Physics

An elliptical loop of wire has an area of 2m^2.The magnetic field coming out of the page starts from zero and increases according to B(t)=3t^3 Tesla.(a)At what point in time will the voltage measured across 10 ohm resistor is 1 volt.(b)What will be the magnitude and direction of current at this time

  1. 👍 0
  2. 👎 0
  3. 👁 73
asked by Samrah
  1. B=2t^3
    dB/dt=6t^2

    voltage=dB/dt)area
    voltage=6t^2*2=12t^2
    t=sqrt(1/12)

    current? V/R

    direction> use your finger rules, I can't determine from description of problem.

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    Would someone check this please? A circular loop of wire of radius 0.10 m and of resistance 2.0 ~ 10−3 ƒ¶ is in a region where there is a uniform magnetic field B. The field is at 30‹ to the normal to the plane of the

    asked by charlie on June 18, 2009
  2. Physics

    Would someone check this please? A circular loop of wire of radius 0.10 m and of resistance 2.0 x 10^−3 ohms is in a region where there is a uniform magnetic field B. The field is at 30deg to the normal to the plane of the wire

    asked by charlie on June 19, 2009
  3. Physics

    Would someone check this please? A circular loop of wire of radius 0.10 m and of resistance 2.0 x 10^−3 ohms is in a region where there is a uniform magnetic field B. The field is at 30deg to the normal to the plane of the wire

    asked by charlie on June 20, 2009
  4. physics

    hi thank you for your help: i have a question that deals with finding the direction and magnitude of the net magnetic force on a loop that is next to a wire (the loop is in the wire's magnetic field) how do i set up a question

    asked by kiksy on April 4, 2011
  5. Physics, emf, magnetic flux

    A circular loop of wire with radius 0.100 m and resistance R = 5.00 Ω. The loop is placed in a magnetic field of strength B = 0.125 T, which can be rotated. The angle of the magnetic field with respect to the normal of the loop

    asked by Anon on January 24, 2018
  6. Physics-Please check

    Electricity may be generated by rotating a loop of wire between the poles of a magnet. The induced current is greates when: a.Plane of loop makes an angle 45 degrees with the magnetic field b.The plane of the loop is parallel to

    asked by Annie on May 2, 2011
  7. PHYSICS

    A circular loop of flexible iron wire has an initial circumference of 168cm , but its circumference is decreasing at a constant rate of 15.0cm/s due to a tangential pull on the wire. The loop is in a constant uniform magnetic

    asked by sarah on September 8, 2012
  8. Physics

    An infinite straight wire carrying a current I=5 A flowing to the right is placed above a rectangular loop of wire with width w=11 cm and length L=27 cm, as shown in the figure below. The distance from the infinite wire to the

    asked by Annoyingmous on June 14, 2013
  9. Physics

    An infinite straight wire carrying a current I=5 A flowing to the right is placed above a rectangular loop of wire with width w=11 cm and length L=27 cm, as shown in the figure below. The distance from the infinite wire to the

    asked by Annoyingmous on June 15, 2013
  10. Physics

    A single conducting loop of wire has an area of 7.4 10-4 m2 and a resistance of 110 Ω. Perpendicular to the plane of the loop is a magnetic field of strength 0.18 T. At what rate (in T/s) must this field change if the induced

    asked by Valerie on April 7, 2013

More Similar Questions