Physics Class 12

Physics class 12 chapter 11 Objective Questions

Dual Nature of Radiation and Matter Objective Who established that electric charge is quantised? (a) J.J. Thomson (b) William Crookes (c) R.A. Millikan (d) Wilhelm Rontgen Answer: (c) R.A. Millikan Cathode rays were discovered by (a) Maxwell Clerk James (b) Heinrich Hertz (c) William Crookes (d) J.J. Thomson Answer: (c) William Crookes The minimum energy […]