Home
Class 12
PHYSICS
The power rating of an electric motor th...

The power rating of an electric motor that draws a current of `3.75 A`, when operated at `200 V`, is nearly

A

` 54 W`

B

`1 hp`

C

`500 W`

D

`750 hp`

Text Solution

Verified by Experts

The correct Answer is:
B

`P = 200 xx 3.75 W = 750 W ~~ 1 hp`
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

The armature of a DC motor has 20Omega resistance. It draws a current of 1.5 A when run by 200 V DC supply The value of back emf induced in it will be

The armature of a DC motor has 20Omega resistance. It draws a current of 1.5 A when run by 200 V DC supply The value of back emf induced in it will be

The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 V ?

An electric gadget draws a current 200 mA from a battery of 12 V. Find its resistance.

when the speed of a dc motor increase the armature current

An installation consisting of an electric motor driving a water pump left 75 L of water per second to a height of 4.7 m . If the motor consumes a power of 5 k W , then efficiency of the installation is

When a p-n junction is reverse-biased,the current becomes almost constant at 25µA. current of when it is forward biased at 200 mV . a current of 75µA is obtained.Find the magnitude of diffusion current when the diode is (a)unbiased ,(b)reverse-biased at 200 mVand (c )forward-biased at 200mV.

A motor operating on 120 V draws a current of 2 A . If the heat is developed in the motor at the rate of 9 cal s^(-1) , what is the efficiency?

An electric motor is designed to work at 100 V and draws a current of 6 A . The output power supplied by the motor is 150 W , find the power remaining in the motor and its percentage efficiency?

An electric motor operating on a 50 V dc supply draws a current of 12 A . If the efficiency of the motor is 30 % ,estimate the resistance of the windings of the motor.

CENGAGE PHYSICS ENGLISH-HEATING EFFECT OF CURRENT-Single Correct
  1. How many calories of heat will be produced approximately in 210 watt ...

    Text Solution

    |

  2. A constant voltage is applied between two ends of a metallic wire if t...

    Text Solution

    |

  3. The power rating of an electric motor that draws a current of 3.75 A, ...

    Text Solution

    |

  4. A cable of resistance 10 Omega carries electric power from a generator...

    Text Solution

    |

  5. a cable of resistance 10 ohm carries electric power from a generator p...

    Text Solution

    |

  6. The heat generated through 4 Omega and 9 Omega resistances separately ...

    Text Solution

    |

  7. If the length of the filament of a heater is reduced by 10%, the power...

    Text Solution

    |

  8. A 2k W heater used for 1 h every day consumes the following electrica...

    Text Solution

    |

  9. Two cells, each of emf E and internal resistance r are connected in pa...

    Text Solution

    |

  10. A constant voltage is applied between the two ends of a uniform metall...

    Text Solution

    |

  11. A given resistor cannot carry currents exceeding 20 A, without exceedi...

    Text Solution

    |

  12. A wire when connected to 220 V mains supply has power dissipation P(1)...

    Text Solution

    |

  13. A 220 volt, 1000 watt bulb is connected across a 110 volt mains supply...

    Text Solution

    |

  14. A heater coil is cut into two equal parts and only one part is now use...

    Text Solution

    |

  15. Three 10 Omega , 2 W resistors are connected as in Fig. 7.34. The maxi...

    Text Solution

    |

  16. A torch bulb rated 4.5 W, 1.5 V is connected as shown in Fig. 7.35. Th...

    Text Solution

    |

  17. A heater is designed to operate with a power of 1000 W in a 100 V line...

    Text Solution

    |

  18. The supply voltage to a room is 120 V. The resistance of the lead wire...

    Text Solution

    |

  19. Figure 7.37 shows a network of three resistances. When some potential...

    Text Solution

    |

  20. Resistors P , Q , and R in the circuit have equal resistances. If the ...

    Text Solution

    |