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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.
| 5751. |
Read the paragraph given below and answer the questions : The substances formed by specific chemical bond between fatty acids and alcohol are called lipids. Digestion of lipids consumed by us is nothing but their conversion into fatty acids and alcohol. Fatty acids are absorbed and distributed everywhere within the body. From those fatty acids, different cells produce various substances necessary to themselves. Ex the molecules called phospholipids which are essential for producing plasma membrane are formed from fatty acids. Besides, fatty acids are used for producing hormones like progesterone, estrogen, testosterone, aldosterone, etc. and the covering around the axons of nerve cells. We get 9 Kcal of energy per gram of lipids. Excess of lipids are stored in adipose connective tissue in the body.What happens to lipids when their digestion is completed? How much energy do they provide? |
| Answer» Solution :After complete DIGESTION of lipids they are converted of FATTY acids and glycerol. 1 gm of lipid PROVIDES 9 kcal of energy. | |
| 5752. |
Name an instrument in which the directive property of a magnet is used. |
| Answer» SOLUTION :A CAMPASS NEEDLE. | |
| 5753. |
Read the paragraph given below and answer the questions : The substances formed by specific chemical bond between fatty acids and alcohol are called lipids. Digestion of lipids consumed by us is nothing but their conversion into fatty acids and alcohol. Fatty acids are absorbed and distributed everywhere within the body. From those fatty acids, different cells produce various substances necessary to themselves. Ex the molecules called phospholipids which are essential for producing plasma membrane are formed from fatty acids. Besides, fatty acids are used for producing hormones like progesterone, estrogen, testosterone, aldosterone, etc. and the covering around the axons of nerve cells. We get 9 Kcal of energy per gram of lipids. Excess of lipids are stored in adipose connective tissue in the body. Define lipids. |
| Answer» Solution :Lipids are molecules FORMED of FATTY acids and GLYCEROL (alcohol) which have SPECIFIC BONDS between them. | |
| 5754. |
How has the traditional use of wind and water energy been modified for our convenience? |
| Answer» Solution :To use ENERGY of flowing water large dams are BUILT in hilly regions to store huge amount of water at a height. The stored water from high level in DAM is carried through pipes to the turbine at the BOTTOM of the dam and runs HYDROPOWER plant, Similiarly the wind energy is used to generate electricity, For the same purpose , the rotatory motion ofwind mill is used to turn the turbine of the electric generator. | |
| 5755. |
The amount of heat required to raise 1^(@)C of 1 g of water is ____________. |
| Answer» SOLUTION :1 CALORIE | |
| 5756. |
What is a prism ? Draw a neat diagram to show refraction of a light ray through a triangular glass prism. Define angle of deviation. |
Answer» Solution :An optical PRISM has two TRIANGULAR bases and THREE rectangular lateral surfaces, which are inclined to each other. Angle between its two lateral faces is called the angle of prism. The labelled diagram has been shown in Fig. 11.5, in which `anglePEN=anglei`=angle of INCIDENCE, `angleN.EF= angler`=angle of refraction and `angleMRF= anglee=` angle of emergence  Whenever refraction of light takes place through a prism, the emergent ray bends towards the BASE ofthe prism. The angle between the directions of incident ray and emergent ray is called the angle of deviation D. |
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| 5757. |
State whether the following statementare true or false : An electricmotorconvertsmechanicalenergy intoelectricalenegy. |
| Answer» SOLUTION :An ELECTRIC motorconverts electricalenergyintomechanical ENERGY . | |
| 5758. |
State the cause of dispersion of white light passing through a glass prism. How did Newton show that white light of sun contains seven colours using two identical glass prisms. Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the focus of the first prism. |
Answer» SOLUTION :Cause of DISPERSION of white light : Different colours of light bend through different angles with respect to the incident ray as they pass through a prism. VIOLET light bends the most and RED the least. Thus, each colour EMERGES along different paths. 
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| 5759. |
Compare the above system with the probable system in hilly/ mountainous areas or plan or plateau regions. |
| Answer» Solution :In mountainous areas instead of TRADITIONAL water harvesting system, check dams are BUILT across the seasonally FLOODED GULLIES. In this system running water is stored and diverted to the required places such water does not remain for long, hence there is LESS chance of its becoming polluted like that of pond water. | |
| 5760. |
What is the colour of danger ? |
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Answer» RED |
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| 5761. |
Determine the equivalent resistance between points X and Y in the follOwing circuit: |
| Answer» SOLUTION :`15 OMEGA` | |
| 5762. |
What is the advantage of the earth-wire connectionin domestic electrical circuits ? |
| Answer» Solution :The earth wire in DOMESTIC electrical circuits sends leakage CURRENT from METALLIC parts of appliancesto the earth saving the user from an electric shock. | |
| 5764. |
It is said that a difference of 20^(@)C in temperature of water at two levels can be exploited to generate electricity. Name the power plant that can be used for this purpose. Describe the process and give its main advantage. |
| Answer» SOLUTION :It is correct that a difference of `20^(@)C` in TEMPERATURE of water at two levels can be exploited to generate electricity. For this purpose, Ocean Thermal Energy Conversion (OTEC) power plants are used. To use this plant, a difference of `20^(@)C` or more between the temperature of surface waters and water at depths of 1000 METERS is required. In one of Ocean Thermal Energy Conversion system, the warm surface water is used to boil low boiling liquid like ammonia, or a chlorofluorocarbon. The VAPOURS of the liquid are then sent to move the turbines of generator. The cold water from the depths is used to cool the vapour escaped from the turbines and CONVERTED into liquid to be used again. | |
| 5765. |
Can any source of energy be pollution - free ? Why or why not? |
| Answer» Solution :No, any source of ENERGY cannot be pollution - free . Exploiting any source of energy disturbs the ENVIRONMENT in some WAY or the other. Only the degree and manner of pollution varies. In some cases, the actual operation of a device like the solar CELL may be pollution - freebut the assembly of the device WOULD have caused some environment damage. | |
| 5766. |
Why does a compass needle get deflected when brought near a bar magnet? |
| Answer» SOLUTION :A compass needle gets DEFLECTED when BROUGHT near a bar magnet because MAGNETIC force is exerted by the bar magnet on the compass needle, which is itself a tiny pivoted magnet. | |
| 5767. |
Give reasons Transport system in plants is slow. |
| Answer» Solution :Transport is SLOW in PLANTS because they do not have a PUMPING MECHANISM and is DONE mainly by physical factors. | |
| 5768. |
What is the purpose of human eye? |
| Answer» SOLUTION :It ENABLES US to see and perceive the OBJECT in our vicinity. | |
| 5769. |
Fuse |
| Answer» Solution :Fuse is a PROTECTIVE DEVICE USED for protecting ELECTRICAL circuits and devices from SHORT circuit and overloading | |
| 5770. |
What happens to the force acting on a current-carrying conductorplaced in amagnetic field when : a] current in conductorincreases ?b]length oftheconductor increases ?c] direction of the currentand magnetic fieldare reversed ?d] direction of thecurrent is reversed without changing thedirection of magneticfield ? |
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Answer» Solution :a] The deflection of the compass needle increases because of the increase in the strength of the magnetic FIELD [B `prop` l] b] The DIRECTION of deflection of the compass needle is reversed because the direction ofmagneticfield is reversed. c] The deflection on the compass needle decreasesdue to the decrease in the strengthof the magnetic field [B `prop` 1/r]. |
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| 5771. |
the circular motion of a particle with constant speed is |
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Answer» SIMPLE HARMONIC but not PERIODIC |
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| 5772. |
Figure shows a system of four pulleys. The upper two pulleys are fixed and the lower two are movable. (a) Draw a string around the pulleys. Also show the point of application and direction in which the effort E is applied. (b) What is the velocity ratio of the system ? (c) How are load and effort of the pulley system related ? (d) What assumption do you make in arriving at your answer in part (c) ? |
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Answer» Assumption: (1) There is no friction in the pulley BEARINGS, (2) Weight of lower block of pulleys is NEGLIGIBLE, (3) The effort is applied downwards. |
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| 5773. |
How can you measure the moment of couple ? |
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Answer» Solution :(i) Rotating effect of a couple is known as MOMENT of a couple. (ii) Moment of a couple is mensured by the product of any ONE of the FORCES and the perpendicular DISTANCE between the line of action of two forces. The turning effect of a couple is measured by the magnitude of its moment. (III) `"Moment of a couple" =" Force" xx" perpendicular distance between the line of action of forces"` `M=FxxS" …………… "` (iv) The unit of moment of a couple is newton metre (N m) in SI system and dyne cm in CGS system. (v) By convention, the direction of moment of a force or couple is taken as positive if the body is rotated in the anti-clockwise direction and negative if it is rotate in the clockwise direcetion. They are shown in Figures. 
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| 5775. |
Complete the following pathway showing the breakdown of glucoseGlucose overset("in cytoplasm")rarr(i) underset(3- "carbon molecules + energy") rarr underset("in mitochondria")overset("presence of" O_(2)) rarr (ii) overset(?) rarr + H_(2)O+ "Energy" |
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Answer» SOLUTION :(i) PYRUVATE (II) `Co_(2)` |
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| 5776. |
What is the difference between nm, mN, Nm ? |
| Answer» Solution :MN MEANS milli NEWTON, `1 mN = 10^(–3) N, Nm` means Newton meter, nm means nano meter. | |
| 5777. |
What is meant by Solenoid ? How does a current carrying Solenoid behave ? Give its main use. |
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Answer» Solution :A coil of many clrcular turns of insulated copper wire wrapped closely in the shape of a CYLINDER is called a Solenoid. The field lines around a current-carrying solenoid is similar to that produced by a bar magnet This MEANS that a current - carrying solenoid behaves as having north pole and SOUTH pole. The STRONG magnetic field produced inside a solenoid can be USED to magnetise a piece of magnetic material like soft iron when placed inside the coil. |
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| 5778. |
What is meant by Rayleigh scattering. |
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Answer» Solution :Rayleigh.s scattering LAW states that, ..The amount of scattering of light is inversely proportional to the fourth power of its WAVELENGTH... `.S.prop(1)/(lambda^(4))` |
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| 5779. |
We can see the Sun even when it is little below the horizon because of |
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Answer» Reflection of LIGHT |
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| 5780. |
Mohan takes 5 mL of distilled water in four test tubes A, B, C and D. He dissolves sodium chloride in test tube A, calcium chloride in test tube B, magnesium chloride in test tube C and potassium chloride in test tube D. In which test tube(s) will scum be formed with soap? |
| Answer» Solution :Scum will be formed in test tubes B and C because calcium CHLORIDE and MAGNESIUM chloride make water hard and react with soap to FORM an insoluble white precipitate CALLED scum. | |
| 5781. |
Define one newton and one dyne. |
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Answer» Solution :DEFINITION of 1 NEWTON (N): The amount of FORCE required for a body of mass 1 kg produces an acceleration of `"1 ms"^(-2), 1N="1 kg ms"^(-2)` Definition of 1 dyne : The amount of force required for a body of mass 1 gram produces an acceleration of `1 cms^(-2)," 1 dyne = 1g cms"^(-2)`, also `1 N=10^(5)" dyne."` |
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| 5782. |
Magnitude of universal gravitational constant is ……………………… |
| Answer» SOLUTION :`6.674xx10^(-11)MN^(2)KG^(-2)` | |
| 5783. |
In (Fig. 2.30)., name the incidentray, refracted ray and emergent ray. |
| Answer» SOLUTION :In (Fig. 2.30), `PQE` is incident ray , `EF` is refracted ray and `FRS` is the EMERGENT ray. | |
| 5784. |
In an experiment to study the scattering of light by passing a beam of white light through a colloidal solution of sulphur in a transparent glass tank : (a) Which colour is observed from the front of the glass tank ? Does this colour correspond to the colour of sky on a clear day or the colour of sky around the sun at sunset ? (b) Which colour is observed from the sides of the glass tank ? Does this colour correspond to the colour of sky on a clear day or the colour of sky around the sun at sunset ? |
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| 5785. |
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero ? |
| Answer» SOLUTION :KINETIC ENERGY CHANGES to POTENTIAL energy . | |
| 5786. |
The v-t graphs of two objects make angles of 30^circ and 60^circ with the time-axis. Find the ratio of their accelerations. |
| Answer» SOLUTION :`(a_(1))/(a_(2))=(tan30)/(tan60)=(1//SQRT(3))/(sqrt(3))=(1)/(3)=1:3` | |
| 5787. |
Lamarckism. |
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Answer» Solution :(1) Lamarckism consists of two theories which were proposed by Jean Baptiste Lamarch. These are as follows : (a) Use and DISUSE of the organs (b) Ingeritance of acquired characters. (2) In theory of use and disuse of organs, Lamarck says: The characters of organs develop because specific ACTIVITIES that the organisms perform. If such organ is not used it gets degenerated. Thus the morphological changes take place due to activities or inactivity of a particular organism. (3) To emphasise this theory, he quoted following EXAMPLES. Due to constant extension of neck to eat foliage from the TOP of the trees, giraffe's neck became long. Similarly blacksmith has strong arms due to constant work. Flightless ostrich and emu did not fly and hence their wings became useless. Aquatic birds like swan and duch made their feet suitable for swimming by living in water. Snake lost limbs as it tried burrowing mode. (4) Such acquired characters are passed from one parental generation to the offspring. This is called inheritance of acquired characters. (5) The theory of inheritance of acquired characters is not accepted as such transmission of acquired character does not take place. Only GENETIC characters are transmitted. |
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| 5788. |
.Omegam.is the SI unit of ……………. |
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Answer» RESISTANCE |
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| 5789. |
A postage stamp kept belowarectangular glass slab of refractive index 1*5 when viewed from vertically above it, appears to be raised by 7*0mm. Calculate the thickness of the glass slab. |
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Answer» |
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| 5790. |
________ is the weightof the body acquireddue to the action of gravity and other external forces . |
| Answer» SOLUTION :APPARENT WEIGHT | |
| 5791. |
What is meant by a magnetic field ? Mention two parameters that are necessary to describe it completely. |
| Answer» SOLUTION :The space around the magnet or current carrying conductor within which its INFLUENCE can be felt by the MAGNETIC SUBSTANCE is known as magnetic field. Magnitude and direction. | |
| 5792. |
In a simple circuit, why does the bulb glow when you close the switch ? |
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Answer» The SWITCH produces electricity. |
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| 5793. |
What were the objections raised against Darwinism? |
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Answer» SOLUTION :Some of the main OBJECTIONS raised against Darwinism are as FOLLOWS : (1) There are other factors too for evolution and just not the Natural Selection. (2) Arrival of useful and useless modifications were not explained by Darwin, though he said about the SURVIVAL of the fittest. (3) He has not given any EXPLANATION about slow changes and abrupt changes occurring during evolution. |
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| 5794. |
Tabacoo containing substances has ____________effect on mouth and lungs |
| Answer» Solution :Tabacco containing substances has `UL ( CARCINOGENIC) ` EFFECT on MOUTH and lungs. | |
| 5795. |
Resistance and Resistivity |
Answer» SOLUTION :
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| 5796. |
(a) Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole. (b)Whatdoes the degree ofclosenes of field lines represent ? |
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Answer» Solution :(a) Take a bar magnet and place it on a sheet of white paper fixed on a drawing sheet. Mark the boundary of magnet. Take a small compass and place it near the north pole of the magnet. Mark the position of TWO ends of compass NEEDLE. MOVE the needle to a new position so that its south pole occupies the position previously occupied by its north pole. In this way proceed step by step till we reach the south pole SN of magnet. Join the points marked on the paper by a smooth curve. This curve represents a magnetic FIELD line as shown in Fig. 13.14. (b) The degree of closeness of magnetic field lines signifies the strength of magnetic field. 
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| 5797. |
The least count of the voltmeter shown below is : |
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Answer» 0.1 V |
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| 5798. |
The main reason behind the advanced sunrise and delayed sunset is . . . . . .of light . |
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Answer» Reflection |
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| 5799. |
What difference can be seen between eyeball suffering from nearsightedness and that suffering from farsightedness? |
| Answer» Solution :Eyeball suffering from nearsightedness is SEEN to be ELONGATED, WHEREAS, the eyeball suffering from FARSIGHTEDNESS is FLATTENED. | |
| 5800. |
What is the use of corals ? |
| Answer» SOLUTION :Coral is a precious stone which is used in JEWELLERY . The ASH obtained from CORALS is also used in ayurvedicmedicines . | |