(Download) Bihar Board Exam CLASS-12 Model Question Papers
Exam Name : Bihar Board Exam CLASS-12 Model Question Papers
Subject : Physics & Physics Objective
Year : 2017
Model Set (Class-XII) 2017
SECTION-II (NON-OBJECTIVE TYPE QUESTIONS)
Question Nos. 1 to 11 are of short answer type. Each question carries 2 marks. 11 × 2 = 22
1. What do you mean by surface charge density and write its SI unit ?
Ans.—Surface charge density—It is defined as charge per unit area. It is denoted by .
It can be expressed as,
Courtesy: Bihar Board