Home
Class 12
PHYSICS
Calculate the electric current required ...

Calculate the electric current required to deposit `0.972 g` of chromium in three hours. ECE of chromium is `0.00018 g C^(-1)`

Text Solution

Verified by Experts

We have
`m=Zit`
or `0.972 g = (0.00018 g C^(-1) I ( 3 xx 3600 s)`
or, `(0.972)/(0.00018 xx 3 xx 3600) A = 0.50A`
Promotional Banner

Topper's Solved these Questions

  • THERMAL AND CHEMICAL EFFECT OF ELECTRIC CURRENT

    HC VERMA|Exercise Worked Out Examples|8 Videos

  • THERMAL AND CHEMICAL EFFECT OF ELECTRIC CURRENT

    HC VERMA|Exercise Short Answer|9 Videos

  • THE SPECIAL THEORY OF RELATIVITY

    HC VERMA|Exercise Exercises|27 Videos

  • X-Rays

    HC VERMA|Exercise Exercises|27 Videos

Similar Questions

Explore conceptually related problems

A steady current of 10.0 A is maintained in a copper voltmeter . Calculate the time required to deposit 2.5 g of copper . Relative atomic mass of copper = 63.5 g .

Calculate the following Number of atoms in 32.0 g Br_2

Calculate the no. of molecules in a drop of water weighing 0.07 g .

Calculate the time required to coat a metal surface of 80 cm^(2) with 0.005 mm thick layer of silver (density = 10.5 g cm^(3)) with the passage of 3A current through silver nitrate solution.

Calculate the molality of an aqueous solution containing 3.0g of urea (mol.mass=60) in 250g of water.

Calculate the total pressure in a 10 L cylinder which contains 0.4 g of helium, 1.6 g of oxygen and 1.4 g of nitrogen at 27^(@) C. Also calculate the partial pressures of He gas in the cylinder. Assume Ideal behaviour for gases. R = 0.082 L atm k^(-1) mol^(-1)

What current strength in amperes will be required to liberate 10 g of iodine from potassium iodide solution in one hour ?

A copper voltameter is connected in series with a coil of resistance 100Omega . A steady current flowing in the circuit for 10 minutes, gives a deposit of 0.1 g of copper in the voltameter. Calculate the heat generated in the resistance coil. (ECE of Cu 3.3xx10^(-7)kg//C )

HC VERMA-THERMAL AND CHEMICAL EFFECT OF ELECTRIC CURRENT-Exercises
  1. Calculate the electric current required to deposit 0.972 g of chromium...

    Text Solution

    |

  2. An electric current of 2.0 A passes through a wire of resistance 25 Om...

    Text Solution

    |

  3. A coil of resistance 100 Omega is connected across a battery of emf 6....

    Text Solution

    |

  4. The specification on a heater coil is 250 V, 500 W. Calculate the resi...

    Text Solution

    |

  5. A heater coil is to be constructed with a nichrome wire (rho = 1.0 xx ...

    Text Solution

    |

  6. A bulb with rating 250V, 100W is connected to a power supply of 220 V ...

    Text Solution

    |

  7. An electric bulb, when connected across a power supply of 220V, consum...

    Text Solution

    |

  8. A servo voltage stabiliser restricts the voltage output to 220 V +- 1%...

    Text Solution

    |

  9. An electric bulb marked 220 V, 100 W will get fused if it is made to c...

    Text Solution

    |

  10. An immersion heater rated 1000 W, 220 V is used to heat 0.01 m^3 of wa...

    Text Solution

    |

  11. An electric kettle used to prepare tea, takes 2 minutes to boil 4 cups...

    Text Solution

    |

  12. The coil of an electric bulb takes 40 watts to start glowing. If more ...

    Text Solution

    |

  13. The 2.0 Omega resistor show in figure is dipped into a calorimeter con...

    Text Solution

    |

  14. The temperatures of the junctions of a biamuth-silver thermocouple are...

    Text Solution

    |

  15. Find the thermo-emf developed in a copper-silver thermocopule when the...

    Text Solution

    |

  16. Find the neutral temperatuer and inversion temperature of copper-iron ...

    Text Solution

    |

  17. Find the charge required to flow through an electrolyte to liberate on...

    Text Solution

    |

  18. Find the amount of silver liberated at cathode if 0.500 A of current i...

    Text Solution

    |

  19. An electroplating unit plates 3.0 g of silver on a brass plate in 3.0 ...

    Text Solution

    |

  20. Find the time requried to liberate 1.0 litre of hydrogen at STP in an...

    Text Solution

    |

  21. Two voltameters, one having a solution of silver salt and the other of...

    Text Solution

    |