IIT JAM
   Top Resources
Vibhuti posted an Question
September 14, 2020 • 04:18 am 30 points
  • IIT JAM
  • Physics (PH)

A electrical potential in an electric field is given by v = kir (k being constant). if the position vector f 21 +3j+6k, then the clectric field will be 4. (2i+3

a Electrical potential in an electric field is given by V = KIr (K being constant). If the position vector F 21 +3j+6k, then the clectric field will be 4. (2i+3+6k (2+3/+6k) (a) 343 243 (6i +2+6k)k (d) (3+2+6)2x (c) 343 243

2 Answer(s) Answer Now
  • 0 Likes
  • 4 Comments
  • 0 Shares
  • comment-profile-img>
    Ravi prakash yadav

    V=k/r (given) using E=-dV/dr =-(-k/r×r)r^ =(k/r×r)r^ now r=2i^+3j^+6k^ mod(r)=√(2×2+3×3+6×6) =√49 =7 r×r=49 r^=r/mod(r) =(2i^+3j^+6k^)/7 putting r×r and r^ in E E=(2i^+3j^+6k^)k/343 hence B is the answer.

whatsapp-btn

Do You Want Better RANK in Your Exam?

Start Your Preparations with Eduncle’s FREE Study Material

  • Updated Syllabus, Paper Pattern & Full Exam Details
  • Sample Theory of Most Important Topic
  • Model Test Paper with Detailed Solutions
  • Last 5 Years Question Papers & Answers

Sign Up to Download FREE Study Material Worth Rs. 500/-