Home
Class 12
PHYSICS
An electric immersion heator of 1.08 k W...

An electric immersion heator of `1.08` k W is immersed in water. After the water has reached a temperature of `100^(@)C`, how much time will be required to produce 100 g of steam?

A

`50 s`

B

`420 s`

C

`105 s`

D

`210 s`

Text Solution

Verified by Experts

The correct Answer is:
D
`L` is the latent heat of vaporization of water, the heat required for producing `1 g` of team. So
`L = 540 cal = 540 xx 4.2 = 2268 J`
Energy supplied is `1080 Js^(-1)`. Time required to boil `100 g` of water is
`t = 540 xx 4.2 xx 100 //1080 = 210 s`
Promotional Banner

Topper's Solved these Questions

  • HEATING EFFECT OF CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Multiple Correct|5 Videos

  • HEATING EFFECT OF CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Assertion - Reasoning|6 Videos

  • HEATING EFFECT OF CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Subjective|8 Videos

  • GEOMETRICAL OPTICS

    CENGAGE PHYSICS ENGLISH|Exercise Integer Type|4 Videos

  • INDUCTANCE

    CENGAGE PHYSICS ENGLISH|Exercise Concept Based|8 Videos

Similar Questions

Explore conceptually related problems

An electric immersion heater of 1.08 kW is immersed in water . After it has reaches a temperature of 100^(@)C , how much time will be required to produce 100 g of steam?

Stream at 100^(@)C is passed into 20 g of water at 10^(@)C . When water acquires a temperature of 80^(@)C , the mass of water present will be [Take specific heat of water =1 cal g^(-1) .^(@)C^(-1) and latent heat of steam =540 cal g^(-1) ]

A heating coil of 2000 W is immersed in water . How much time will it take in raising the temperature of 1 L of water from 4^(@) C "to" 100^(@) C ? Only 80% of the thermal energy produced is used in raising the temperature of water.

Steam at 100^(@)C is passed into 20 g of water at 10^(@)C when water acquire a temperature of 80^(@)C , the mass of water present will be [Take specific heat of water = 1 cal g^(-1).^(@) C^(-1) and latent heat of steam = 540 cal g^(-1) ]

How much electricity in terms of Faraday is required to produce 100 g of Ca from molten CaCl_2 ?

In an industrial process 10 kg of water per hour is to be heated from 20^@C to 80^@C . To do this steam at 150^@C is passed from a boiler into a copper coil immersed in water. The steam condenses in the coil and is returned to the boiler as water at 90^@C . How many kilograms of steam is required per hour (specific heat of steam =1 cal//g^@C , Latent heat of vapourization =540 cal//g )?

1 g of ice at 0^@C is mixed with 1 g of steam at 100^@C . After thermal equilibrium is achieved, the temperature of the mixture is

One gram of water at 100^(@)C is converted to steam at the same temperature. The amount of heat required is nearest to the value of

100g ice at 0^(@)C is mixed with 100g water at 100^(@)C . The resultant temperature of the mixture is

100g of ice at 0^(@) is mixed with 100g of water at 100^(@)C . What will be the final temperature of the mixture?

CENGAGE PHYSICS ENGLISH-HEATING EFFECT OF CURRENT-Single Correct
  1. Four resistances carrying a current shown in Fig. 7.41 are immersed in...

    Text Solution

    |

  2. The three resistance of equal value are arranged in the different comb...

    Text Solution

    |

  3. An ideal gas is filled in a closed rigid and thermally insulated conta...

    Text Solution

    |

  4. The resistance in which the maximum heat is produced is given by ( Fig...

    Text Solution

    |

  5. The resistance of hot tungsten filament is about 10 times the cold res...

    Text Solution

    |

  6. The resistance of the filament of a lamp increases with the increase i...

    Text Solution

    |

  7. A wire of length L and three identical cell of negligible internal res...

    Text Solution

    |

  8. An electric immersion heator of 1.08 k W is immersed in water. After t...

    Text Solution

    |

  9. Two electric bulbs A and B are rated 60 and 100 W, respectively. If th...

    Text Solution

    |

  10. A 25 W and a 100 W bulb are joined in series and connected to the main...

    Text Solution

    |

  11. Two identical electric heaters each marked 1000 W 220 V are connected ...

    Text Solution

    |

  12. Figure 7.44 shows three similar lamps L(1) , L(2), and L(3) connectged...

    Text Solution

    |

  13. If a wire of resistance 20 Omega is covered with ice and a voltage of ...

    Text Solution

    |

  14. How many 60 W lamps may be safely run on a 230 V circuit fitted with ...

    Text Solution

    |

  15. It takes 16 min to boil some water in an electric kettle. Due to some ...

    Text Solution

    |

  16. A electric kettle ( rated accurately at 2.5 kW) is used to heat 3 kg o...

    Text Solution

    |

  17. a factory is served by a 220 V supply line . In a circuit protected by...

    Text Solution

    |

  18. If a given volume of water in a 220 V heater is boiled in 5 min, then...

    Text Solution

    |

  19. The charge flowing through a resistance R varies with time t as Q = a...

    Text Solution

    |

  20. A 100 W bulb designed to operate on 100 V is to be connected across a ...

    Text Solution

    |