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. |
Who developed the Braille system and when? |
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| 252. |
Similar objects are dropped into two different liquids A and B. The displacement of the objects in A and B in 5s is S_(1) " and " S_(2), respectively. If density of the liquid A is greater than the density of the liquid B, which among the following relation is correct ? |
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Answer» `S_(1) = S_(2)` |
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| 253. |
The bob of an oscillating simple pendulum arrives at one of the extreme positions 100 times in 200s. Then, the time period of the pendulum is ____ |
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Answer» `2.5` |
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| 255. |
Choose the correct option (Multiple choice questions) : Eyesight may be lost due to________. |
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Answer» disease |
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| 256. |
Find the work done if a force of 1000 N is applied on a load and the load moves through a distance of 50 cm. |
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Answer» Solution :Force = 1000 N DISTANCE = 50 cm = `50/100`m =0.5 m Work DONE = Force X Distance = 1000 N x 0.5 m = 500 J |
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| 257. |
Name the forces acting on a plastci bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion. |
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| 258. |
What would happen if I threw the light on the mirror along the normal? |
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| 259. |
A tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A whiIe it glows very dimly for liquid B. You would conclude that |
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Answer» LIQUID A is a better conductor than liquid B. |
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| 260. |
_______ can be observed just before sunrise or just after sunset, near the horizon. |
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Answer» Venus |
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| 261. |
Calculate the time taken by a 25 W bulb to transform 3000 J of energy. |
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| 262. |
Industries which produce smoke and ash should be installed with_______to minimise air pollution. |
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Answer» ELECTRIC precipitators |
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| 263. |
When a person jumps up, |
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Answer» he EXERTS a FORCE on the GROUND |
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| 264. |
The time period of a simple pendulum is given by T = 2pi sqrt((l)/(g)) where 'l' is the length of the pendulum and 'g' is the acceleration due to gravity at that place. (a) Express 'g' in terms of T (b) What is the length of the seconds pendulum ? (Take g = 10 m s^(-2)) |
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Answer» Solution :(i) `T = 2pi sqrt((l)/(g))` (1) Square EQUATION (1) on both the SIDES write g in TERM of 'l' and ''T''. (ii) 101 CM |
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| 265. |
The volume of 60 g of a substance is "20 cm"^2. If the density of water is 1 "g/cm"^3, will the substance sink or float in water? |
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| 267. |
How would mapping of the lines of force differ in two bar magnets of unequal pole strength ? On the basis of this concept , explain the statement 'magnetic induction is directly proportional to the strength of the induced magnet'. |
| Answer» Solution :Mapping of lines of force DIFFER in the number of lines of force that are coming out or going into the magnetic poles of BAR magnets. If the POLE STRENGTH of the magnet is more then the number of lines of force will be more compared to a magnet whose pole strength is less. since the lines of force INTERACTING is more the magnetism induced will be more | |
| 268. |
Phases of the moon occur because |
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Answer» we can SEE only that part of the moon which reflects light toards US. |
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| 269. |
In a circuit, abattery can be represented by |
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| 270. |
Can we make a tester using the magnetic effect of currents? |
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| 271. |
The distance of Alpha Centauri from the Earth is _______ light year. |
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Answer» 4.8 |
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| 272. |
During lightning, thunder is produced due to |
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Answer» a suddenexpansion of air DUE to intense heat. |
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| 273. |
What causes tremors of earthquakes? |
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| 274. |
The breadth of an iron door is 2.4 m. If the minimum torque required to open the door is 50 Nm, what is the minimum force required to open the door? |
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| 275. |
What is the refractive index in a medium where the speed of light is 1.5xx10^8 m/s ? |
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| 276. |
What is the full form of lAU? |
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| 278. |
When we hear a lightning and no shelter is available, what should we do to protect ourself? |
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| 279. |
Take a bucket or a bathtub. Fill it with clean water. Take a small bell in one hand. Shake this bell inside the water to produce sound. Make sure that the bell does not touch the body of the bucket or the tub. Place your ear gently on the water surface . (Be careful: the water should not enter in your ear.) Can you hear the sound of the bell? Does it indicate that sound can travel through liquids? |
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Answer» Yes, this INDICATES that sound can travel through LIQUIDS. |
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| 281. |
The weight of the liquid displaced by a body when the body is immersed in it is called, |
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Answer» APPARENT weight |
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| 282. |
Is it easier to hold a kulhar (earthen pot) or a glass tumbler? |
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| 283. |
The energy possessed by steam produced by geothermal energy is _________ |
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Answer» POTENTIAL energy |
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| 284. |
Assertion: Magnetic lines of force never intersect. Reason: The direction of magnetic lines of force in a magnetic field is from north to south. |
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Answer» ASSERTION and REASON are CORRECT and reason is the correct EXPLANATION |
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| 285. |
When force applied on an object causes it to moves in the direction of force |
| Answer» SOLUTION :When force applied on an OBJECT causes it to move in the DIRECTION of force | |
| 286. |
A crowbar is of length 3 m. Where should the fulcrum be placed along the length of the crowbar so that a boulder of 9 kg_(wt) be lifted with it by applying an effort of 10 N?(g = 10 m s^(-2)) |
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Answer» Solution :Find the length of the crowbar. Find the value of the effort from given data Find the value of the load from the given data. (Convert it into S.I. UNITS). Now, load `xx` load arm = effort X effort arm (1) Substitute the values of load and effort. Find the ratio of the load arm to effort arm from EQUATION (1) Here, load arm + effort arm = 3 m. Now, find the POSITION of the fulcrum from the load arm. Is load arm = `(1)/(10)` th part of 3 m? |
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| 287. |
Water waves are |
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Answer» TRANSVERSE |
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| 288. |
The sudden fall in pressure due to a rise in humidity indicates |
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Answer» a cyclone |
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| 289. |
If the time between two successive compressions of a wave is 5 seconds, then the time taken to complete 4 successive compressions is ____ |
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Answer» 5 seconds |
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| 290. |
The space surrounding a magnet within which its magnetic effect is felt is called |
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| 291. |
When we mention the charge of body we indicate only the deficit or excess of electrons in it but not protons. Why? |
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Answer» Solution :(i) Protons PRESENT INSIDE the NUCLEUS (II) Protons bound to the nucleus |
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| 292. |
The roof of a house blows out during a storm because |
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Answer» the WIND blows with high velocity under the ROOF. |
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| 294. |
Who landed on the moon,the first time and when? |
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| 296. |
What is atmospheric pressure? |
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| 297. |
The value of acceleration due to gravity increases as we move from equator to poles. For a given simple pendulum, a comstant time period can be achieved by _____ its length correspondingly. |
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| 298. |
How much energy will 1 kg mass of wood yield on complete combustion if its calorific value were 18 kJ g^(-1)? |
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Answer» Solution :(i) DEFINITION and formula for CALORIFIC value. (ii) Find the amount of mass of FUEL (m) and its calorific value (s). CONVERTS the calorificvalue in terms of `J kg^(-1)` Then, the amount of heat energy (Q) released will be Q=ms Substitute the value of 'm' and 's' and find the value of Q 18 MJ |
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| 299. |
An empty RD bottle weighs 30.5 g. When completely filled with water, it is found to weigh 60.5 g. When filled with alcohol it is found to weigh 53.5 g. What is the relative density of alcohol? |
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| 300. |
At a place, the solar energy incident in one second is 640 J, on an area of one square metre. Assuming that all the solar energy is absorbed by 10 kg water, incident on its surface of area 400 cm^(2). How much time will it take to raise its temperature by 70^(@)C? (specific heat capacity of water is 4.2 J g^(-1) .^(@)C^(-1)) |
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Answer» Solution :(i) Total energy= (Energy incident per unit area) x( total area) x (total time) `Q=msDeltatheta` (ii) Find the change in temperature. Find the mass of water and its SURFACE area over which LIGHT is made to be incident from the given data. convert surface area in S.I system Find the solar energy incident in one second per square METER? find the amount of heat energy (Q) required to raise the temperature of water from formula `Q =msDelta THETA` Find the amount of solar energy incident in one second on water surface. It is equal to (640x 0.04) ? Then find the time taken to produce Q amount of heat by solar energy which can be found out by DIVIDING (1) by (2) . (iii) 31.9 hour |
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