Home
Class 12
PHYSICS
An energy source will supply a constant ...

An energy source will supply a constant current into the load if its internal resistance is

A

Zero

B

Non-zero but less thatn the resistance of the load

C

Equal to the resistance of the load

D

Very large as compared to the load resistance

Text Solution

Verified by Experts

The correct Answer is:
D

(d) `I = (epsilon)/(r + R)`
`r gt gt R`, when
`I = (epsilon)/(r ) =` constant
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    A2Z|Exercise Assertion- Reason|14 Videos
  • ATOMIC PHYSICS

    A2Z|Exercise Section D - Chapter End Test|30 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

A : High voltage ( high tension ) supply must have very large internal resistance. R: If the circuit is accidentally shorted , then the current drawn will not exceed safely limits if internal resistance is high.

If 8 cells having an emf of 1.5 V are connected in series across a load having resistance of 10 Omega . What is the current drawn by the load ? Assume internal resistance of all be 0.5 Omega .

A cell to emf. E and internal resistance r supplies currents for the same time t through external resistance R_1 and R_2 respectively. If the heat produced in both cases is the same, then the internal resistance is given by :

A dc source with internal resistance R_(0) is loaded with three identical resistance R as shown in the figure. At what value of R will the thermal power generated in this circuit be the highest?

(a) Six lead-acid type of secondary cells each of emf 2-0 V and internal resistance 0-015Omega are jouned in series to provide a supply to a resistance of 8-5Omega . What are the current drawn from the supply and its terminal voltage ? (b) A secondary cells after long use has an emf of 1-9 V and a large internal resistance of 380 Omega . What maximum current can be drawn from the cell ? Could the cell drive the starting motor of a car ?

A2Z-CURRENT ELECTRICITY-Section D - Chapter End Test
  1. The total current supplied to the circuit by the battery is

    Text Solution

    |

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

    Text Solution

    |

  3. An energy source will supply a constant current into the load if its i...

    Text Solution

    |

  4. In a potentiometer experiment the balancing with a cell is at length 2...

    Text Solution

    |

  5. A moving coil galvanometer has 150 equal divisions. Its current sensit...

    Text Solution

    |

  6. The current from the battery in circuit diagram shown is

    Text Solution

    |

  7. A battery of internal resistance 4Omega is connected to the network of...

    Text Solution

    |

  8. A Steady current flows in a metalic conductor of non uniform cross sec...

    Text Solution

    |

  9. In the circuit shown in figure the current through

    Text Solution

    |

  10. A wire of length L and 3 identical cells of negligible internal resist...

    Text Solution

    |

  11. Express which of the following set ups can be used to verify ohm's l...

    Text Solution

    |

  12. Six identical resistors are connected as shown in the figure. The equi...

    Text Solution

    |

  13. A wire when connected to 220 V mains supply has power dissipation P1. ...

    Text Solution

    |

  14. A heater coil is cut into two equal parts and only one part is now use...

    Text Solution

    |

  15. The resistance of hot tungsten filament is about 10 times the cold res...

    Text Solution

    |

  16. A 100 W bulb B1, and two 60 W bulb B2 and B3, are connected to a 250 V...

    Text Solution

    |

  17. Two cells, having the same emf, are connected in series through an ext...

    Text Solution

    |

  18. The current in conductor varies with time t as I = 2 t + 3 t^(2) where...

    Text Solution

    |

  19. A torch bulb rated 4.5 W, 1.5 V is connected as shown in Fig. 7.35. Th...

    Text Solution

    |

  20. If in the circuit shown below, the internal resistance of the battery ...

    Text Solution

    |