Category: Class 12 Physics

NCERT Exemplar Problems Class 12 Physics Chapter 14 Semiconductor Electronics: Materials, Devices and Simple Circuits Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. The conductivity of a semiconductor increases with increase in temperature, because (a) number density of free current carries increases (b) relaxation time increases (c) both number density of carries and…
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NCERT Exemplar Problems Class 12 Physics Chapter 1 Electric Charges and Fields Chapter 2 Electrostatic Potential and Capacitance Chapter 3 Current Electricity Chapter 4 Moving Charges and Magnetism Chapter 5 Magnetism and Matter Chapter 6 Electromagnetic Induction Chapter 7 Alternating Current Chapter 8 Electromagnetic Waves Chapter 9 Ray Optics and Optical Instruments Chapter 10 Wave…
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NCERT Exemplar Problems Class 12 Physics Chapter 15 Communication Systems Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. Three waves A, B and C of frequencies 1600 kHz, 5 MHz and 60 MHz respectively are to be transmitted from one place to another. Which of the following is the most appropriate mode of…
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NCERT Exemplar Problems Class 12 Physics Chapter 13 Nuclei Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. Suppose we consider a large number of containers each containing initially 10000 atoms of a radioactive material with a half life of 1 year. After 1 year, (a) all the containers will have 5000 atoms of…
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NCERT Exemplar Problems Class 12 Physics Chapter 12 Atoms Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. Taking the Bohr radius as a0= 53 pm, the radius of Li++ ion in its ground state, on the basis of Bohr’s model, will be about (a) 53 pm (b) 27 pm (c) 18 pm (d)…
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NCERT Exemplar Problems Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. A particle is dropped from a height H. The de-Broglie wavelength of the particle as a function of height is proportional to (a) H (b) H1/2 (c) H0 (d) H-1/2 Solution:…
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NCERT Exemplar Problems Class 12 Physics Chapter 10 Wave Optics Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. Consider a light beam incident from air to a glass slab at Brewster’s angle as shown in figure. A Polaroid is placed in the path of the emergent ray at point P and rotated about…
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NCERT Exemplar Problems Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. A ray of light incident at an angle d on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5° and the…
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NCERT Exemplar Problems Class 12 Physics Chapter 8 Electromagnetic Waves Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. One requires 11 eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in (a) visible region (b)…
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NCERT Exemplar Problems Class 12 Physics Chapter 7 Alternating Current Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. If the rms current in a 50 Hz AC circuit is 5 A, the value of the current 1/300 s after its value becomes zero is Solution: (b) Key concept: Equation for i and V:…
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