Home
Class 11
PHYSICS
A resistor of resistance R is connected ...

A resistor of resistance R is connected to a cell internal resistance `5 Omega`. The value of R is varied from ` 1 Omega` to `5 Omega`. The power consumed by R

A

increases continuously

B

decreases continuously

C

first decreases then increases

D

first increases then decreases

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEM

    DC PANDEY|Exercise Only One Option is Correct|27 Videos

  • ELASTICITY

    DC PANDEY|Exercise Medical entrances s gallery|21 Videos

Similar Questions

Explore conceptually related problems

Statement I: When an external resistor of resistance R (connected across a cell to internal resistance r ) is varied, power consumed by resistance R is maximum when R = r. Statement II: Power consumed by a resistor of constant resistance R is maximum when current through it is maximum.

A resistance R whose value is varied from 1 Omega to 5 Omega is connected to a cell of internal resistance 3 Omega . The power consumed by R.

A battery of internal resistance 2 Omega is connected ot a variable resistor whose value can vary from 4 Omega to 10 Omega . The resistance is initially set at 4 Omega . If the resistance is now increased then

When two resistors of resistances R_1 and R_2 are connected in parallel, the net resistance is 3 Omega . When connected in series, its value is 16 Omega . Calculate the values of R_1 and R_2 .

(a) A cell of emf E and internal resistance r is connected to a resistance R . (i) Relate r and R , so that power in R is maximum. (ii) Maximum power consumed by R . (iii) Efficiency. (b) Find value r in terms of R so that power in external circuit is maximum. (c) A battery of internal resistance 4Omega is connected to the network of resistance as shown in the figure. what must be the value of R so that maximum power is delivered to the network? what is tha maximum power?

Two heating coils of resistance 10 Omega and 20 Omega are connected in parallel and connected to a battery of emf 12V and internal resistance 1 Omega . The power consumed by them is in the ratio

A battery of emf 3V and internal resistance r is connected in series with a resistor of 55 Omega through an ammeter of resistance 1 Omega . The ammeter reads 50 mA. Draw the circuit diagram and calculate the value of r.

A battery of emf 3 volt and internal resistance r is connected in series with a resistor of 55 Omega through an ammeter of resistance 1 Omega . The ammeter reads 50 mA. Draw the circuit diagram and calculate the value of r.

two heading coils of resistances 10Omega and 20 Omega are connected in parallel and connected to a battery of emf 12 V and internal resistance 1Omega Thele power consumed by the n are in the ratio

DC PANDEY-CURRENT ELECTRICITY-All Questions
  1. The current density in a wire is 10A//cm^(2) and the electric field in...

    Text Solution

    |

  2. A resistor of resistance R is connected to a cell internal resistance ...

    Text Solution

    |

  3. Find the current through the 10(Omega)resistor shown in figure.

    Text Solution

    |

  4. Each resistance shown in the network is in ohm. Current through the re...

    Text Solution

    |

  5. The forward biased conection is :

    Text Solution

    |

  6. Four identical bulbs each rated 100 watt, 220 volts are connected acro...

    Text Solution

    |

  7. The reading of voltmeter is

    Text Solution

    |

  8. The ammeter shown in figure consists of a 480 Omega coil connected in ...

    Text Solution

    |

  9. When a galvanometer is shunted with a 4 Omega resistance, the deflecti...

    Text Solution

    |

  10. In the figure shown the current flowing 2 R is:

    Text Solution

    |

  11. The equivalent resistance between the points A and B is:

    Text Solution

    |

  12. In the circuit shown, what is the potential different V(PQ) ?

    Text Solution

    |

  13. Which of the following wiring diagrams could be used to experimentally...

    Text Solution

    |

  14. In the given circuit current flowing through the resistance 20Omega is...

    Text Solution

    |

  15. Power generated across a uniform wire connected across a supply is H. ...

    Text Solution

    |

  16. Rate of dissipation of Joule's heat in resistance per unit volume is (...

    Text Solution

    |

  17. The variation of current (I) and voltage (V) is as shown in figure A. ...

    Text Solution

    |

  18. Six resistors each of 10 ohm are connected shown. The equivalent resis...

    Text Solution

    |

  19. Thirteen resistances each of resistance R ohm are connected in the cir...

    Text Solution

    |

  20. In the given network, the euqivalent resistance between A and B is

    Text Solution

    |