मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

The Electric Field and the Electric Potential at a Point Are E and V, Respectively. - Physics

Advertisements
Advertisements

प्रश्न

The electric field and the electric potential at a point are E and V, respectively.  

पर्याय

  •  If E = 0, V must be zero. 

  •  If V = 0, E must be zero. 

  • If E ≠ 0, V cannot be zero. 

  • If V ≠0, E cannot be zero. 

  • None of the above.

MCQ
Advertisements

उत्तर

None of the above.

Electric field, \[E = \frac{- dV}{dr}\] where V = electric potential
For E = 0,  V should be constant. 
So, when E = 0,  it is not necessary that V should be 0.
Hence, none of the above signifies the correct relation.

 

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 7: Electric Field and Potential - MCQ [पृष्ठ १२०]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
पाठ 7 Electric Field and Potential
MCQ | Q 3 | पृष्ठ १२०

संबंधित प्रश्‍न

Consider a system of n charges q1, q2, ... qn with position vectors `vecr_1,vecr_2,vecr_3,...... vecr_n`relative to some origin 'O'. Deduce the expression for the net electric field`vec E` at a point P with position vector `vecr_p,`due to this system of charges.


Can a gravitational field be added vectorially to an electric field to get a total field?


In some old texts it is mentioned that 4π lines of force originate from each unit positive charge. Comment on the statement in view of the fact that 4π is not an integer. 


When the separation between two charges is increased, the electric potential energy of the charges


The electric field at the origin is along the positive x-axis. A small circle is drawn with the centre at the origin, cutting the axes at points A, B, C and D with coordinates (a, 0), (0, a), (−a, 0), (0, −a), respectively. Out of the points on the periphery of the circle, the potential is minimum at  


If a body is charged by rubbing it, its weight


The electric field in a region is directed outward and is proportional to the distance rfrom the origin. Taking the electric potential at the origin to be zero, 


A block of mass m with a charge q is placed on a smooth horizontal table and is connected to a wall through an unstressed spring of spring constant k, as shown in the figure. A horizontal electric field E, parallel to the spring, is switched on. Find the amplitude of the resulting SHM of the block. 


An electric field  \[\vec{E}  =  \vec{i}\]  Ax exists in space, where A = 10 V m−2. Take the potential at (10 m, 20 m) to be zero. Find the potential at the origin.


The electric potential existing in space is \[\hspace{0.167em} V(x,   y,   z) = A(xy + yz + zx) .\] (a) Write the dimensional formula of A. (b) Find the expression for the electric field. (c) If A is 10 SI units, find the magnitude of the electric field at (1 m, 1 m, 1 m).


Which of the following methods can be used to charge a metal sphere positively without touching it? Select the most appropriate.


A charged particle is free to move in an electric field. It will travel ______.

For distance far away from centre of dipole the change in magnitude of electric field with change in distance from the centre of dipole is ______.

Two identical blocks are kept on a frictionless horizontal table connected by a spring of stiffness k and of original length l0. A total charge Q is distributed on the block such that maximum elongation of spring at equilibrium is equal to x. Value of Q is ______.


In general, metallic ropes are suspended on the carriers taking inflammable materials. The reason is ______.


When 1014 electrons are removed from a neutral metal sphere, the charge on the sphere becomes ______.


Two similar spheres having +Q and -Q charges are kept at a certain distance. F force acts between the two. If at the middle of two spheres, another similar sphere having +Q charge is kept, then it experiences a force in magnitude and direction as ______.


Five charges, q each are placed at the corners of a regular pentagon of side ‘a’ (Figure).

(a) (i) What will be the electric field at O, the centre of the pentagon?

(ii) What will be the electric field at O if the charge from one of the corners (say A) is removed?

(iii) What will be the electric field at O if the charge q at A is replaced by –q?

(b) How would your answer to (a) be affected if pentagon is replaced by n-sided regular polygon with charge q at each of its corners?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×