MCQ : Capacitor ( 1 to 10)

1. The equivalent capacitance between A and B is
(A) C
(B) 2C
(C) 1.5 C
(D) none of the above

2. In the circuit shown in the figure, the capacitor C is charged to a potential Vo. The heat generated in the circuit when the switch S is closed, is
(A) C
(B) 2C
(C) 4C
(D) 8C

3. The plates of a parallel plate charged capacitor are not parallel, the interface charge density is
(A) is higher at the closer end
(B) is non-uniform
(C) is higher at inclined plate.
(D) none of the above

4. There are ‘n’ identical capacitors, which are connected in parallel to a potential difference V. These capacitors are then reconnected, in series. The potential difference between the extreme ends is :
(A) zero
(B) nV
(C) (n – 1) V
(D) none of the above

5. The force with which the plates of a pa0rallel plate capacitor having a charge Q and area of each plate A, attract each other is
(A) directly proportional to Q2 and inversely to A.
(B) inversely proportional to Q2 and directly to A.
(C) does not depend upon Q2 and is inversely proportional to A.
(D) none of the above

6. The equivalent capacitance between points A and B for the given figure is
(A) 1 μF
(B) 2 μF
(C) 3 μF
(D) 4 μF

7. The equivalent capacitance between A and B is
(A) 6 C
(B) 4C
(C) 2C
(D) none of the above

8. A dielectric slab of thickness 4 mm is placed between the plates of a parallel plate capacitor. If the distance between plates is reduced by 3.5 mm, the capacity of the capacitor remains same. Find the dielectric constant of the medium.
(A) 2 (B) 4
(C) 6 (D) 8

9. The effective capacitance between A and B will be
(A) 0.5 μF
(B) 1.5 μF
(C) 2 μF
(D) 2.5 μF

10. If the capacitance between two successive plates is C, then the capacitance of the equivalent system between A and B is

(A) C/3
(B) 3C
(C) 2C/3
(D) 3C/2

1. A   2. D
3. A   4. B
5. A   6. A
7. C   8. D
9. C   10. B