Lec - 7 | Mega Quiz | Important M.C.Q. | 12th Physics | By Gopal Sir | Doubtnut

Class 12th Physics | Easy & Hard Most Important Chapters

BSE Class 12 Chemistry - Most Important MCQs | Physical Chemistry MCQs - Live Discussion

Class 12 Physics | Chapter 7 Alternating Current | Important Questions and Quick Revision Part-1

Class 12 Physics | Chapter 7 Alternating Current | Important Questions and Quick Revision Part-1

Class 12 Physics | Chapter 7 Alternating Current | Important Questions and Quick Revision Part-2

In a A B C , D a n d E are points on the sides A B and A C respectively. For each of the following cases show that D E B C : A B=12 c m , A D=8 c m , A E=12 c m a n d A C=18 c m . (ii) A B=5. 6 c m , A D=1. 4 c m , A C=7. 2 c m a n d A E=1. 8 cm

A radioactive nucleus A at rest disintegrates into two nuclei B and C . Mass of B is 12m and that of C is 4m .The Q -value of the reaction is Q=(h^(2))/(24m lambda^(2)) .The energy liberated in reaction is completely imparted to the products (B and C) as kinetic energy.

A rectangle and a parallelogram have equal areas. If the sides of the rectangle are 10 m and 12 m and the base of the parallelogram is 20 m, then the altitude of the parallelogram is (a) 3 m (b) 5 m (c) 6 m (d) 7 m