Home
Class 12
PHYSICS
The internal resistance of a primary cel...

The internal resistance of a primary cell is `4 Omega` . It generates a current of 0.2 A in a external circuit of `21Omega` . The rate at which electric energy is consumed in providing the current is

A

1 J/s

B

2 J/s

C

1.5 J/s

D

2.5 J/s

Text Solution

Verified by Experts

The correct Answer is:
A
`P=(W)/(t)=I^(2)(R+r)=1J//s`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NIKITA PUBLICATION|Exercise Multiple Choice Questions|314 Videos

  • COMMUNICATION SYSTEMS

    NIKITA PUBLICATION|Exercise Multiple Choice Questions (Examples for Practice)|8 Videos

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos

Similar Questions

Explore conceptually related problems

The internal resistance of primary cell is 4Omega it generater a current of 0.2A in which chemical resistance connected is providing the current is

The internal resistance of a 2.1 V cell which gives a current 0.2 A through a resistance of 10 Omega

An electric current of 4.0A flows through a 12Omega resistor. What is the rate at which heat energy is produced in the resistor?

A cell of emf epsilon and internal resistance r gives a current of 0.5 A with an external resistance of 12 Omega and a current of 0.25 A with an external resistance of 25 Omega . Calculate (a) internal resistance of the cell and (b) emf of the cell.

Current 2 A is flowing through a conductor of resistance 4 Omega . Find the electrical energy consumed is 10 s.

45 cells each of internal resistance 0.4Omega and emf 2.0 V are used to send current through an external circuit of resistance 2.0 Omega . What will the best mode of grouping them for maximum current? Find the currnet in the external circuit.

NIKITA PUBLICATION-CURRENT ELECTRICITY-Multiple Choice Questions
  1. The length and readius of a wire is l and r respectively. Its resist...

    Text Solution

    |

  2. A copper wire of length 1 m and radius is joined in series with an iro...

    Text Solution

    |

  3. The internal resistance of a primary cell is 4 Omega . It generates a...

    Text Solution

    |

  4. A capacitor of 10 mu F has a potential difference of 40 V across it....

    Text Solution

    |

  5. The resistance of a conductor is 5Omega at 50^(@)C and 6Omega at 100^...

    Text Solution

    |

  6. In an electrical cable there is a single wire of radius 9 mm of copper...

    Text Solution

    |

  7. A copper wire of length l and radius r is nickel plated till its final...

    Text Solution

    |

  8. In the figure given below find the resistance between points A and B. ...

    Text Solution

    |

  9. The resistance of a wire of iron is 10 ohm and temperature coefficient...

    Text Solution

    |

  10. Drift velocity of electrons in a conductor bearing potential differen...

    Text Solution

    |

  11. 100 cells each of emf 5V and internal resistance 1 Omega are to be arr...

    Text Solution

    |

  12. The equivalent resistance of the hexagonal network as shown figure be...

    Text Solution

    |

  13. Twelve wires, each of resistance 1Omega are connected to form a skelet...

    Text Solution

    |

  14. In the network shown the potential difference between A and B is (R = ...

    Text Solution

    |

  15. Twelve equal wires each of resistance r Omega form a cube. The effect...

    Text Solution

    |

  16. The equivalent resistance between the terminals A and B in the network...

    Text Solution

    |

  17. 12 resistors each of 10Omega are connected as shown in the figure. The...

    Text Solution

    |

  18. In the network shown in figure each resistance is 1 Omega. The effecti...

    Text Solution

    |

  19. the length of wire of diameter 0.5 mm needed to produce a coil of resi...

    Text Solution

    |

  20. The resistance of a wire of length 40 m and radius o.25 mm is 10 Omega...

    Text Solution

    |