Navbodh Physics Class 12. We covered all the Navbodh Physics Class 12 in this post for free so that you can practice well for the exam.
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A cube of metal is given a positive charge Q. For this system, which of the following statements is true?
(A) The electric field is normal to the surface of the cube
(B) The electric field varies within the cube
(C) Electric potential within the cube is zero
(D) Electric potential at the surface of the cube is zero
Option a – The electric field is normal to the surface of the cube
If a +vely charged body is connected to the earth, its potential becomes :
(A) zero
(B) positive
(C) infinity
(D) negative
Option a – zero
A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 50V. The potential at the center of the sphere is :
(A) 50 V
(B) zero
(C) same as at a point 5 cm away from the surface
(D) same as at a point 10 cm away from the surface
Option a – 50 V
The potential gradient is a :
(A) vector quantity
(B) scalar quantity
(C) conversion factor
(D) constant
Option a – vector quantity
An equipotential surface is that surface on which each and every point has :
(A) zero potential
(B) same potential
(C) negative potential
(D) different potential
Option b – same potential
Two copper spheres of the same radii one hollow and the other solid are charged to the same potential which will hold more charge?
(A) Solid sphere
(B) Hollow sphere
(C) Both will hold an equal charge
(D) Nothing can be predicted
Option c – Both will hold an equal charge
Two spheres of different radii are connected with the help of a metallic wire. A charge is given to the bigger sphere then :
(A) the larger sphere will have less potential
(B) the larger sphere will have more potential
(C) both will have the same potential
(D) the smaller sphere will have zero potential
Option c – both will have the same potential
The work done in an electric field in taking unit positive charge once around a charge +q (stationary) along a circle of radius r is :
(A) positive
(B) zero
(C) negative
(D) infinite
Option b – zero
We covered all the navbodh physics class 12 above in this post for free so that you can practice well for the exam.
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