Conceptual Questions Based on Class 12 Physics Chapter 1 Electric Charges and Fields’ Q.1. Is the mass of a body affected on charging? Solution. Yes. Electrons have a definite mass. The mass of a body slightly increases if it gains electrons while the mass decreases if the body loses electrons. Q.2. Can two like charges … Read more
Conceptual Questions Based on Class 12 Physics Nuclei Here we are providing conceptual questions based on Class 12 Physics Nuclei. Students are suggested to go through each and every question for better understanding. Q.1. What is the ratio of the nuclear densities of two nuclei having mass numbers in the ratio 1:4? Solution. As the … Read more
Conceptual Questions Based on Class 12 Physics Atoms Here we are providing conceptual questions for Class 12 Physics Chapter 12 Atoms. Students should go through each and every question for better understanding. Q.1. The large angle scattering is possible only due to nucleus. Why? Solution, α-particles can be scattered through large angles only if they … Read more
Conceptual Questions Based on Class 12 Physics Dual Nature of Radiation and Matter Q.1. What happens to the wavelength of a photon after it collides with an electron? Solution. A photon transfers a part of its energy to the colliding electron, so its energy decreases and consequently wavelength increases. Q.2. Why are alkali metals most … Read more
Conceptual Questions Based on Class 12 Physics Wave Optics Here we are providing conceptual questions based on Class 12 Physics Wave Optics. Go through each and every question for better understanding. Q.1. What are the reasons to believe that light is a wave motion? Solution. Light undergoes interference, diffraction and polarization. These phenomena establish that … Read more
Conceptual Questions Based on Class 12 Physics Optical Instruments Here we are providing conceptual questions based on class 12 physics chapter 9 Optical Instruments. These questions are prepared by experts and are very useful from exam point of view. Students can practice these questions for scoring better marks in the exam. Q.1. How will the … Read more
Conceptual Questions Based on Class 12 Physics Ray Optics Here we are providing conceptual questions based on class 12 physics chapter 9 Ray Optics. These questions are prepared by experts and are very useful from exam point of view. Students can practice these questions for scoring better marks in the exam. Q.1. Why is a … Read more
Here we are providing conceptual questions based on class 12 physics chapter 8 electromagnetic waves. These questions are prepared by experts and are very useful from exam point of view. Students can practice these questions for scoring better marks in the exam. Conceptual Questions Based on Class 12 Physics Electromagnetic Waves Q.1. What is displacement … Read more
Conceptual Questions Based on Class 12 Physics Magnetism and Matter Q.1. Does a magnetic monopole exist? Justify your answer. How magnetic field is produced? Solution. No, a magnetic monopole does not exist. The reason is that a magnetic field is produced by a current loop and not by monopole of a magnet. Q.2. How does … Read more
Conceptual Questions Based on Alternating Current Q.1. Why a d.c. voltmeter and d.c. ammeter cannot read a.c.? Solution. The average value of a.c. over a cycle is zero. So, a d.c. voltmeter/ammeter will show zero reading with alternating voltage/current. Q.2. What is meant by the statement that the current through an inductor lags behind the … Read more
Q.1. Will an induced emf develop in a conductor, when moved in a direction parallel to the magnetic field ? Solution. No, because the magnetic flux linked with the conductor does not change when it is moved parallel to the magnetic field. Moreover, the magnetic Lorentz force on the free electrons of the conductor is … Read more
Conceptual Questions Based on Moving Charges and Magnetism Here we are providing conceptual questions for Class 12 Physics Chapter 4 Moving Charges and Magnetism. Q.1. How is a magnetic field produced ?Sol. A magnetic field can be produced by the following ways: (i) by a magnet (ii) by a current carrying conductor (iii) by a … Read more
Q.1. The resistance of the pn junction is low when forward biased and is high when it is reverse biased. Explain.Answer: The resistance of pn junction is low when it is forward biased because force acts on charge carriers to move them across the junction whereas the force in reverse biasing acts in opposite direction … Read more
Conceptual Questions Based on Current Electricity Here we are providing conceptual questions for Class 12 Physics Chapter 3 Current Electricity. Students are suggested to go through all the questions to understand the chapter well. Q.1. The standard resistance coils are made up of manganin. Why?Answer: When current flows through a wire its temperature will increase. … Read more
Q.1. Why earth is considered to be at zero potential?Answer: Earth has very large size. Potential of earth does not change with small charge therefore it is considered as reference level and potential taken as zero. Q.2. If electric potential V within a certain region is constant, what is the nature of electric field inside … Read more
Q.1. Where is the knowledge of dielectric strength helpful?Answer: Dielectric strength is the maximum value of electric field that can be applied across an insulatorbefore its breakdown or the magnitude of electric field intensity across insulator at which it startsconducting. This value helps us in determining the value of maximum potential, which can be appliedacross … Read more
