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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. |
Question 17Why is the ceiling and wall behind the stage of good conference halls or concert halls made curved? |
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Answer» Question 17 Why is the ceiling and wall behind the stage of good conference halls or concert halls made curved? |
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| 252. |
A machine gun fires n bullets per second with speed u and mass of each bullet is m.If bullets hit a wall and rebounds with same speed then force acting on the wall is:- (1) nmu (2) 2nmu (3) 4nmu (4) nmu/ |
| Answer» A machine gun fires n bullets per second with speed u and mass of each bullet is m.If bullets hit a wall and rebounds with same speed then force acting on the wall is:- (1) nmu (2) 2nmu (3) 4nmu (4) nmu/ | |
| 253. |
A magnet performs 10 oscillations per minute in a horizontal plane at a place where the angle of dip is 45^0 and the total intensity is 0.707 CGS units.The number of oscillations per minute at a place where dip angle is 60^° and total intensity is 05 CGS units will be(a) 5(c) 9(b) 7(d) 11 |
| Answer» A magnet performs 10 oscillations per minute in a horizontal plane at a place where the angle of dip is 45^0 and the total intensity is 0.707 CGS units.The number of oscillations per minute at a place where dip angle is 60^° and total intensity is 05 CGS units will be(a) 5(c) 9(b) 7(d) 11 | |
| 254. |
How much force will be applied on an object of mass25 kg to accelerate it to a value of 7 m/sec square . .... |
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Answer» How much force will be applied on an object of mass25 kg to accelerate it to a value of 7 m/sec square . .... |
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| 255. |
if momentum of an object is invreased by 10percent what will the kinetic energy |
| Answer» if momentum of an object is invreased by 10percent what will the kinetic energy | |
| 256. |
The correct expression for enthalpy of combustion is |
| Answer» The correct expression for enthalpy of combustion is | |
| 257. |
Two objects of mass 3 kg and 2kg are moving opposite to each other with velocity of 5 m/s and 10 m/s collides find their final velocities ,if the coefficient of restitution is 1 and 0 respectively |
| Answer» Two objects of mass 3 kg and 2kg are moving opposite to each other with velocity of 5 m/s and 10 m/s collides find their final velocities ,if the coefficient of restitution is 1 and 0 respectively | |
| 258. |
What type of scans are used these days to monitor the growth of developing baby in the uterus of the mother ? |
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Answer» What type of scans are used these days to monitor the growth of developing baby in the uterus of the mother ? |
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| 259. |
Match the following liquids to their corresponding column heights (h1,h2,h3) in a barometer. (h1>h2>h3) |
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Answer» Match the following liquids to their corresponding column heights (h1,h2,h3) |
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| 260. |
What is the buoyant force experienced by a cube of side 10 cm which is completely immersed in water?(Take g=10 m s−2 and density of water =1000 kg m−3) |
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Answer» What is the buoyant force experienced by a cube of side 10 cm which is completely immersed in water? (Take g=10 m s−2 and density of water =1000 kg m−3) |
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| 261. |
A beaker is filled with water to its brim. A child while playing drops his ball of mass 1 kg into it and eventually ends up with wetting himself with water. He weighs the water fallen on him and found it to be 1 N. Find the buoyant force experienced by the ball. (Assume that the ball drops slowly) |
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Answer» A beaker is filled with water to its brim. A child while playing drops his ball of mass 1 kg into it and eventually ends up with wetting himself with water. He weighs the water fallen on him and found it to be 1 N. Find the buoyant force experienced by the ball. (Assume that the ball drops slowly) |
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| 262. |
If acceleration a = 3x2, where x is position then velocity is proportional to |
| Answer» If acceleration a = 3x2, where x is position then velocity is proportional to | |
| 263. |
2. O is the point object and I is the point lying on reflected ray from plane mirror MM'.if P is the point of incidence on the mirror and part of mirror AB is of length 2h.the length of part of incident and reflected rays (OP+PI) is |
| Answer» 2. O is the point object and I is the point lying on reflected ray from plane mirror MM'.if P is the point of incidence on the mirror and part of mirror AB is of length 2h.the length of part of incident and reflected rays (OP+PI) is | |
| 264. |
The relative density of a substance is 7, the density of the substance is |
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Answer» The relative density of a substance is 7, the density of the substance is |
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| 265. |
ntDerive the formulas for the electric field applied on the point placed around the dipole but not on axial or equitorial position.n |
| Answer» ntDerive the formulas for the electric field applied on the point placed around the dipole but not on axial or equitorial position.n | |
| 266. |
a parallel plate capacitor of C connected to a battery and is charged to a potential difference v .another capacitor of 2C is also charged to 2v .the charging battery is now disconnected and the capacitors are connected in parallel in such a way that positive terminal of battery is conned to negative terminal of another one .the final energy of tye system is . |
| Answer» a parallel plate capacitor of C connected to a battery and is charged to a potential difference v .another capacitor of 2C is also charged to 2v .the charging battery is now disconnected and the capacitors are connected in parallel in such a way that positive terminal of battery is conned to negative terminal of another one .the final energy of tye system is . | |
| 267. |
Define current. Define one ampere of current. [2 MARKS] |
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Answer» Define current. Define one ampere of current. [2 MARKS] |
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| 268. |
A body floats or sinks due to the difference in their: |
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Answer» A body floats or sinks due to the difference in their: |
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| 269. |
What is focal point? |
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Answer» What is focal point? |
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| 270. |
Difference between negative acceleration and deceleration |
| Answer» Difference between negative acceleration and deceleration | |
| 271. |
What produces magnetism in the human body ? |
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Answer» What produces magnetism in the human body ? |
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| 272. |
26.Body weighs 150 g in air, 120 g in water and 126 g in oil . The specific gravity of oil is |
| Answer» 26.Body weighs 150 g in air, 120 g in water and 126 g in oil . The specific gravity of oil is | |
| 273. |
Why planets revolve around in elliptical orbits they may have different paths to go around and why only in elliptical why not in circular path |
| Answer» Why planets revolve around in elliptical orbits they may have different paths to go around and why only in elliptical why not in circular path | |
| 274. |
The ratio of the density of a substance to the density of water is usually referred as: |
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Answer» The ratio of the density of a substance to the density of water is usually referred as: |
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| 275. |
Two bodies are having equal momentum. Whose kinetic energy is greater?? |
| Answer» Two bodies are having equal momentum. Whose kinetic energy is greater?? | |
| 276. |
57.If an object moves towards a plane mirror with a speed V, the image of the object will move towards the mirror with the speed 2V. explain why? |
| Answer» 57.If an object moves towards a plane mirror with a speed V, the image of the object will move towards the mirror with the speed 2V. explain why? | |
| 277. |
The relation between the time t and position x for a particle moving on x-axis is given by t = px² + qx, where p and q are cons†an ts. The relation between velocity v and acceleration a is as 1 )a\propto v² 2)a\propto v³ 3)a\propto v⁴ 4)a\propto |
| Answer» The relation between the time t and position x for a particle moving on x-axis is given by t = px² + qx, where p and q are cons†an ts. The relation between velocity v and acceleration a is as 1 )a\propto v² 2)a\propto v³ 3)a\propto v⁴ 4)a\propto | |
| 278. |
Equal masses of water and a liquid of density 2 are mixed together, then the mixture has a density of 4n , where n is ___ |
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Answer» Equal masses of water and a liquid of density 2 are mixed together, then the mixture has a density of 4n , where n is |
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| 279. |
The people in a bus are pushed backwards when the bus starts suddenly due to |
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Answer» The people in a bus are pushed backwards when the bus starts suddenly due to |
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| 280. |
If a car covers 25th of the total distance with v1 speed and 35th of the total distance with v2 speed, then the average speed of the car is |
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Answer» If a car covers 25th of the total distance with v1 speed and 35th of the total distance with v2 speed, then the average speed of the car is |
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| 281. |
A man throws a ball weighing 500gm vertically upwards with a speed of 10 m/sec. What will be its initial momentum and what would be it's momentum at highest point of flight. |
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Answer» A man throws a ball weighing 500gm vertically upwards with a speed of 10 m/sec. What will be its initial momentum and what would be it's momentum at highest point of flight. |
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| 282. |
An object approaches a convex mirror of focal length 25 cm with speed 10 metre per second. What will be velocity of image when object is 25 cm from the mirror? |
| Answer» An object approaches a convex mirror of focal length 25 cm with speed 10 metre per second. What will be velocity of image when object is 25 cm from the mirror? | |
| 283. |
In a hydroelectric power plant, moving water is used for driving the wheels of a turbine to generate electricity. If the change in kinetic energy of turbine is 1200 J in 2 minutes then the power generated is |
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Answer» In a hydroelectric power plant, moving water is used for driving the wheels of a turbine to generate electricity. If the change in kinetic energy of turbine is 1200 J in 2 minutes then the power generated is |
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| 284. |
A nucleus with Z = 92 emits the following in a sequence: α, β−, β−, α, α, α, α, α, β−, β−, α, β+, β+, α . Then, the Z of the resultant nucleus is |
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Answer» A nucleus with Z = 92 emits the following in a sequence: α, β−, β−, α, α, α, α, α, β−, β−, α, β+, β+, α . Then, the Z of the resultant nucleus is |
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| 285. |
40.: if a ball is thrown vertically upwards with speed u.the distance covered during the last t seconds of its ascent is? (a)ut (b)1/2gt² (c)ut-1/2gt² (d)u+gt Click here to view details: |
| Answer» 40.: if a ball is thrown vertically upwards with speed u.the distance covered during the last t seconds of its ascent is? (a)ut (b)1/2gt² (c)ut-1/2gt² (d)u+gt Click here to view details: | |
| 286. |
Define 1 joule of energy. |
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Answer» Define 1 joule of energy. |
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| 287. |
What is the weight of a 1 kilogram mass on the earth ? (g=9.8m/s2). |
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Answer» What is the weight of a 1 kilogram mass on the earth ? (g=9.8m/s2). |
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| 288. |
Time of oscillation t of a small drop of liquid under surface tension depends upon the density d the radius r and surface tension prove dimensionally that t=√dr³/√3 |
| Answer» Time of oscillation t of a small drop of liquid under surface tension depends upon the density d the radius r and surface tension prove dimensionally that t=√dr³/√3 | |
| 289. |
why molarity varies with temperature |
| Answer» why molarity varies with temperature | |
| 290. |
Choose the correct option(s) When the temperature of air in over a region increases: |
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Answer» Choose the correct option(s) |
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| 291. |
The focal length of a convex lens is 20 cm. If an object is kept at a distance of 100 cm from the lens, find out the distance of the image formed from the lens. |
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Answer» The focal length of a convex lens is 20 cm. If an object is kept at a distance of 100 cm from the lens, find out the distance of the image formed from the lens. |
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| 292. |
Suppose a spring is kept in a compressed position.Keeping it in this position,the spring is melted. Where does the elastic potential energy go? 🙏 |
| Answer» Suppose a spring is kept in a compressed position.Keeping it in this position,the spring is melted. Where does the elastic potential energy go? 🙏 | |
| 293. |
What happens to the loudness of a sound if its amplitude decreases ? |
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Answer» What happens to the loudness of a sound if its amplitude decreases ? |
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| 294. |
Four point charges qA=2/1000000c, qB=-5/1000000, qC=2/1000000C and qD=-5/1000000 are located at corners of a square ABCD of side 10cm. What is the force on the charge of 1/1000000c placed at the centre of the square. |
| Answer» Four point charges qA=2/1000000c, qB=-5/1000000, qC=2/1000000C and qD=-5/1000000 are located at corners of a square ABCD of side 10cm. What is the force on the charge of 1/1000000c placed at the centre of the square. | |
| 295. |
(i) What do you mean by heat?(ii) How is the temperature of an object measured?(iii) Why conduction is possible only in solids? |
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Answer» (i) What do you mean by heat? (ii) How is the temperature of an object measured? (iii) Why conduction is possible only in solids? |
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| 296. |
How many constellations are there in the sky? |
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Answer» How many constellations are there in the sky? |
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| 297. |
plot the graph between number of molecules and weight in gram for CH4. also find out the slope. |
| Answer» plot the graph between number of molecules and weight in gram for CH4. also find out the slope. | |
| 298. |
A block of mass 'M' is pulled along a smooth horizontal surface with a rope of mass 'm' by applying a force 'F'. The acceleration of the block will be? |
| Answer» A block of mass 'M' is pulled along a smooth horizontal surface with a rope of mass 'm' by applying a force 'F'. The acceleration of the block will be? | |
| 299. |
The real inage of an object placed at a dis†an ce of 20cm from a concave mirror .Find the focal length of the mirror ? |
| Answer» The real inage of an object placed at a dis†an ce of 20cm from a concave mirror .Find the focal length of the mirror ? | |
| 300. |
Question 8 The zeros of the quadratic polynomial x2+kx+k where k≠0 (A) cannot both be positive (B) cannot both be negative (C) are always unequal (D) are always equal |
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Answer» Question 8 The zeros of the quadratic polynomial x2+kx+k where k≠0 (A) cannot both be positive (B) cannot both be negative (C) are always unequal (D) are always equal |
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