physics

A 120-V motor has mechanical power output of 2.20 hp. It is 92.0% efficient in converting power that it takes in by electrical transmission into mechanical power.
(a) Find the current in the motor.

  1. 👍 0
  2. 👎 0
  3. 👁 106
asked by smita
  1. Po = 2.20hp * 746w./hp = 1641.2 Watts

    Pi = Po/0.92 = 1641.2/0.92 = 1784 Watts

    Pi = 120*I = 1784 W.
    I = 1784/120 = 14.9A.

    1. 👍 0
    2. 👎 0
    posted by Henry

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A 120-V motor has mechanical power output of 2.20 hp. It is 92.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor (A) (b) Find the energy delivered

    asked by priya on September 5, 2013
  2. physics

    A 120-V motor has mechanical power output of 3.20 hp. It is 81.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor. Answer: 24.6A (b) Find the

    asked by iva on May 2, 2011
  3. physics

    A 120-V motor has mechanical power output of 3.00 hp. It is 94.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the energy delivered to the motor by electrical transmission

    asked by blast on August 17, 2010
  4. physics

    A 120-V motor has mechanical power output of 3.00 hp. It is 94.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor. I got the same answers,17.5 A,

    asked by blast on August 17, 2010
  5. Physics

    A 120-V motor has mechanical power output of 2.00 hp. It is 82.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor (b) Find the energy delivered to

    asked by Jessi on October 18, 2009
  6. Physics

    Searches related to a motor lifts an elevator of mass m at constant speed. The power output of the motor is P and there are no frictional losses so that all the power output from the motor goes into lifting the elevator mass. What

    asked by Bobby on November 10, 2016
  7. Physics

    A motor lifts an elevator of mass m at constant speed. The power output of the motor is P and there are no frictional losses so that all the power output from the motor goes into lifting the elevator mass. What is the correct

    asked by Bobby on November 10, 2016
  8. algebra

    The power (P) required to run a motor is equal to the voltage (E) applied to that motor times the current (I) supplied to the motor. If the motor data says the motor uses 180 watts of power and the voltage applied to the motor is

    asked by laquel on June 11, 2012
  9. science

    A crane whose motor has a power input of 5.0 kW lifts a 120-kg load of bricks through a height of 30m in 90s. what is the efficiency of the crane, which is the ratio between its output power and its input power.

    asked by tasha on February 19, 2007
  10. Physics 8B

    A 280 electric motor is 90% efficient, meaning that 90% of the energy supplied to it ends up as mechanical work. If the motor lifts a 210 weight at 3.5 , how much current does it draw? Express your answer using two significant

    asked by hash on September 14, 2011

More Similar Questions