InterviewSolution
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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.
| 8101. |
Which of the following represent voltage? |
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Answer» `(work don E)/(CURRENT times TIME)` |
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| 8102. |
Name the industries which are based on forest products. |
| Answer» SOLUTION :TIMBER , PAPER and SPORTS INDUSTRIES. | |
| 8103. |
The ………….. Light has maximum waveleght whil ……… light has the smallest wavelenght. |
| Answer» SOLUTION :RED,VIOLET | |
| 8104. |
Thief jumps from roofof a housewith a boxof weight W on his head . What will be the weightof the box as experienced by the thiefduring jump ? |
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Answer» SOLUTION :Weightof the BOX during JUMP `W= m(g-a)` `=m(g-g^1)=0`. |
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| 8105. |
A mercury thermometer, with a concave reflector behind the bulb, is placed in front of an electric fire. Which of the following combinations will cause the smallest reading on the thermometer? |
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Answer» BLACK REFLECTOR, black bulb |
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| 8106. |
a) Explain why the planets do not twinkle ? (b) What is the colour of the clear sky during day time? Give the reason for it. |
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Answer» Solution :Planets are much closer to the earth and are seen as exended sources, so a planet may be considered as a COLLECTION of a large number of point size light sources, although light comingfrom individual point sized sources flicks but the total amount of iight entering our eye from all the individual point sized sources average out to be constant thereby plancts appear EQUALLY bright and there is no twinkling of planets. Clear SKY appears blue when sunlight passes through the atmosphere having the molecules of AIR and other fine particles WHOSE size is smaller then the wavelength of visible light. These molecules and perticular scatter the bluc colour nmore strongly then the other colours of spectrum. As the walength of blu: colour is more, this scaltered blue light enters our eye, so, the colour of sky appcars blue to us during day time. |
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| 8107. |
Name two saftey measures commonly used in electric and appliances. |
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Answer» Solution :TWO saftey measures commonly used in electric circuits and appliances are : Electric fuse : An electric fuse is CONNECTED in SERIES it protects the circuit from overloading and prevents it from short circuiting. Proper earthing of all electric circuit in Which any leakage of CURRENT in an electric appliance is transferred to the ground and people using the appliance do not GET the shock. |
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| 8108. |
Use of mutant strains has been increased in industrial microbiology. |
| Answer» SOLUTION :(1) By using industrial microbiology , thecommercial use mutant strains of microbes is done. (2) In such experiments, various economic, social and environment related processes andproducts are included. (3) In this, fermentation processes areare used to make bread, cheese, wines, enzymes, NUTRIENTS, etc. (4) Different types of antibiotics are also made by using processes of industrial microbiology. (5) In pollutioncontrol and solid waste management, the industrial microbiology BECOMES helpful. (6) In farming too biotechnology is used to PRODUCE BT crops. | |
| 8109. |
Which are the reasons for endangering many species of plants and animals ? How can we save those ? |
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Answer» SOLUTION :Following are the reasons for plant and animals species to become endangered `:` i. Natural cause `:` Earthquakes, volcanic eruptions, flood , drought, DRY and wet famines, etc. ii. Man-made causes `:` a. Over-utilization of resources`:` It is a major cause for endangering many plant and ANIMAL species. Extensive cutting of forest trees, over-grazing, over fishing, etc., lead to extinction of many species. b. Environment pollution `:` Pollution of air, water and soil leads to depletion of wildlife. c. HUNTING `:` Poaching for meat , skin, fur, horns, etc., leads to decline in number of wild animals. d. Destruction of habitats `:` Due to human activities like construction of dams and reservoirs, buildings, roads, railways tracks, mining activities, etc., the natural habitatof animals get destroyed. e. Other causes`:` Use of plant and animal species for manufacturing pharmaceuticals, perfumes, cosmetics, MEDICINES, etc. f. Endangered animals can be saved by the following ways `:` 1. Controlling the pollution can have a positive impact on animals. 2. Habitats of the species should be protected and human disturbances should be limited. 3. Use of eco-friendly resouces. 4. Public awareness about the importance and protection of wildlife. |
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| 8110. |
X-rays and radiations from atomic energy plants are natural radiations. True/False |
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| 8111. |
A fixed pulley is driven by a 100 kg mass falling at a rate of 8*0m in 4*0s. It lifts a load of 75*0 kgf. Calculate (a) The power input to the pulley taking the force of gravity on 1 kg as 10 N. (b) the efficiency of the pulley, and (c) The height to which the load is raised in 4*0s. |
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| 8112. |
Thermal electricity generation and solar thermal electricity generation. |
Answer» SOLUTION :
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| 8113. |
Which plants are cultivated to obtain fuel? |
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Answer» Solution :(1) The ETHANOL is obtained from wheat, maize, BEET, SUGARCANE and molasses of sugarcane. (2) For BIODIESEL, the soyabean, rapeseed, jatropa, mahua, flaxseed, mustard, sunflower, palm, jute and some types of algae are CULTIVATED. |
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| 8114. |
Strong personality, friendly behaviour, Trust in others, Alcoholic. |
| Answer» SOLUTION :ALCOHOLIC. It is an ADDICTION and leads to stress while rest are good for SOCIAL HEALTH. | |
| 8115. |
Identify the nature of poles (X and Y) of the magnets in a given figure . |
Answer» SOLUTION :
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| 8116. |
Material medium is needed for the propagation of light. |
| Answer» SOLUTION :Correct statement-Material MEDIUM is not needed for the propagation of light. | |
| 8117. |
What will happen if in a compound microscope , the objective lens is large in size and has a focal length ? |
| Answer» Solution :If the objective lens of a compound microscope is large in SIZE, in ADDITION to the light coming from an ojbect , other unwanted light will be incident on the objective lens. Hence , the IMAGE will not be seen clearly. If the objective lens has a large focal length, the MAGNIFICATION produced by it will be LESS. | |
| 8118. |
The Reni village of Garhwal is famous for |
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Answer» MONOCULTURES of pine, TEAK and eucalyptus. |
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| 8119. |
Our lifestyle has been changed to some extent in this age of technology. Each person is busy with own daily routine work and favourite job only. How much is it scientifically correct ? |
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Answer» SOLUTION :a. Every person today is busy with own daily routine WORK and favourite job, which does not give him much time to interact with friends and other PEOPLE of the society. b. This keeps him unaware of the events occurring in his SOCIAL ENVIRONMENT. c. His social development is impaired and this affects his social health. Thus, the behaviour of every person today and his lifestyle are not appropriate for a healthy living and hence scientifically incorrect. |
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| 8120. |
Though tortoise lives on land as well as in water , it cannot be included in class Amphibia. |
| Answer» Solution :When tortoise LIVES on the land , it respires with the help of lungs. When in water, it puts out its nares (nasal opening) out of the water and brathes air. It cannot take up oxygen dissolved in water . In both the habitats it respires with the HELPOF lungs. Incase of true amphibians , this is not the case . They can breathe in water with the help of SKIN and on land with the help of lungs . Tortoise also has exoskeleton which is LACKING in AMPHIBIA. Therefore, tortoise cannot be included in class Amphibia. | |
| 8121. |
A light ray passing throught principal focus, passes underviated. |
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| 8122. |
What will happens to current passing through a conductor if potential difference across it is doubled and the resistance is halved? |
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Answer» REMAINS unchanged |
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| 8123. |
All ............. do not revolve in similar orbits around the earth. |
| Answer» SOLUTION :ARTIFICIAL SATELLITES | |
| 8125. |
Complete the paragraph with the help of words given in the bracket : (Luteinizing hormone, endometrium of uterus, follicle stimulating hormone, estrogen, progesterone, corpus luteum, Ovarian follicle along with oocyte, ectometrium of uterus) Growth of folliclespresent in the ovary occurs under the effect of ...................... .This follicle secretes estrogen. ........................ grows / regenerates under the effect of estrogen. Under the effect of ..........................., fully grown up follicle bursts, ovulation occurs and ....................... is formed from remaining part of follicle. It secretes ................... and ....................... . Under the effect of these hormones, glands of ............................ are activated and it becomes ready for implantation. |
| Answer» Solution :Growth of follicles present in the ovary occurs under the EFFECT of follicle stimulating hormone. This follicle secretes estrogen. Ovarian follicle along with oocyte grows / regenerates under the effect of estrogen. Under the effect of Luteinizing hormone, fully grown up follicle bursts, ovulation occurs and corpus LUTEUM is formed from REMAINING part of follicle. It secretes estrogen and progesterone. Under the effect of these hormones, glands of endometrium of uterus are activated and it BECOMES ready for implantation. | |
| 8126. |
Which of these is responsible for the formation of rainbow? |
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Answer» All of these |
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| 8127. |
The distance travelled by a freely falling body is propotional to |
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Answer» the MASS of the BODY |
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| 8128. |
{:("Waves",,"Range"),((i)"Audible",-,(a)340ms^(-1)),((ii)"Sound",-,(b)"greater then "20kHz),((iii)"Infrasonic",-,(c)20-20 kHZ),((iv)"Light",-,(d)"below" 20 Hz),((v)"Ultrasonic",-,(e)3xx10^(8)ms^(-1)):} |
| Answer» SOLUTION :(i) © 20-20 kHz (II) (a) `340ms^(-1)` (III) (d) below 20 HZ (iv) (e) `3xx10^(8)ms^(-1)` (v) (b) greater then 20kHz | |
| 8129. |
If the netforce actingona body be zero , then will the body remain necessarily in restposition ? |
| Answer» Solution :No, the body may be in UNIFORM MOTION along a STRAIGHT LINE. | |
| 8130. |
When a ray of light moves from a rarer medium to a denser medium , the ray bends away from the normal. |
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| 8132. |
A sphere of radius 'r' is rolling without sliding. What is the ratio of rotational kinetic energy and total kinetic energy associated with sphere |
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Answer» `2/7` `I=2/5 MR^(2), E_(r) =7/10 mV^(2)` `E_("not")/(E_("trans")) =(1/5 mV^(2))/(7/10 mV^(2)) =2/7` |
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| 8133. |
Why are solar cooker covered with glass panes? |
| Answer» SOLUTION :GLASS pane is used to trap heat RADIATION which RAISES the temperature inside the box | |
| 8134. |
"resuse is better than recycling of materials ". Given reasons to justify this statements . |
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Answer» Solution :Reuse refers to the use of the same material again and again. In reuseof MATERIALS no energy is CONSUMED and the RESOURCES are saved. In recycling certain used materials are converted into other useful materials. In recycling of materials , energy is consumed and the resources may be wasted. Thus , it can be said that reuse is betterthan recycling. |
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| 8135. |
The changesin focal length of an lens is caused by the action of the |
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Answer» PUPIL |
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| 8136. |
A solid sphere of radius 'r' is rolling with velocity V on a smooth plane. The total kinetic energy of sphere is |
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Answer» `7/10 MV^(2)` |
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| 8137. |
A spring balance is attached to the ceiling of a lift. When the lift is at rest spring balance reads 49 N of a body hang on it. If the lift moves : (i) Downward (ii) upward, with an acceleration of 5ms^(-2). (iii) with a constant velocity. What will be the reading of the balance in each case ? |
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Answer» SOLUTION :(i) `R=m(g-a)` weight =49N so `m=(49)/(9.8) =5kg ` R=5(9.8-5) R=24N (ii) R=m(g+a) R=5(9.8+5) R=74N (III) as a=0 so R=mg =49N |
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| 8138. |
The proper procedureof theexperimentto showthatzincis morereactivethancopperis ______. |
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Answer» Preparea coppersulphatesolutionand immersea copperplatein it . |
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| 8139. |
One word is incorrect in the statement . Change it to make the statement correct : Animals belonging to phylum Annelida perform locomotion with the help of tube - feet. |
| Answer» Solution :Animalsbelonging to PHYLUM Echinodermataperform LOCOMOTION with the HELP of TUBE - feet. | |
| 8140. |
Sun spots : Atmospheric type of disaster : : Salinization : ….. |
| Answer» SOLUTION :GEOLOGICAL TYPE of DISASTER | |
| 8141. |
State a condition for no refraction of light entering from one medium to another. |
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Answer» Solution :(i) LIGHT incident normally. (II) Equal refractive INDEX of TWO media. |
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| 8144. |
Nameand state the two rules for finding the direction of magnetic field produced by an electric current through a straightconductor. |
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Answer» Solution :The DIRECTION of themagnetic field produced by a currentcarrying straight conductor. can be obtained by using(i) Right hand thumb, rule, and (ii) Maxwell.s CORKSCREW rule. i] Right-hand thumb rule : Ifthe current-carryingstraight wire is held in the right hand with the thumb pointing TOWARDS the direction of current, then the direction of fingersencircling the conductorgive the direction of themagnetic field . ii] Maxwell.s cockscrewrule: If a right handed screw is rotated along the current carrying straightwire in the direction of current , then the directionin which the screw rotates GIVES the direction of the magnetic field . |
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| 8145. |
Assertion (A) : Magnification of a real image is negative but magnification of a virtual image is positive. Reason (R) : Real image is an inverted image but virtual image is an erect image. |
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Answer» Both (A) and (R) are true and (R) is correct explanation of the assertion. |
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| 8146. |
The near-point of a person suffering from hypermetropia is at 50 cm from his eye. What is the nature and power of the lens needed to correct this defect ? (Assume that the near-point of the normal eye is 25 cm). |
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| 8147. |
The terms hot and cold are used in relative context. Explain. |
Answer» Solution :(1) Take THREE large BOWLS,P,Q and R. Fill bowl P with COLD water, bowl Qwith lukewarm water, and bowl R with hotwater. (2) Immerse your right HAND in bowl P, and left hand in bowl R for about five second,  (3) Now,immerse both the hands in bowl Q at the same time. (4) You will FIND that the water in bowl Q appears warm to your right hand, and cold to your left hand. Thus , the hand immersed in cold water for some time finds the lukewarm water hot while the one immersedin hot water finds the same lukewarm water cold.This experiment shows that the terms hot and cold are relative.
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| 8148. |
Power generation based on coal has higher efficiency than power generationbased on natural gas. |
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| 8149. |
400 J of heat is produced in 4 s in a 4 Omegaresistor. Find potential difference acroes the resistor. |
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Answer» Solution :`(V^(2))/(R)xxt=400` or `V^(2)=400` or `V=20` VOLT . |
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| 8150. |
Why do we put cushions on the chairs, carpet on the floor, straw materials on the walls in cinema halls? |
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Answer» Solution :1) These materials ABSORB unnecessary reflections of sound, so that we can hear more CLEARLY. 2) As these MATERIAL absorb reflected sound waves, the people outside the cinema halls, cannot hear the sound produced in the cinema hall. |
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