Basic concept of physics | Lec 8 | त्रुटियों का संयोजन | 11th Physics | By Gopal Sir | Doubtnut

यूपी बोर्ड ने जारी किया Class 12th Physics का नया Syllabus

Read the following information carefully to answer the questions that follow. In a survey of 25 students, it was found that 15 have taken Mathematics. 12 have taken Physics and 11 taken Chemistry, 5 have taken Mathematics and Chemistry, 9 have taken Mathematics and Physics, 4 have taken Physics and Chemistry and 3 have taken all the three subjects. The number of students who have taken only two subjects, is (a)7 (b)8 (c)9 (d)10

There is a concept that if unit of a physical quantity is large then the multiplier of the unit becomes less while expressing any fixed magnitude. If in a new system of unit, unit of time is 0.5 second and the unit of length is 4 metre. Answer the following questions. If unit of time is doubled, the unit of length is halved and unit of mass is increased by a factor n such that a particular force retains its value in both th system of units then the value of n is :

The marks obtained out of 50, by 102 students in a Physics test are given in the frequency table below: Marks (x) : 15 20 22 24 25 30 33 38 45 Frequency (f) : 5 8 11 20 23 18 13 3 1 Find the average number of marks.

Solve the following crossword using the given clues: ACROSS 3. Principle relating to the apparent weight of a body when immersed in water. 6. Pressure caused by the weight of the air 7. Forces that require physical contact between objects 10. The force that exists between two magnets. 11. Unit of force 12. The resistance to movement that occurs when two bodies are in contact 13. The state when aperson does not feel any sensation of weight. DOWN 1. The pull of the earth 2. SI unit of pressure 4. Measure of the amount of matter in a physical body 5. The upward force that a fluid exerts on an object that is immersed in the fluid. 8. The force with which the earth pulls a body towards its centre. 9. Something that tends to cause movement of a body.

There of the fundamental constant of physics are the universal gravitational constant, G=6.7xx10^(-11) m^(3) kg^(-) s^(-2) , the speed of light c=3.0xx10^(8) m//s and Planck's constant, h=6.6xx10^(-34) Js^(-1) . two particles A and V are projected in the vertical plane with same initial velocity u_(0) fro part (0,0) and (l,-h) towards each other as shwon in figure The path of particle A with respect to particle B will be –

There of the fundamental constant of physics are the universal gravitational constant, G=6.7xx10^(-11) m^(3) kg^(-) s^(-2) , the speed of light c=3.0xx10^(8) m//s and Planck's constant, h=6.6xx10^(-34) Js^(-1) . two particles A and V are projected in the vertical plane with same initial velocity u_(0) fro part (0,0) and (l,-h) towards each other as shwon in figure Minimum distance between particle A and B during motion

There of the fundamental constant of physics are the universal gravitational constant, G=6.7xx10^(-11) m^(3) kg^(-) s^(-2) , the speed of light c=3.0xx10^(8) m//s and Planck's constant, h=6.6xx10^(-34) Js^(-1) . two particles A and V are projected in the vertical plane with same initial velocity u_(0) fro part (0,0) and (l,-h) towards each other as shwon in figure The time when separation between A and B is minimum is