A technician wearing a metal watch with a resistance of 0.0200 Ω that encloses an area of 0.00500 m2. The technician is in the presence of a uniform magnetic field with a magnitude of 4.40 T directed perpendicular to the plane of the watch. The magnetic field then drops to a magnitude of 1.32 T (in the same direction) in a time of 22.0 ms.
a. Find the current induced in the bracelet.
b. Find the power (P) delivered to the bracelet.

Explanation:

Initial magnetic flux = magnetic field x area

= 4.4 x 5 x 10⁻³

= 22 x 10⁻³  weber

Final magnetic flux

= 1.32 x 5 x 10⁻³

= 6.6x  10⁻³ weber

change in magnetic flux = 15.4 x 10⁻³

emf induced = change in flux / time

= 15.4 x 10⁻³ / 22 x 10⁻³

= .7 V

current in bracelet = emf / resistance

= .7 / .02

= 35 A

b )

power = volt induced x current

= .7 x 35

= 24.5 W .

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods