Physics 2

Suppose, in the figure below, a 0.90-m rod experiences a 1.2-T magnetic field and the hand keeps it moving to the right at a constant speed of 3.5 m/s. If the current in the circuit is 0.040 A, what is the average power being delivered to the circuit by the hand?

  1. 👍 0
  2. 👎 0
  3. 👁 342
  1. There is no "figure below".

    Average power is the force on the bar multiplied by the velocity.

    The force on the bar is B*I*L
    L = 0.90 m
    B = 1.2 Tesla
    I = 0.040 A

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A thin copper rod 1m long has a mass of 50g. What should be the direction of magnetic field and the maximum current in the rod that would allow it to levitate above the ground in a magnetic field of 0.1T.

    asked by Raven on April 22, 2018
  2. physics

    A 0.2 kg conductor of length 0.8 m carries 2 ampere current to the right in a magnetic field. What is the magnitude and the direction of the magnetic field acting on the conductor if the net force on the rod is zero? (Assume that

    asked by unknown on June 12, 2011
  3. physics- answers check

    5. A magnetic field map shows a. the direction of the magnetic field. b. a few representational field lines. c. relative strength of the magnetic field. d. All of these choices are correct. my answer: d 6. Magnetic field lines a.

    asked by Liz on May 10, 2014
  4. Physics

    The figure below shows two current carrying wires and the directions of the currents they carry. The wires carry the following currents: I1 = 7.1 A and I2 = 8.9 A. Wire 1 is at (0, 5.8) mm; wire 2 is at (15.1, 0) mm; point P is at

    asked by Jessica on April 10, 2012
  1. College physIcs

    An electron travels at a speed of 4.0×104 m/s through a uniform magnetic field whose magnitude is 1.4×10−3 T. What is the magnitude of the magnetic force on the electron if its velocity and the magnetic field are

    asked by Lanise on February 19, 2010
  2. physics

    A moving proton with a speed of 0.3 m/s experiences a force of 1.5*10^-20N, when it enters at a right angle to the direction of the magnetic field. What is the magnitude of the magnetic field? Choose one answer. a. 0.3 Tesla b.

    asked by ashley --- HELP PLEASEE!!! on June 4, 2011
  3. Physics

    An electron experiences 1.2 x 10^-3 force when it enters the external magnetic field, B with a velocity v. What is the force experienced by the electron if the magnetic field is increased two times and the velocity is decreased to

    asked by Physics fail on January 25, 2013
  4. Physics

    The figure below shows a circular conducting loop with a 4.70-cm radius and a total resistance of 1.10 Ω placed within a uniform magnetic field pointing into the page. (a) What is the rate at which the magnetic field is changing

    asked by AAA on April 8, 2020
  1. College Physics Homework. Please help!

    A metal bar with a length of 0.30 m and mass of 0.5 kg is free to slide (no friction) on a set of vertical rails. The rails and bar together have a resistance of 500 ohms. The rails lie in a horizontal magnetic field with a

    asked by Rich on May 7, 2012
  2. Physics

    A 45-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 67 A and experiences a magnetic force of 0.15 N. Find the magnitude of the earth's magnetic field at the location of the

    asked by Anonymous on April 1, 2013
  3. Calculus and Vectors

    The magnetic force (Vector FM)on a particle in a magnetic field is found by Vector FM = Vector I × Vector B, Vector I is the charge multiplied by the velocity of a charged particle and Vector B the strength of the magnetic field,

    asked by Jackie on July 3, 2019
  4. Physics

    An electron experiences 1.2 x 10^-3 force when it enters the external magnetic field, B with a velocity v. What is the force experienced by the electron if the magnetic field is increased two times and the velocity is decreased to

    asked by Physics fail on January 25, 2013

You can view more similar questions or ask a new question.