Home
Class 12
PHYSICS
A heater coil is cut into two equal part...

A heater coil is cut into two equal part is now used in the heater. The heat generated will now be

A

Doubled

B

four times

C

one – fourth

D

Halved

Text Solution

Verified by Experts

A heat generated `H_1=V^2/R t and H_2=V^2/((R//2)) t therefore H_2/H_1=2 or H_2=2H_1`
Promotional Banner

Topper's Solved these Questions

  • DC CIRCUIT

    VMC MODULES ENGLISH|Exercise JEE ADVANCED ARCHIVE|68 Videos

  • DC CIRCUIT

    VMC MODULES ENGLISH|Exercise LEVEL-2 DAILY TUTORIAL SHEET-5|10 Videos

  • CURRENT ELECTRICITY

    VMC MODULES ENGLISH|Exercise IN-CHAPTER EXERCISE-F|10 Videos

  • DYNAMICS OF A PARTICLE

    VMC MODULES ENGLISH|Exercise JEE Advance (Archive) Level - II (SINGLE OPTION CORRECT TYPE )|31 Videos

Similar Questions

Explore conceptually related problems

A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be

A heater coil is cut into two parts of equal length and one of them is used in the leader. The ratio of the heat procued by this half coil to that by the original coil is

The coil of a 1 000W electric heater is cut into two equal parts. If the two parts are used separately as heaters, their combined wattage will

The power of a heating coil is P. It is cut into two equal parts. The power of one of them across same mains is :

The time period of a spring mass system of spring constant k and mass m is T. Now, the spring is cut into two equal parts and connected in parallel. If the same mass is attached to new arrangement, then new time period is

Two containers having boiling water and ice are connected through a conducting metal rod. The whole ice melts in time T. now the rod is cut into two equal parts and both parts are connected in parallel between the containers the time required to melt the same amount of ice will be

A heater coil c onnected across a give potential difference has power P . Now , the coil is cut into two equal halves and joined in parallel . Across the same potential difference, this combination has power

Power generated across a uniform wire connected across a supply is H . If the wire is cut into n equal parts and all the parts are connected in parallel across the same supply, the total power generated in the wire is

A heating coil is labelled 100 W, 220 V . The coil is cut in two equal halves and the two pieces are joined in parallel to the same source. The energy now liberated per second is

A heater coil is rated 100W,200V. It is cut into two identical parts. Both parts are connected together in parallel, to the same sources of 200V. Calculate the energy liberated per second in the new combination.

VMC MODULES ENGLISH-DC CIRCUIT-LEVEL-1 JEE MAIN ARCHIVE
  1. In the circuit shows in Fig. 6.44, the galvanometer G shows zero defle...

    Text Solution

    |

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

    Text Solution

    |

  3. A heater coil is cut into two equal part is now used in the heater. Th...

    Text Solution

    |

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

    Text Solution

    |

  5. A heater coil is cut into two parts of equal length and one of them is...

    Text Solution

    |

  6. The pressures at A and B in the atmosphere are, respectively,

    Text Solution

    |

  7. An electric bulb rated 220 V and 100 W. When it is operated on 110 V,...

    Text Solution

    |

  8. The resistance of a bulb filamanet is 100Omega at a temperature of 100...

    Text Solution

    |

  9. In a Wheatstone bridge, resistances P, Q, and R are connected in the t...

    Text Solution

    |

  10. The Kirchhoff's first law (Sigmai = 0) and second law (SigmaiR = Sigma...

    Text Solution

    |

  11. The current i drawn from the 5 V source will be

    Text Solution

    |

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

    Text Solution

    |

  13. Shown in the figure below is a meter-bridge set up with null deflectio...

    Text Solution

    |

  14. A 5V battery with internal resistance 2 Omega and a 2V battery with in...

    Text Solution

    |

  15. Consider a block of conducting material of resistivity 'rho' shown in ...

    Text Solution

    |

  16. Consider a block of conducting material of resistivity p shown in the...

    Text Solution

    |

  17. This quesiton contains Statement-1 and Statement-2. Of the four choice...

    Text Solution

    |

  18. Two conductors have the same resistance at 0^(@)C but their temperatur...

    Text Solution

    |

  19. If 400 Omega of resistance is made by adding four 100 Omega resistance...

    Text Solution

    |

  20. The resistivity of a potentiometer wire is 40xx10^(-8)Omega-m and its ...

    Text Solution

    |