Bissoy.com
Doctors Medicines MCQs Q&A

There is a uniform electric field of intensity E which is as shown. How many labelled points have the same electric potential as the fully shaded point?

There is a uniform electric field of intensity E which is as shown. How many labelled points have the same electric potential as the fully shaded point? Correct Answer 3

CONCEPT:

  • Electric lines of forces constitute the electric field and vice versa.
  • Electric lines of force:  Inside the electric field, The path along which a unit positive charge will move if it is free to do so is called electric lines of force.
    • The tangent at any point to these lines gives the direction of the electric field at that point.
  • Electric lines of force always flow from higher potential to lower potential.
  • If we move perpendicular to these lines, the electric potential doesn't change.

EXPLANATION:

  • Electric lines of force always flow from higher potential to lower potential.
  • So in the given figure in the question, 
  • If we move from labelled point to the right side, the potential will decrease.
  • If we move from label to the left side, the potential will increase.
  • If we move perpendicular to these lines, the electric potential doesn't change.

​[ alt="F1 J.K Madhu 07.07.20 D7" src="//storage.googleapis.com/tb-img/production/20/07/F1_J.K_Madhu_07.07.20_D7.png" style="width: 144px; height: 110px;">

  • So there are 3 more points other than the labelled point which will be at the same potential. (Perpendicular to the electric field).
  • So the correct answer is option 4.

Related Questions

How far is point 'R' from Point 'T'? Statement (I): Point 'R' is 5 metres to the north of point 'M'. Point 'U' is 4 metres to the east of point 'R'. Point 'T' is to the west of point 'R' such that points 'U' 'R' and 'T' form a straight line of  metres. Statement (II): Point 'Z' is metres to the south of point 'T'. Point 'U' is  metres to the east of point 'T'. Point 'M' is  metres to the east of point 'Z'. Point 'R' is  metres to the north of point 'M'. Point 'R' lies on the line formed by joining points 'T' and 'U'.
Point A is 3m in the north of point B. Point D is 2m in the east of point E. Point F is 9m in the west of point G. Point C is 4m in the west of point B. Point C is 3m in the south of point D. Point F is 5m in the south of point E. Point H is 5m in the north of point G. What is the shortest distance between point H and point A?
Point P is 4m in the west of point V. Point R is 6m in the north of point Q. Point T is 5m in the south of point S. Point V is in the middle of point R and Q. Point U is 5m in the east of point R. Point V is in north of point Q. Point S is 5m in the east of point V. What is the area of triangle formed by point P, R and Q?
Study the following information and answer the questions. Point A is 8m to the west of Point B. Point C is 4m to the south of Point B. Point D is 4m to the east of Point C. Point F is 6m to the north of Point D. Point E is 8m to the west of Point F. Point G is 2m to the south of Point E. How far and in which direction is Point G from Point A?
Study the following information and answer the questions. Point A is 8m to the west of Point B. Point C is 4m to the south of Point B. Point D is 4m to the east of Point C. Point F is 6m to the north of Point D. Point E is 8m to the west of Point F. Point G is 2m to the south of Point E. If point G is 4m to the north of Point H, then what is the distance between H and D?
Garima starts walking towards the south from point R. He walks for 5m to reach Point S then turns right and walks for 2m to reach point T from there he turns left and walks for 3m to reach Point Z. He then turns right from point Z and walks for 6m to reach point Y and then turns right and walks for 3m to reach point X. He then turns right from point X and walks for 4m to reach point W and then turns left and walks for 5m to reach point V and then turns left and walks for 4m till point U and stops. What is the shortest distance between point V and point R?
Equal sized circular regions are shaded in a square sheet of paper of 1 cm side length. Two cases, case M and case N, are considered as shown in the figures below. In the case M, four circles are shaded in the square sheet and in the case N, nine circles are shaded in the square sheet as shown. What is the ratio of the areas of unshaded regions of case M to that of case N?
Point A is 5m in the north of point B. Point D is 5m in the south of point C. Point E is 16m in the north of point F. Point D is 6m in the west of point G, which is the midpoint of line formed by E and F. Point D is 3m in the east of point B. What is the shortest distance between point D and point F?
Point P is 5 m towards the South of Point M. Point Q is 3 m towards the East of Point P. Point O is 3 m towards the East of Point M. Point N is 2 m towards the South of Point Q. A person, facing North, takes a left turn from point M, walks 4 m and stops. He then takes another left turn, walks 5 m and stops at point R. Which of the following points, including R, fall in a straight line?
Two circular dials of exactly the same size are mounted on a wall side by side in such a way that their perimeters touch at one point. Dial 1, which is on the left , spins clockwise around its center , and dial 2 , which is on the right spins counter clockwise around its center . (Assume that there is no friction at the point of contact between the dials.) Each dial is marked on its perimeter at three points that are at equale distances around the points arked ondial 1 are N, O, and P and the points marked on dial 2 are X, Y, and Z. If points O and Z are just meeting at the point of contact between the dials , and if dial 1 spins at the same speed as dial 2, what is the smallest number of revolutions of each dial that will bring O and Z together again?