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Class 12th Physics Chapter 10 Wave Optics VVI Objective Question Wave Optics 1. Electromagnetic wave can be Polarised by (A) a lens (B) a mirror (C) a polaroid (D) a prism Answer:- C 2. Bonding of light rays at sharp obstacles is called : (A) Refraction (B) Diffraction (C) Interference (D) Polarisation Answer:- B 3. If […]
Class 12th Physics Chapter 8 Electro-Magnetic Waves VVI Objective Question Electro-Magnetic Waves 1. Which has the longest wavelength? (A) Radio waves (B) X-rays (C) Ultraviolet rays (D) Infrared Answer:- A 2. Which of the following has a minimum wavelength? (A) X-Rays (B) Y-Rays (C) Micro Wave (D) Radio wave Answer:- B 3. The frequency range of […]
Class 12th Physics Chapter 6 Electromagnetic Induction VVI Objective Question ELECTROMAGNETIC INDUCTION 1. Unit of self-induction is (A) Weber Title (B) Ohm (C) Henry (D) Gauss Answer:- C 2. The direction of eddy current is obtained using (A) Kirchhoff’s laws (B) Lenz’s law (C) Planck’s law (D) none of these Answer:- B 3. Lenz’s law is […]
12th Board Exam Physics Chapter 4 Moving Charges & Magnetism Objective Question Moving Charges And Magnetism 1. Accelerated charge produces : (A) Alpha Rays (B) Gamma Rays (C) Beta Rays (D) Electromagnetic Wave Answer:- D 2. A charged particle enters into a magnetic field at 30° with induction vector. Its path becomes (A) circular (B) […]
Class 12th Physics Chapter 3 Current Electricity Imoprtant Objective Question Current Electricity 1. Which one of the following is the best material for making connecting wires? (A) Nichrome (B) Tungsten (C) Copper (D) Manganese Answer:- C 2. Fuse-wire is made of which material ? (A) Copper (B) Tungsten (C) Lead-Tin Alloy (P) Nichrome Answer:- A 3. […]