Physics

Important Questions for Class 12 Physics Chapter 14 Semiconductor Electronics Materials Devices and Simple Circuits

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Important Questions for Class 12 Physics Chapter 14 Semiconductor Electronics Materials Devices and Simple Circuits Class 12 Important Questions Semiconductor Electronics Materials Devices and Simple Circuits Class 12 Important Questions Very Short Answer Type Question 1.State the reason, why GaAs is most commonly used in making of a solar cell. (All India 2008)Answer:GaAs is most …

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Important Questions for Class 12 Physics Chapter 13 Nuclei

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Important Questions for Class 12 Physics Chapter 13 Nuclei Class 12 Important Questions Nuclei Class 12 Important Questions Very Short Answer Type Question 1.An electron and alpha particle have the same de-Broglie wavelength associated with them. How are their kinetic energies related to each other?(Delhi 2008)Answer: Question 2.State the reason, why heavy water is generally …

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Important Questions for Class 12 Physics Chapter 12 Atoms

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Important Questions for Class 12 Physics Chapter 12 Atoms Atoms Class 12 Important Questions Very Short Answer Type Question 1. Define ionisation energy. What is its value for a hydrogen atom? (All India 2010)Answer:Ionisation energy : The energy required to knock out an electron from an atom is called ionisation energy of the atom.For hydrogen …

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Important Questions for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter

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Important Questions for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Class 12 Important Questions Dual Nature of Radiation and Matter Class 12 Important Questions Very Short Answer Type Question 1.An electron and alpha particle have the same de-Broglie wavelength associated with them. How are their kinetic energies related to each other? …

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Important Questions for Class 12 Physics Chapter 10 Wave Optics

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Important Questions for Class 12 Physics Chapter 10 Wave Optics Class 12 Important Questions Wave Optics Class 12 Important Questions Very Short Answer Type Question 1.How does the fringe width of interference fringes change, when the whole apparatus of Young’s experiment is kept in a liquid of refractive index 1.3? (Delhi 2008)Answer:Fringe width becomes yL times …

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Important Questions for Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Class 12

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Important Questions for Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Class 12 Important Questions Ray Optics and Optical Instruments Class 12 Important Questions Very Short Answer Type Question 1.Aglasslensof refractive index 1.5 is placed in a trough of liquid. What must be the refractive index of the liquid in order to mark …

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Important Questions for Class 12 Physics Chapter 8 Electromagnetic Waves Class 12

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Important Questions for Class 12 Physics Chapter 8 Electromagnetic Waves Class 12 Important Questions Electromagnetic Waves Class 12 Important Questions Very Short Answer Type Question 1.Name the part of the electromagnetic spectrum of wavelength 10-2 m and mention its one application. (Delhi 2008)Answer:Name of the part: MicrowaveApplications : It is used in radar communication. It is …

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Important Questions for Class 12 Physics Chapter 7 Alternating Current

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Alternating Current Class 12 Important Questions Very Short Answer Type Question 1.The instantaneous current and voltage of an a.c. circuit are given by i = 10 sin 300 t A and V = 200 sin 300 t V. What is the power dissipation in the circuit? (All India 2008)Answer: Question 2.The instantaneous current and voltage …

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Important Questions for Class 12 Physics Chapter 6 Electromagnetic Induction

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Electromagnetic Induction Class 12 Important Questions Very Short Answer Type Question 1.A plot of magnetic flux (ϕ ) versus current (I) is shown in the figure for two inductors A and B. Which of the two has larger value of self inductance? (Delhi 2010)Answer:Since ϕ = LI∴ L = ϕI = slopeSlope of A is greater than …

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Important Questions for Class 12 Physics Chapter 5 Magnetism and Matter

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Magnetism and Matter Class 12 Important Questions Very Short Answer Type VSA Questions 1.The permeability of a magnetic material is 0.9983. Name the type of magnetic materials it represents. (Delhi 2011)Answer:It represents diamagnetic materials. Question 2.The susceptibility of a magnetic material is 1.9 × 10-5. Name the type of magnetic materials it represents. (Delhi 2011)Answer:It …

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