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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.
| 8151. |
What. Is. Result |
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| 8152. |
At what condition the position time graph could have negative slope |
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| 8153. |
kirchoff\'s law |
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| 8154. |
What is the mass of the body at the surface of earth ? |
| Answer» Weight divided by acc. Due to gravity | |
| 8155. |
What is thermodynamic equilibrium? |
| Answer» Net external force and torque is zero | |
| 8156. |
Can you please send me physics all derivations? |
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| 8157. |
Explain the variation of acceleration due to gravity with (i) Altitude (ii) Depth |
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| 8158. |
What is a equilibrium |
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Answer» Equilibrium is a state where rate of forward reaction is equal to rate of back word reaction A it is a condition when net force on the system becomes zero. But according to thermodynamics, it is a condition when transfer of heat or energy between the system and surrounding stops |
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| 8159. |
In which motion linear momentum change but K.E. does not |
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| 8160. |
State and prove that 2nd law of motion is real law of motion. |
| Answer» Read ncert chapter force and laws of motionTopic 2 law of motion | |
| 8161. |
State work energy theorm |
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Answer» Work=ΔK Work energy theoram states the "Change in kinetic energy = Work done".Kf - Ki = w |
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| 8162. |
Cornate cycle |
| Answer» Carnot\' cycle is not in syllabus.Only the working of carnot\'s heat engine is in syllabus | |
| 8163. |
Which questions are important to prepare in unit Thermodynamics for final exam? |
| Answer» See the important questions in cbse guide | |
| 8164. |
What happened when waves collied |
| Answer» It is known as superpodition of Waves. The two waves form a third wave with diff properties however light and sound cannot superpose. | |
| 8165. |
Define triple point of water? |
| Answer» The point at which,solid-liquid-gas exist at same point dx | |
| 8166. |
Advantage of viscous force? |
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| 8167. |
Rotational kinetic energy ? |
| Answer» The rotational kinetic energy is the kinetic energy due to the rotation of an object and is part of its total kinetic energy | |
| 8168. |
Name a physical quantity which has unit but no dimensions |
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Answer» Strain Angle. It has units such as radians and steradian but no dimension as it the ratio of two like quantities i.e, length |
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| 8169. |
Derived between constant pressure and constant volume |
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| 8170. |
Derive an expression for centripetal fotce. |
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| 8171. |
At what temperature the Fahrenheit and kelvin scale of temperature give the same reading? |
| Answer» At -40 degree | |
| 8172. |
Jjjjj |
| Answer» This is Australian radio station | |
| 8173. |
"all black surfaces are not good radiators" comment. |
| Answer» Because they are poor absorber | |
| 8174. |
Define all different types of flow ? |
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| 8175. |
What is velocity head. Also write its equation |
| Answer» V^2/2g | |
| 8176. |
Work energy theraom |
| Answer» Total work done by a body is equal to the difference in its kinetic energy | |
| 8177. |
Work energy theoram |
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Answer» Work done by a resultant force of a body is equal to the change in kinetic energy of a body It states that the work done by the net force acting on a body is equals to the change produced in the kinetic energy of the body |
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| 8178. |
Proof of Bernoulli\'s equation |
| Answer» Proof of Bernoulli\'s theorem Consider a fluid of negligible viscosity moving with laminar flow.. Let the velocity, pressure and area of the fluid column be v1, P1 and A1 at Q and v2, P2 and A2 at R.Let the volume bounded by Q and R move to S and Twhere QS = L1, and RT = L2.If the fluid is incompressible: A1L1 = A2L2The work done by the pressure difference per unit volume = gain in k.e. per unit volume + gain in p.e. per unit volume.Now: Work done = force x distance = p x volumeNet work done per unit volume = P1 - P2 k.e. per unit volume = ½ mv2 = ½ Vρ v2 = ½ρv2 (V = 1 for unit volume)Therefore: k.e. gained per unit volume = ½ ρ(v22 - v12) p.e. gained per unit volume = ρg(h2 – h1) where h1 and h2 are the heights of Q and R above some reference level.Therefore: P1 - P2 = ½ ρ(v12 – v22) + ρg(h2 - h1) P1 + ½ ρv12 + ρgh1 = P2 + ½ ρv22 + rgh2 Therefore: P + ½ ρv2 + ρgh is a constantFor a horizontal tube h1 = h2 and so we have: P + ½ ρv2 = a constantThis is Bernoulli\'s theorem You can see that if there is a increase in velocity there must be a decrease of pressure and vice versa.No fluid is totally incompressible but in practice the general qualitative assumptions still hold for real fluids. | |
| 8179. |
What will be the period of oscillation, if the length of the second\'s pendulum ishalved |
| Answer» The period of oscillation increases | |
| 8180. |
Wave |
| Answer» Waves is an oscillation accompained by the transfer of energy | |
| 8181. |
What are elastimeters |
| Answer» It is a battery operated, fully portable indentation instrument for measuring skins instant elasticity.The elastimeter consists of 1 mm length indenter,a reference plate and built-in force sensor. | |
| 8182. |
which type of questions migth come from ch8 |
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| 8183. |
State poisley formula with derivation |
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| 8184. |
At which place on the earth the cebtripetal force is high |
| Answer» Centre of earth | |
| 8185. |
Parallex |
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| 8186. |
pls. tell me all the important derivation of physics for class 11 examinations. |
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Answer» Newton law of colling Laplus correction of Newton law Differential equation of SHM Degree s of freedom Questions based on refrigerator or heat pump Carnot theorem Bernoulli\'s theorem, work energy theorem, relationship between cp -cv, Pascal law |
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| 8187. |
Solutions of cbse last year papers |
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Answer» Kha h Paper |
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| 8188. |
How to calculate the workdone by a veriable force? |
| Answer» By integrating force w.r.t distance | |
| 8189. |
explain under which three condition body will accelerated under effect of external forces |
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| 8190. |
How much should the pressure on a litre of water changed to compress it by 0.10% ? |
| Answer» By law of isotherm,P¹×V¹= P²×V²V²= V¹×10/10000 (given)V²=V¹/1000P¹×1000V²= P²×V²P²= 1000P¹So pressure should be increased by 1000 times | |
| 8191. |
Why moment of inertia is called rotational inertia |
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| 8192. |
What is thermodynamic? |
| Answer» Thermodynamics: thermo: heat and dynamic :Motion. It means heat in motion. Thermodynamics is branch of science which deals with internal energy and we... | |
| 8193. |
What is Newton law of cooling and its dimension |
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Answer» Provided the temp difference s small Newton Law of cooling states that the rate of change of temperature of an object is proportional to difference between its own temperature and the ambient temperature |
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| 8194. |
Dimension of rate of cooling |
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| 8195. |
How to talk to nakhre wali girls |
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Answer» Koi to bata do With ur mouth Priya ji Nakhre wali girls se baat kse kre what??????? |
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| 8196. |
Which will fall first a cricket ball or a basketball? |
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Answer» Coz surface contact of cricket ball is less and so the opposing force will be comparatively less As speed of falling objects depends on its surface area also Bt why..u say that first criket ball is fall.? Can i know the reason A cricket ball |
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| 8197. |
Difference between accuracy and prevision? ? |
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Answer» Closeness to correct value is called accuracy whereas closeness in measured value is called precision accuracy means how much tha data is near to the accurate value .and precision means how much closer of data to accurate value |
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| 8198. |
What is Pascal law? |
| Answer» liquid is in enclosed container ,if an increase in pressure is produce in any part of liquid then it transmitted equally in all direction | |
| 8199. |
Why is it easier to maintain the motion than to start? |
| Answer» Bcoz coefficient of kinetic friction is always less than coefficient of static friction | |
| 8200. |
What is mass energy equivalence? |
| Answer» E=MC2 which states that energy lost is given by this relationship | |