass `P_2/P_1 =T_2/T_1=2` `DeltaT=2T_1-T_1=273k` `DeltaQ=nC_vDeltaT=1638J` |
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| 4949. |
The equivalent resistance between points A and B in the following electric circuit is ……………… . |
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Answer» `2.5 Omega` `:. R. = (R_1 R_2)/(R_1 + R_2) = (5 xx 5)/(5 + 5) = 2.5 Omega` Now, `R., R_3 and R_5` are connected in series `:. R = R.+ R_3 + R_5` `=2.5 + 5 + 5 = 12.5 Omega` |
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| 4950. |
(a) Two magnets are lying side by side as shown below Draw magnetic field lines between poles P & Q {:(S,N,S,N),(,P,Q,):} (b) What does the degree of closeness of magnetic field lines near the poles signify |
Answer» Solution :(a)  (b) The degree of CLOSENESS of MAGNETIC fields lines near the poles signify that the FIELD is stronger there i.e. the pole of ANOTHER magnet when placed in the magnetic field experiences a greater force where the field lines are CROWDED. |
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