Home
Class 12
PHYSICS
Two identical capacitors A and B are cha...

Two identical capacitors A and B are charged to the same potential and then made to discharge through resistances `R_(A)` and `R_(B)` respectively, with `R_(A) gt R_(B)`.

A

A will require greater time than B to discharge

B

More heat will be produced in A than in B.

C

More heat will be produced in B than in A.

D

A will require less time than B to discharge completely

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, let's analyze the situation step by step. ### Step 1: Understand the scenario We have two identical capacitors, A and B, which are charged to the same potential. They are then discharged through resistances \( R_A \) and \( R_B \) respectively, where \( R_A > R_B \). ### Step 2: Determine the time constant for each capacitor The time constant \( \tau \) for a capacitor discharging through a resistor is given by the formula: \[ \tau = R \cdot C \] where \( R \) is the resistance and \( C \) is the capacitance of the capacitor. Since both capacitors are identical, they have the same capacitance \( C \). For capacitor A: \[ \tau_A = R_A \cdot C \] For capacitor B: \[ \tau_B = R_B \cdot C \] ### Step 3: Compare the time constants Since \( R_A > R_B \), it follows that: \[ \tau_A > \tau_B \] This means that capacitor A will take longer to discharge compared to capacitor B. ### Step 4: Analyze the heat produced The energy stored in a capacitor is given by: \[ E = \frac{1}{2} C V^2 \] Since both capacitors are charged to the same potential \( V \) and have the same capacitance \( C \), the energy stored in both capacitors is the same. When the capacitors discharge, the energy is converted into heat. Therefore, the heat produced in both capacitors will also be the same. ### Step 5: Conclusion Based on the analysis: 1. Capacitor A will require more time to discharge than capacitor B. 2. The heat produced in both capacitors will be the same. ### Final Answers: - A will require greater time than B to discharge (Correct). - More heat will be produced in A than in B (Incorrect). - More heat will be produced in B than in A (Incorrect). - A will require less time than B to discharge completely (Incorrect).
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    AAKASH SERIES|Exercise EXERCISE-IB|18 Videos
  • ELECTROMAGNETIC INDUCTION

    AAKASH SERIES|Exercise EXERCISE-II|32 Videos
  • ELECTROMAGNETIC INDUCTION

    AAKASH SERIES|Exercise Additional Exercise|11 Videos
  • ELECTRIC FIELD AND POTENTIAL

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-II)|26 Videos
  • ELECTROMAGNETIC WAVES

    AAKASH SERIES|Exercise EXERCISE -II|22 Videos

Similar Questions

Explore conceptually related problems

Three identical capacitors A, B and C are charged to the same potential and then made to discharge through three resistances R_A, R_B and R_C , where R_A gt R_B gt R_C . Their potential differences (V) are plotted against time t, giving the curves 1, 2 and 3. Find the correlations between A, B, C and 1, 2, 3.

A capacitor is charged to a certain potential and then allowed to discharge through a resistance R. The ratio of charge on the capacitor to current in the circuit

Three identical capacitors are charged by connecting them in parallel across a battery of V volt. They are then allowed to discharge via resistor R_(1), R_(2) and R_(3) . Here, Q charge versus t time graphs are shown. Then,

A capacitor of capacitance C, charged to a potential difference V, is discharged through a series combination of two resistors R_(1) and R_(2) . Find the heat generated in resistor R_(1) during discharging.

Two electric bulbs , rated for the same voltage , have powers of 200 W and 100 W , respectively. If their resistances are r_(1) and r_(2) , respectively , then

Two resistors A and B have resistances R_(A) and R_(B) respectively with R_(A)ltR_(B) .the resistivities of their materials are (rho_A) and (rho_B) .

A cell develops the same power across two resistances R_(1) and R_(2) separately. The internal resistance of the cell is

A cell develops the same power across two resistances R_(1) and R_(2) separately. The internal resistance of the cell is

Two particles of masses m_a and m_b and same charge are projected in a perpendicular magnetic field . They travel along circular paths of radius r_(a) and r_(b) such that r_(a) gt r_(b) . Then which is true ?

Two particle are projected from an incliend plane as shown. A is projected up the incline and B down the incline. If R_(A) and R_(B) are range of A and B respectively then (R_(B))/(R_(A)) will be equal to :

AAKASH SERIES-ELECTROMAGNETIC INDUCTION-EXERCISE-IA
  1. A metallic ring is connected to a rod oscillates freely like a pendulu...

    Text Solution

    |

  2. Figure shows tow bulbs B(1) and B(2) resistor R and inductor L, when ...

    Text Solution

    |

  3. An inductor L, a resistanc eR and two identical bulbs B(1) and B(2) ar...

    Text Solution

    |

  4. If the number of turns per unit length of a coil of solenoid is double...

    Text Solution

    |

  5. A solenoid is connected to a battery so that a steady current flows th...

    Text Solution

    |

  6. A coil of self-inductance L is connected in series with a bulb B and a...

    Text Solution

    |

  7. The coefficient of mutual inductance of two coils depends on

    Text Solution

    |

  8. Two circular coils can be arranged in any of three situations as shown...

    Text Solution

    |

  9. When the plane of the armature of an ac. generator is parallel to the ...

    Text Solution

    |

  10. A coil of self-inductance L is placed in an external magnetic field (n...

    Text Solution

    |

  11. Switch S of the circuit shown in figure is closed at t = 0. If em...

    Text Solution

    |

  12. The magnetic energy stored in a long solenoid of area of cross-section...

    Text Solution

    |

  13. In an L-R circuit connected to a battery of constant emf E, switch is ...

    Text Solution

    |

  14. Two identical capacitors A and B are charged to the same potential and...

    Text Solution

    |

  15. Consider the situation shown in figure . If the switch is closed and a...

    Text Solution

    |

  16. In the pure inductive circuit, the curves between frequency f and reci...

    Text Solution

    |

  17. The heat developed in a system is proportional to the current through ...

    Text Solution

    |

  18. Match the items of column I with those of Column II and choose the cor...

    Text Solution

    |

  19. Consider the following statements A) If time constant is small the ...

    Text Solution

    |

  20. The switches in (a) and (b) are closed at t = 0 and re opened after a ...

    Text Solution

    |