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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NCERT Exemplar Problems Class 12 Physics Chapter 6 Electromagnetic Induction Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. Solution: (c) Key concept: Magnetic flux is defined as the total number of magnetic lines of force passing normally through an area placed in a magnetic field and is equal to the magnetic flux linked…
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NCERT Exemplar Problems Class 12 Physics Chapter 5 Magnetism and Matter Multiple Choice Questions (MCQs) Single Correct Answer Type Question 1. A toroid of n turns, mean radius R and cross-sectional radius a carries current I. It is placed on a horizontal table taken as xy-plane. Its magnetic moment m (a) is non-zero and points…
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NCERT Exemplar Problems Class 12 Physics Chapter 4 Moving Charges and Magnetism Multiple Choice Questions Single Correct Answer Type Question 1. Two charged particles traverse identical helical paths in a completely oppo-site sense in a uniform magnetic field B = B0k (a) They have equal z-components of momenta (b) They must have equal charges (c)…
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