Capacitors
Trending Questions
Q. For a charged parallel plate capacitor shown in the figure, the force experienced by an alpha particle


- maximum at C
- zero at A
- same at B and C
- zero at C
Q. Capacitors are used in electrical circuits where appliances need rapid:-
- Current
- Voltage
- Watt
- Resistance
Q. A capacitor C1=1.0μF is charged up to a voltage V=60V by connecting it to a battery B through the switch (1). Now C1 is disconnected from battery and connected to a circuit consisting of two uncharged capacitors C2=3.0μF and C3=6.0μF through a switch (2) as shown in the figure. The sum of final charges on C2 and C3 is:

- 40μC
- 36μC
- 54μC
- 20μC
Q. A parallel-plate air capacitor of capacitance 245pF has a charge of magnitude 0.148μC on each plate. The plates are 0.328mm apart. What is the area of each plate?
Q. In the circuit shown in figure C=6 μF. The charge stored in capacitor of capacity C is?


- Zero
- 90 μ C
- 40 μ C
- 60 μ C
Q. The charge on the capacitor in steady state is :-


- 2 μC
- 4 μC
- 6 μC
- 8 μC
Q. Write the application of capacitors.
Q. Three conducting bodies A(solid sphere), B(hollow sphere) and C(hollow sphere with thickness R) are arranged as shown in the figure. A charge q is given to the inner sphere. Match the statements from List I with the values in List II and select the correct answer using the code given below the lists.

Column-I | Column-II | ||
(A) | When S1, S2 both are open, capacity of the system is C1, then C1 is | (p) | 16πϵ0R |
(B) | When S1 is closed but S2 is open, capacity is C2, then C2 is | (q) | 16πϵ0R3 |
(C) | When S2 is closed but S1 is opened, capacity is C3, then C3 is | (r) | 48πϵ0R5 |
(D) | When both S1 and S2 are closed, capacity is C4, then C4 is | (s) | 48πϵ0R11 |

Q. The unit to measure capacitance of a capacitor is coulomb.
- True
- False
Q. A capacitor having capacitance 1 μF with air, is filled with two dielectrics as shown. How many times capacitance will increase?


- 12
- 6
- 83
- 3