Home
Class 12
PHYSICS
A 120 V potential difference is applied ...

A 120 V potential difference is applied to a space heater that dissipates 1500W during operation. (a) What is the resistance during operation? (b) At what rate do electrons flow through any cross section of the heater element?

Text Solution

Verified by Experts

The correct Answer is:
`(a) 9.60 Omega; (b) 7.81 xx 10^(19)//s`
Promotional Banner

Topper's Solved these Questions

  • CURRENT AND RESISTANCE

    RESNICK AND HALLIDAY|Exercise Practice Questions (Single Corret Choice Type)|39 Videos
  • CURRENT AND RESISTANCE

    RESNICK AND HALLIDAY|Exercise Practice Questions (Linked Comprehension)|5 Videos
  • CURRENT AND RESISTANCE

    RESNICK AND HALLIDAY|Exercise Checkpoints|6 Videos
  • CIRCULAR MOTION

    RESNICK AND HALLIDAY|Exercise CHECK POINTS|6 Videos
  • ELASTICITY

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (Integer Type)|3 Videos

Similar Questions

Explore conceptually related problems

A 1250 W heater operates at 115V . What is the resistance of the heating coil?

A heater contains a Nichrome wire ("resistivity "5.0 xx 10^(-7)Omega.m) of length 5.85 m, with an end-to-end potential difference of 112 V and with a dissipation power of 4000 W.(a) What is the wire's cross-sectional area? (b) If 100 V is used to obtain the same dissipation rate, what should the length be?

A potential difference of 3V is applied across a conductor of resistance 1.5 Omega . Calculate the number of electrons flowing through it in one second. Given charge on electron, e=1.6 xx10^(-19)C .

A potential difference of 120 V is applied to a coil at temperature of 12^@C and the current is 6A. What will be the mean temperature of the coil when the curreny has fallen to 3 A, the applied voltage being the same as before ? Given temperature coefficient of resistance coil is .00427^@C^(-1) at 0^@C .

A potential difference of 10 V is applied across a conductor of resistance 1 k Omega . Find the number of electrons flowing through the conductor in 5 minutes.

A potential difference V is applied to copper wire fo diameter d and lengt L, what will be the effect on, the electron drift speed by doubling (a) voltage V, (b) length L, and (c ) diameter d?

A current in a circuit is due to a potential difference of 30 V applied to a resistor of resistance 300 Omega . What resistance would permit the same current to flow, if the supply voltage was 300 V ?

The sinusoidal potential difference V shown in figure applied across a resistor R produces heat at a rate W. What is the rate of heat disspation when the squre wave potential diffrence V_(2) as shown in figure is applied across the resistor?

A 660-W electric lheater is hdesigned to operate from 129V lines. What is the resistance? What current does it draw? What is the rate of production of heat in calories per second? If the line voltage drops to 110V. What is power does the heater takes in waits? (J=4.2 joules per calorie).

RESNICK AND HALLIDAY-CURRENT AND RESISTANCE-Problems
  1. A small but measurable current of 1.2 xx 10^(-10) A exists in a copper...

    Text Solution

    |

  2. The current through the battery and resistors 1 and 2 in Fig. 26-26a i...

    Text Solution

    |

  3. A copper wire of cross-sectional area 2.40 xx 10^(-6)m^(2) and length ...

    Text Solution

    |

  4. For a current set up in wire for 28.0 d, a total of 1.36 xx 10^(26) el...

    Text Solution

    |

  5. The current-density magnitude in a certain circular wire is J= (2.75 x...

    Text Solution

    |

  6. A charged belt, 50 cm wide, travels at 30 m/s between a source of char...

    Text Solution

    |

  7. A wire initially has length L0 and resistance 5.00 Omega. The resistan...

    Text Solution

    |

  8. A human being can be electrocuted if a current as small as 50 mA passe...

    Text Solution

    |

  9. A 120 V potential difference is applied to a space heater that dissipa...

    Text Solution

    |

  10. A certain wire has a resistance R. What is the resistance of a second ...

    Text Solution

    |

  11. Figure 26-27 a shows a rod of resistive material. The resistance per u...

    Text Solution

    |

  12. A fuse in an electric circuit is a wire that is designed to melt, and ...

    Text Solution

    |

  13. How long does it take electrons to get from a car battery to the start...

    Text Solution

    |

  14. What is the current in a wire of radius R = 2.67 mm if the magnitude o...

    Text Solution

    |

  15. A certain cylindrical wire carries current. We draw a circle of radius...

    Text Solution

    |

  16. Figure 26-29a gives the magnitude E(x) of the electric fields that hav...

    Text Solution

    |

  17. Two conductors are made of the same material and have the same length....

    Text Solution

    |

  18. Near Earth the density of protons in the solar wind (a stream of parti...

    Text Solution

    |

  19. An isolated conducting sphere has a 20 cm radius. One wire carries a c...

    Text Solution

    |

  20. The magnitude of the current density in a certain lab wire with a circ...

    Text Solution

    |