Home
Class 12
PHYSICS
A 12 HP motor has to be operated 8 hours...

A 12 HP motor has to be operated 8 hours / day . How much will it cost at the rate of 50 paisa / kWh in 10 days

A

Rs 347

B

Rs 358

C

Rs 375

D

Rs 397

Text Solution

Verified by Experts

The correct Answer is:
B
Energy `= (12 xx 746 xx 8 xx 3600 xx 10)/(3.6 xx 10^(6))`
`716.16` kWh
cost `= 716.16` kWh
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    ERRORLESS|Exercise ASSERTION AND REASON|26 Videos

  • CURRENT ELECTRICITY

    ERRORLESS|Exercise NCERT BASED QUESTIONS (HEATING EFFECT OF CURRENT)|67 Videos

  • ATOMIC AND NUCLEAR PHYSICS

    ERRORLESS|Exercise Assertion and Reason|23 Videos

  • ELECTROMAGNETIC INDUCTION

    ERRORLESS|Exercise ASSERTION & REASON|20 Videos

Similar Questions

Explore conceptually related problems

An electric iron rated 750 W is operated for 2 hours/day. How much energy is consumed by the electric iron for 30 days ?

An electric refrigerator rated 400 V operates 8 hour//day. What is the cost of the energy to operate it for 30 days at Rs. 3.00 per kWh ?

(a) Define 1 watt. (b) State the commercial unit of electric energy. Express it in terms of SI unit of energy. (c) An electric refrigerator rated as 750 W operates 8 hours per day. What is the cost of the energy to operate it for the month of June at Rs. 2.50 per kWh ?

24 men working 8 hours a day can finish a work in 10 days. Working at the rate of 10 hours a day, the number of men required to finish the same work in 6 days is:

A can do a piece of work in 6 days working 8 hours a day while B can do the same work in 4 days working 10 hours a day. If the work has to be completed in 5 days, so how many hours do they need to work together in a day?

Ten 50W bulbs are operated for 10 hours per day. The energy consumed in kWh in a 30 day month is

10 men working 5 hours/day earn ?300. How much money will 15 men working 10 hours/day earn?

8 hours is 50% of 4 days.

ERRORLESS-CURRENT ELECTRICITY-PAST YEARS QUESTIONS
  1. Ten identical cells connected is series are needed to heated a w...

    Text Solution

    |

  2. What will happen when a 40 watt 220 volt lamp and 100 watt-220 volt la...

    Text Solution

    |

  3. For ensuring dissipation of same energy in all three resistors (R(1), ...

    Text Solution

    |

  4. Two heating wires of equal length are first con nected in series and t...

    Text Solution

    |

  5. A 12 HP motor has to be operated 8 hours / day . How much will it cost...

    Text Solution

    |

  6. A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. W...

    Text Solution

    |

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

    Text Solution

    |

  8. which of the following acts as a circuit protection device?

    Text Solution

    |

  9. Six similar bulbs are connected as shown in the figure with a DC sourc...

    Text Solution

    |

  10. The solids which have negative temperature coefficient of resistance a...

    Text Solution

    |

  11. which of the following graph represents the variation of resistivity (...

    Text Solution

    |

  12. The colour code of a resistance is given below: The values of res...

    Text Solution

    |

  13. A charged particle having drift velocity of 7.5xx10^(-4)ms^(-1) in ele...

    Text Solution

    |

  14. A wire connected in the left gap of a meter bridge balance a 10Omega r...

    Text Solution

    |

  15. In a potentiometer circuit a cell of EMF 1.5V gives balance point at 3...

    Text Solution

    |

  16. The effective resistance of a parallel connection that consists of fou...

    Text Solution

    |

  17. Column I- gives certain physical terms associated with flow of current...

    Text Solution

    |

  18. Three resistors having resistances r(1), r(2) and r(3) are connected a...

    Text Solution

    |

  19. A series LCR circuit containing 5.0 H inductor, 80 mu F capacitor and ...

    Text Solution

    |

  20. Two conducting circular loops of radii R1 and R2 are placed in the sam...

    Text Solution

    |