Home
Class 10
PHYSICS
A cell is sending current in an external...

A cell is sending current in an external circuit. How does the terminal voltage compare with the e.m.f. of the cell ?

Text Solution

Verified by Experts

(1) terminal voltage `lt e.m.f. `
(2) e.m.f. is equal to terminal voltage when no current is drawn by the circuit.
Promotional Banner

Topper's Solved these Questions

  • SAMPLE QUESTION PAPER 4

    ICSE|Exercise SECTION B|38 Videos

  • SAMPLE QUESTION PAPER 2

    ICSE|Exercise SECTION-B|32 Videos

  • SAMPLE QUESTION PAPER 5

    ICSE|Exercise SECTION B|45 Videos

Similar Questions

Explore conceptually related problems

The diagram in Fig. shows a cell of e.m.f. epsi = 2 volt and internal resistance r = 1 ohm connected to an external resistance R = 4 ohm. The ammeter A measures the current in the circuit and the voltmeter V measures the terminal voltage across the cell. What will be the readings of the ammeter and voltmeter when the key K is closed.

The diagram in Fig. shows a cell of e.m.f. epsi = 2 volt and internal resistance r = 1 ohm connected to an external resistance R = 4 ohm. The ammeter A measures the current in the circuit and the voltmeter V measures the terminal voltage across the cell. What will be the readings of the ammeter and voltmeter when the key K is open

36 cells each of internal resistance 0.5 Omega and emf 1.5 V each are used to send current through an external circuit of 2 Omega resistance. Find the best mode of grouping them and the current through the external circuit.

What is the relationship between potential difference across the terminals of a cell and emf of the cell ?

A battery is made by joining m rows of identical cells in parallel. Each row consists of n cells joined in series. This battery sends a maximum current I in a given external resistor. Now the cells are so areaged that instead of m rows. N rows are joind in parallel and each row consists of m cells joined in series. Find the current through the same external resistor (Total number of cells which is equal to nm is connected )

When a resistance of 2 ohm is connected across terminals of a cell, the current is 0.5 A . When the resistance is increased to 5 ohm, the current is 0.25 A The e.m.f. of the cell is

Two identical cells of emf 1.5 V each joined in paralllel provide supply to an external circuit consisting of two resistances of 7 Omega each joined in parallel. A very high resistance voltmeter reads the terminal voltage of cells to be 1.4 V. Calculate the internal resistance of each cell.

In the circuit shown , the current draw by the cell is

In a mixed grouping of identical cells, five rows are connected in parallel and each row contains 10 cells. This combination sends a current I through an external resistance of 20Omega. if the emf and internal resistance of each cell is 1.5 V and 1 Omega, respectively then find the value of I.

Explain the meaning of the terms e.m.f., terminal voltage, and internal resistance of a cell.

ICSE-SAMPLE QUESTION PAPER 4 -SECTION B
  1. (a) What is a calorimeter ? (b) Name the material of which it is m...

    Text Solution

    |

  2. (a) What is a calorimeter ? (b) Name the material of which it is m...

    Text Solution

    |

  3. A cell is sending current in an external circuit. How does the termina...

    Text Solution

    |

  4. Name the material used for filament of an electric bulb,

    Text Solution

    |

  5. A ray of light travels from water to air as shown in the diagram given...

    Text Solution

    |

  6. A ray of light travels from water to air as shown in the diagram given...

    Text Solution

    |

  7. It is observed that: alpha particles and beta particles are defle...

    Text Solution

    |

  8. It is observed that: gamma rays are not deflected by either an el...

    Text Solution

    |

  9. How is the transference of heat energy by radiation prevented in a cal...

    Text Solution

    |

  10. You have a choice of three metals A, B and C, of specific heat capacit...

    Text Solution

    |

  11. A fuse is rated 8 A. Can it be used with an electrical appliance rated...

    Text Solution

    |

  12. Name two safety devices which are connected to the live wire of a hous...

    Text Solution

    |

  13. The diagram below shows a point source P inside a water container. Fou...

    Text Solution

    |

  14. The diagram below shows a point source P inside a water container. Fou...

    Text Solution

    |

  15. Among alpha, beta and gamma-rays, which is the most penetrating?

    Text Solution

    |

  16. Arrange alpha , beta and gamma rays in ascending order with respect t...

    Text Solution

    |

  17. Arrange the alpha, beta and gamma radiation in ascending order of thei...

    Text Solution

    |

  18. State two factors on which the speed of a wave travelling in a medium ...

    Text Solution

    |

  19. Give one application of echo.

    Text Solution

    |

  20. A nucleus of stable phosphorus has 15 protons and 16 neutrons. (a) W...

    Text Solution

    |