Home
Class 12
PHYSICS
Two sources of equal emf are connected t...

Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are` R_(1) and R_(2) (R_(1) gt R_(1))`. If the potential difference across the source having internal resistance `R_(2)` is zero, then

A

`R=(R_(1)R_(2))/(R_(1)+R_(2))`

B

`R=((R_(1)R_(2))/(R_(2)-R_(1)))`

C

`R=R_(2)((R_(1)+R_(2))/((R_(2)-R_(1))))`

D

`R=R_(2)-R_(1)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NTA NEET SET 24

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

  • NTA NEET SET 27

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R_1 and R_2(R_1gtR_1). if the potential difference across the source having internal resistance R_2 is zero, then

Two cells, having the same emf, are connected in series through an external resistance R . Cells have internal resistance r_(1) and r_(2) (r_(1) gt r_(2)) respectively. When the circuit is closed, the potentail difference across the first cell is zero the value of R is

Internal resistance of battery of emf 2E is R_1 and battery of emf E is R_2 . If the potential difference across the cell of emf 2E is zero, then value of R is

Two cells of same emf epsilon , but different internal resistances r_(1) " and " r_(2) are connected to an external resistance R, as shown. The voltmeter V reads zero. Find R in terms of r_(1) " and " r_(2) , and the voltage across the cell of internal resistance r_(2) .

Two sources of current of equal emf are connected in series and having different internal resistance r_1 and r_2(r_2gtr_1) . Find the external resistance R at which the potential difference across the terminals of one of the sources becomes equal to zero.

If E is the emf of a cell of internal resistance r and external resistance R, then potential difference across R is given as

NTA MOCK TESTS-NTA NEET SET 26-PHYSICS
  1. If a current is passed through a spring then the spring will

    Text Solution

    |

  2. If the mass defect of .(5)B^(11) is 0.081 u, its average binding energ...

    Text Solution

    |

  3. The time taken by a photoelectron to come out after the photon strikes...

    Text Solution

    |

  4. On applying a constant torque, a wheel at rest, turns through 400 radi...

    Text Solution

    |

  5. Two stars radiate maximum energy at wavelengths 3.6xx10^(-5)cm and 4.8...

    Text Solution

    |

  6. When p-n junction diode is forward biased then

    Text Solution

    |

  7. The angle of incidence at which reflected light is totally polarized f...

    Text Solution

    |

  8. Two sources of equal emf are connected to an external resistance R. Th...

    Text Solution

    |

  9. A body is moved along a straight line by a machine delivering constant...

    Text Solution

    |

  10. A ray of light is incident normally on one of the faces of a prism of ...

    Text Solution

    |

  11. A monoatomic ideal gas, initially at temperature T1, is enclosed in a ...

    Text Solution

    |

  12. A particle of mass 0.5kg travels in a straight line with velocity v=ax...

    Text Solution

    |

  13. Identify the pair whose dimensions are equal

    Text Solution

    |

  14. The maximum velocity a particle, executing simple harmonic motion with...

    Text Solution

    |

  15. One mole of ideal monoatomic gas (gamma=5//3) is mixed with one mole o...

    Text Solution

    |

  16. A vessel contains 1 mole of O(2) gas (molar mass 32) at a temperature ...

    Text Solution

    |

  17. A solid cylinder of mass 10 kg and radius 15 cm is rolling perfectly o...

    Text Solution

    |

  18. A light ray is incident perpendicularly to one face of a 90^circ prism...

    Text Solution

    |

  19. A marble block of mass 2 kg lying on ice when given a velocity of 6m//...

    Text Solution

    |

  20. If M is the mass of the earth and R its radius, then ratio of the grav...

    Text Solution

    |