Download the chapter on Electric Charges And Fields from the CBSE Class 12 Physics Assertion Reason Questions. Class 12 Physics Assertion Reason Questions with Answers were created using the most recent exam format. To gauge their degree of preparedness, students can complete the NCERT Class 12 Physics Electric Charges And Fields.
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Electric Charges And Fields Class 12 Assertion Reason Questions
The following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false and R is also false
Assertion (A): Like charges repel each other, and unlike charges attract each other.
Reason (R): The force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): The electric field at a point is a vector quantity.
Reason (R): The electric field is defined as the force experienced by a positive test charge placed at that point and is a vector quantity with both magnitude and direction.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): The electric field inside a charged conductor is zero in electrostatic equilibrium.
Reason (R): In electrostatic equilibrium, the charges inside the conductor rearrange themselves such that the electric field inside becomes zero.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): The electric field lines around a positive point charge radiate outward in all directions.
Reason (R): Electric field lines represent the direction of the electric field at each point, and they emerge from positive charges and terminate on negative charges.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): Electric field lines never intersect.
Reason (R): If electric field lines intersect at a point, it would imply that the electric field has two different directions at that point, which is not possible.
Answer: (c) A is true but R is false.
Assertion (A): The electric field inside a uniformly charged spherical shell is zero.
Reason (R): The electric field inside a conductor at electrostatic equilibrium is zero, and a uniformly charged spherical shell can be considered as a conductor.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): Gauss’s law is applicable only to closed surfaces.
Reason (R): Gauss’s law states that the electric flux through a closed surface is directly proportional to the charge enclosed by the surface.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): Electric field lines are closer together in regions of stronger electric fields.
Reason (R): The density of electric field lines is proportional to the magnitude of the electric field, so lines are closer together in stronger field regions.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): The electric field due to a uniformly charged infinite plane sheet is independent of the distance from the sheet.
Reason (R): For an infinite plane sheet, the electric field lines are perpendicular to the sheet’s surface and do not depend on the distance from the sheet.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): Electric field lines never form closed loops.
Reason (R): If electric field lines formed closed loops, it would imply that the electric field has no unique direction at some points, which is not possible.
Answer: (a) Both A and R are true and R is the correct explanation of A.
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