Download the chapter on Electrostatic Potential And Capacitance 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 Chapter 2 Electrostatic Potential And Capacitance.
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Electrostatic Potential And Capacitance 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): The electrostatic potential at a point is a scalar quantity.
Reason (R): The electrostatic potential is defined as the work done in bringing a positive test charge from infinity to the point without any acceleration, and work is a scalar quantity.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): Equipotential surfaces are always perpendicular to the electric field lines.
Reason (R): On an equipotential surface, the electric potential is the same at every point, and the electric field is always perpendicular to the surface.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): The potential energy of a charge placed in an electric field is directly proportional to its charge and the electric potential at that point.
Reason (R): The potential energy of a charge is given by the equation PE = qV, where q is the charge and V is the electric potential.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): The electric potential inside a charged conductor is constant and zero at its surface in electrostatic equilibrium.
Reason (R): In electrostatic equilibrium, the electric field inside a charged conductor is zero, leading to a constant electric potential throughout the conductor and zero potential at its surface.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): The capacitance of a parallel plate capacitor depends on the area of the plates and the separation between them.
Reason (R): The capacitance is directly proportional to the area of the plates and inversely proportional to the separation between them.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): A dielectric material placed between the plates of a capacitor increases its capacitance.
Reason (R): A dielectric material reduces the electric field between the plates, resulting in an increase in the capacitance.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): Capacitors in series have the same charge on each of them.
Reason (R): In series, the same charge flows through all the capacitors since they are connected in a closed loop.
Answer: (d) A is false but R is true.
Assertion (A): When a dielectric material is inserted between the plates of a capacitor, the energy stored in the capacitor increases.
Reason (R): The presence of a dielectric increases the capacitance, and since energy stored is proportional to the capacitance, the energy stored in the capacitor increases.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): The electric potential inside a charged hollow metallic sphere is zero.
Reason (R): In a hollow charged metallic sphere, the electric field inside is zero, and therefore the electric potential is also zero.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Assertion (A): The capacitance of a capacitor is independent of the charge stored on its plates.
Reason (R): The capacitance is determined by the physical characteristics of the capacitor, such as the area of the plates and the distance between them, and is not affected by the amount of charge stored.
Answer: (c) A is true but R is false.
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