JIPMER2019PhysicsElectromagnetic Waves
Potential difference is given as V(x)=-x^2 y volt. Find electric field at a point (1,2) ?
Options
- Ai +4 j V / m
- B-4 i - j V / m
- C4 i + j V / m
- D4 i - j V / m
Correct answer
C. 4 i + j V / m
Step-by-step solution
Potential difference aligned V(x) & =-x^2 y V E & =- V=- [ i x (-x^2 y )+ j y (-x^2 y ) ] aligned aligned & =- [-2 x y i -x^2 j ]=2 x y i +x^2 j E at (1,2) & =2 1 2 i +1^2 j & =4 i + j V / m aligned