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.
| 251. |
A rice bag of 100 kg is lifted up by four workers to a height of 10 m from the groud . Find the work done by each worker (Assume that four workers muscular energies are equal). |
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| 252. |
How, do you represent a vector geometrically? |
Answer» SOLUTION :A vector can be REPRESENTED by a LINE segment with an arrow HEAD. 
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| 254. |
A cube of 1 m length is under the - pressures given in the figure. Find the magnitude and the directionof the net force on it. |
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Answer» `F_(net)= 10/(1m^(2))= 10 N` vertucally upwards 
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| 255. |
A person is sensing the electric shock means |
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Answer» Current FLOW through him |
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| 256. |
Raju started a piece of work when the hours hand and minutes hand in a wall clock are at 9 and 12, respectively. He completed his work when the hours hand is at a midway between 11 and 12, while the position of the minutes hand is at 6. Find the time taken by him to do the work. |
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Answer» `t_(2)` = 11:30 Time taken = 11.30 - 9:00 = 2 HOUR 30 minutes = 2.5 hours. |
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| 257. |
Is there any standard in India based on which one can rely to buy any electric device. If so, what is it ? |
| Answer» Solution :Yes there is a standard ISI mark given by an AGENCY called Indian Standard Bureau FORMED by the government of India to approve various products . These products are given CERTIFICATION according to the prescribed standards and GOOD QUALITY electricity devices. | |
| 258. |
To open the lid of bottle, 50 N force is needed, Siri wanted to open the lid with her maximum effort of 10 N, which of the following openers is suitable for doing it? |
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Answer» `M_(B)=(8)/(2)=4` `M_(C)=(15)/(3)=5` `E_(A)=(L)/(MA)=(50)/(5)=10N` `E_(B)=(L)/(MA)=(50)/(4)=12.5N` `E_(C)=(L)/(MA)=(50)/(5)=10N` She can use opener A or C to OPEN the lid. |
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| 260. |
Select the correct alternative from the given options.Which among the following is the source of SO_(2) ? |
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Answer» AIR conditioners |
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| 261. |
Distinguish between contact and non- contact forces . |
Answer» SOLUTION :
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| 262. |
Feathers, fins, shell, foots. |
| Answer» Solution :FOOT : It is a PART of the BODY, OTHERS are exoskeleton. | |
| 263. |
{:("Across",|,"Down"),("3. Brain box",|,"1. Place where blood cells originate"),("5. Protect spinal cord",|,"2. Fibres connecting bones to bones"),("7. Organs to smell in insects",|,"4. Breastbone"),("9. Bone in upper arm",|,"6. Fibres connecting muscles to bone"),("10. Place where two bones meet",|,"8. Thigh bone"):} |
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| 264. |
Identify whether the following statements are true or false and rewrite the false statemetns. (a) Vinegar disappears when added to water. (b) Kerosene and petrol form a single layer on mixing. (c) Ground glass is a transparent material. (d) Nitrogen gas is soluble in water. (e) A liquid can have one free surface (f) Solids have moderate intermolecular forces of attraction. (g) Condensation is affected by cooling. |
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Answer» Solution :(a) Vinegar is soluble in water, and hence disappers when added to water. It is a true statement. (b) Kerosene and petrol are miscible liquids, and hence can form a single layer on mixing (C) Ground glass is a transluscent material. (d) Nitrogen gas is insoluble in water. (e) A LIQUID has one free SURFACE that is UPPER surface. (f) Solids have the largest intermolecular forces of attraction while liquids have moderate intermolecular forces of attraction. (g) Condensation of vapour into liquid takes place by COOLING. |
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| 265. |
What will be the change in the length of each small bar magnet when a bigger bar magnet is cut into 4 equal parts parallel to the equatorial line ? |
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Answer» One-fourth of the initial LENGTH HENCE, the correct option is (a). |
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| 266. |
Define the following. (a) Elements (b) Compound (c) Homogenous mixture (d) Heterogeneous mixture (e) Metalloids (f) Noble gases. |
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Answer» Solution :(a) An element can be defined as a pure substance in which a molecule is made up of only one KIND of atom and which cannot be split into simpler SUBSTANCES by any CHEMICAL means. (b) A compound can be defined as a pure substances in which a molecule is made up of more than one kind of atom and can be split up into two or more simpler substances. (c) A homogeneous mixture can be defined as a substance in whcih there is uniform distribution of molecule of different substance. (d) A heterogeneous mixture can be defined as a substance in which there is non-uniform distribution of different kinds of molecules in the substance. (e) METALLOIDS are the elemetns which possess some properties of METALS and some properties of non-metals. (f) Noble gases are gaseous elemetns which do not take part in chemical reactions with any other elements. |
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| 267. |
Magnets made by human beings are called _______ |
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| 268. |
What is force ? Mention the effects of force . |
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Answer» SOLUTION :Force is defined as push or PULL on a BODY. Causes of force: A force can CAUSE a motion in a stationary object. A force can stop the moving objects or slow them down A force can make a moving object move faster. A force can change the direction of moving objects A force can change the shape of objects. |
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| 269. |
What the advantages of an electromagnet ? |
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Answer» Solution :Advantages of an electromagnet : They can be made stronger than any other permanent magnet. These can be magnetized and demagntized easily. Increasing the amount of CURRENT increases the strength of the elecromagnet. POLES of an electromagnet can be interchanged by changing the DIRECTION of current. |
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| 270. |
A crowbar is of 125 cm length. Its fulcrum is at a distance of 25 cm from the load. Find out the mechanical advantage. |
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Answer» Solution :Load arm = 25 cm Effort arm = 125 -25 =100 cm MA=`"LENGTH of effort arm"/"Length of load arm" =100/25`=4 (since MA is a ratio , it has no unit) |
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| 271. |
A tall person 'A' anda short person 'B' stood before a plane mirror. 'A' stands 1.25 metres behind 'B' . If the distance between 'B' and the plane mirror is 50 cm , then the distance between 'A' and his image in the mirror is _______ . |
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Answer» 4 CM Distance between A and B =1.25 m . Therefore, distance between the plane mirror and A=1.25 m + 0.5 m =1.75 m Therefore, distance between A and his IMAGE in the mirror in the mirror `=2xx1.75 `m `=3.5 m` Hence, the CORRECT OPTION is (b). |
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| 272. |
In a class two lever, the load arm is 80 cm long and the distance between the load and the effort is 120 cm. Find the MA. |
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| 273. |
A rod attached to the center of a which is called ______. |
| Answer» SOLUTION : A ROD attached to the center of a WHEEL is called an axle. | |
| 274. |
Abhi who is interested in physics measured the volume of an irregular shaped body with concepts given by his physics teacher. When he immersed the given body in water contained in a measuring jar, the level of water is increased from 500 ml to 1500 ml. Find the volume of the body and also find the length of the edge of the cube whose volume is equal to the volume of the given irregular shaped body. |
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Answer» = 1500 - 50 `= 1000 CM^(3)` Volume of a cube = 1000 `cm^(3)` `"Side"^(3)` = 1000 `therefore` Side = 10 cm |
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| 275. |
The angle between the minutes hand and hours hand in a clock, at 12:30 p.m. is |
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Answer» `GT0^(@)` |
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| 276. |
What is the use of compass for sailors ? |
| Answer» SOLUTION :SAILORS TRAVEL according to the direction shown in the compass, since the MAGNETIC needle aligns itself in the north- south direction . | |
| 277. |
The longest bone in the human body is : |
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Answer» Humerus Hence the correct option is (B). |
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| 279. |
A light ray is incident ona plane mirror making an angle of 90^(@) with the mirror's surface. The angle of reflection of the light is _______ . |
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Answer» Angle of INCIDENCE `=0^(@)` Therefore, angle of reflection `=0^(@)` |
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| 280. |
How can we find out near which end is North Pole located in a bar magnet? |
| Answer» SOLUTION :Hang up the MAGNET by a constant thread so that it hang freely. Whent it comes to REST, we NOTE that magnet is lying in north-south DIRECTION. | |
| 281. |
In a class three lever, the distance between the effort and the load is 40 cm and load arm is 1 m long. Find the length of the effort arm and then calculate MA. |
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| 282. |
Complete the given table. |
Answer» SOLUTION :
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| 283. |
Give any two examples for the following terms. (a) Homogenous opaque medium (b) Heterogeneous transparent medium (c) Homogeneous transparent medium (d) Heterogeneous translucent medium |
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Answer» Solution :(a) Homogeneous opaque medium Example : Wood, metal. (b) Heterogeneous transparent medium Examples : Air , SEA WATER. (C) Homogeneous transparent medium Examples : Pure water, petroleum vapours. (d) Heterogeneous translucent medium Examples : Partially impure water, fog. |
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| 285. |
Mention theessential requirements for rusting of iron. |
| Answer» SOLUTION :ESSENTIAL REQUIREMENTS for rusting are the presence of OXYGEN /AIR and water. | |
| 286. |
Give any one example in which a body travels with retardation and give a reason for the same. |
| Answer» Solution :When a BODY projected upwards its velocity DECREASE, as the GRAVITATIONAL FORCE acts downwards. So, it is said to be moving with RETARDATION. | |
| 287. |
Gas Xisan active component of air . X reacts with caobon to form gas Y. Y is one of the products of _______________ and _____________. |
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Answer» RESPIRATION , combustion |
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| 288. |
Express 5 centimetres in metres. |
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Answer» SOLUTION :1 m = 100 cm implies 1 cm = `10^(-2)`m implies 5 cm = `5 xx 10^(-2)`m Here `10^(-2)` is 'centi' which is a SUBMULTIPLE. |
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| 289. |
Circle the one that is not a natural source of light:Bulb, Sun, Lightning, Stars |
| Answer» SOLUTION :NATURAL sources of light, circle the one that is not a natural SOURCE of light. | |
| 290. |
Which of the following elements is not present in nitrogenous base? |
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Answer» ARGON HENCE, the correct option is (a). |
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| 291. |
Give the importance of vertebral column in human beings. |
| Answer» Solution :VERTEBRAL column is ALSO called backbone. It is strong and fiexible, it is made up of 33 small bones called vartebarate, It encloses and protects the spinal cord and holds and holds the head and body upright. The joints in between vertebrae enable up to BEND or twist by providing flexibility. The fibrous cartilage present in between vertebrae acts as shock abseorber. It human BEINGS, it BEARS the body weight while walking and standing. | |
| 292. |
When a fracture occurs, bones heal naturally without any treatment. |
| Answer» Solution :BONE is aliving tissue and is a storehouse of CALCIUM and phosphorous. When a FRACTURE occurs, new cells are produced in large number and help in joining of the tissue. This helpin healing. Calcium and phosporous taken from the DIET ALSO help in healing process. Dressing is done if the also help in healing process. Dressing is done if the wound is open to protect in from infection. Bandage will give support and helps in keeping the fractured bones in position without moving so that they join together. | |
| 293. |
_____ is the device which is used to open or close the circuit . |
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Answer» Key/switch |
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| 294. |
Name the process you would use to separte a mixture of water and alcohol. |
| Answer» SOLUTION :WATER and alcohol are miscible LIQUIDS and form a homogenous mixture. Water and alcohol differ widely in their boiling points. Therefore ,they can be separated by the process of distillation Alcohol has lower boiling point, and HENCE, vaporises and gets collected in the reciever FLASK. water is left behind in the distillation flask as it has a higher building point. | |
| 295. |
________ phenomenon is used in a reflecting periscope. |
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| 296. |
Namitha is jounalist. She used her pen camera to capture the photographs of a crime that took place on the way to her office. Which of the following is the source of the electrical energy which must be used in the said camera ? |
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Answer» Nickel-cadmium CELLS Hence the correct option is (d) |
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| 298. |
A boy able to lift a bag containing books of 30 N placed at an end of the see-saw by applying a force of 5 N at another end. Find the mechanical advantage of the see-saw. |
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Answer» Solution :LOAD = 30 N Effort = 5 N MECHANICAL advantage=Load/Effort `:.MA=(30)/(5)=6`. |
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| 299. |
Doesthe forces ,like gravitainal ,electric and magnetic forces affect each other ? If not ,why ? |
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| 300. |
Define unit and write any three examples. |
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Answer» SOLUTION :STANDARD REFERENCE of a physical quantity is CALLED its unit. Example: Length - metre, time - second and mass - kilogram. |
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