Home
Class 12
PHYSICS
Nichrome and copper wires of same length...

Nichrome and copper wires of same length and same radius are connected in sereis. Current is `I` passed through them. Which up more ? Justify your answer.

Text Solution

Verified by Experts

In series combination, I is same for nichrome and copper . As rate heat product = P = ` I^(2)R`
or ` P alpha R, , So, R _("nichrome")gt R _("copper")` for given length and diameters. Thus, nichrome will produce
more heat.
Promotional Banner

Topper's Solved these Questions

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION-B|52 Videos

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION-C|50 Videos

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise section -E|6 Videos

  • SAMPLE PAPER 2019

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION D|6 Videos

Similar Questions

Explore conceptually related problems

The same mass of copper is drawn into two wires 2 mm and 3mm thick. The two wires are connected in series and current is passed through them. The ratio of heat produced in the two wires is

The same mass of aluminium is draw into two wires 1mm and 2mm thick . Two wires are connected in series and current is passed through them. Heat produced in the wires is in the ratio.

Two heater wires, made of the same material and having the same length and the same radius, are first connected in series and then in parallel to a constant potential difference. If the rate of heat produced in the two cases are Hs and Hp respectively then (Hs)/(Hp) will be

A circular loop and a square loop are formed from the same wire and the same current is passed through them . Find the ratio of their dipole moments.

Two heating coils, one of fine wire and the other of thick wire of the same material and of the same length are connected in series and in parallel. Which of the following statement is correct ?

16cm^(3) of water flows per second through a capillary tube of radius a cm and of length l cm when connected to a pressure head of h cm of water if a tube of the same length and radius a/2 cm is connected to the same pressure head the quantity of water flowing through the tube per second will be-

The rate of steady volume flow of water through a capillary tube of length ' l ' and radius ' r ' under a pressure difference of P is V . This tube is connected with another tube of the same length but half the radius in series. Then the rate of steady volume flow through them is (The pressure difference across the combination is P )

Two wires of same length are made into a circle and square respectively. Currents are passed in then such that their magnetic moments are equal. Then the ratio of the magnetic field at their respective centres (circle:square) is

A wire of length L and 3 identical cells of negligible internal resistance are connected in series. Due to the current, the temperature of the wire is raised by DeltaT in a time t. A number N of similar cells is now connected in series with a wire of the same material and cross-section but of length 2L. The temperature of the wire is raised by the same amount DeltaT in the same time t. the value of N is

A wire of length L and 3 identical cells of negligible internal resistance are connected in series. Due to the current, the temperature of the wire is raised by DeltaT in a time t. A number N of similar cells is now connected in series with a wire of the same material and cross-section but of length 2L. The temperature of the wire is raised by the same amount DeltaT in the same time t. the value of N is

XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-SECTION-A
  1. Draw a plot showing variation of electric field with distance from th...

    Text Solution

    |

  2. State one factor which determines the intensity of light in the photon...

    Text Solution

    |

  3. An iron-cored solenoid has self- inductance. 2.8 H. When the core is r...

    Text Solution

    |

  4. An object is kept in front of a concave lens.What is the nature of the...

    Text Solution

    |

  5. When light travels from a rarer to denser medium, it loses some speed....

    Text Solution

    |

  6. A point charge +Q is placed in the vicinity of a conducting surface. D...

    Text Solution

    |

  7. Define modulation index. Why is it generally kept less than one ?

    Text Solution

    |

  8. The objective lenses of two telescope have the same apertures but thei...

    Text Solution

    |

  9. (a) Define the term 'conductivity' of a metallic wire. Write its SI un...

    Text Solution

    |

  10. Nichrome and copper wires of same length and same radius are connected...

    Text Solution

    |

  11. Do electromagnetic waves carry energy and momentum?

    Text Solution

    |

  12. How does the angle of minimum deviation of a glass prism vary, if the...

    Text Solution

    |

  13. Name the phenomenon which shows the quantum nature of electromagnetic ...

    Text Solution

    |

  14. Draw the pattern of electric lines, when a point charge - Q is kept ne...

    Text Solution

    |

  15. How does the mobility of electrons in a conductor change, if the poten...

    Text Solution

    |

  16. Define the term "threshold frequency", in the context of photolelectri...

    Text Solution

    |

  17. Define the term "Intensity" in photon picture of electromagnetic radia...

    Text Solution

    |

  18. What is the speed of light in a denser medium of polarising of polaris...

    Text Solution

    |

  19. Why is the transmission of signals using sky waves restricted to frequ...

    Text Solution

    |

  20. On what factors, does the maximum range of ground wave propagation dep...

    Text Solution

    |