A coil is wrapped with 300 turns of wire on the perimeter of a circular frame (radius = 8.0 cm). Each turn has the same area, equal to that of the frame. A uniform magnetic field is turned on perpendicular to the plane of the coil. This field changes at a constant rate from 20 to 80 mT in a time of 20 ms. What is the magnitude of the induced emf in the coil at the instant the magnetic field has a
magnitude of 50 mT?
a. 24 V
b. 18 V
c. 15 V
d. 10 V
e. 30 V
b
You might also like to view...
The diameter and luminosity of a galaxy do not determine its type
a. True b. False Indicate whether the statement is true or false
What evidence is there linking the Crab nebula to a supernova?
What will be an ideal response?
In the Lawson number what do the n and stand for?
a. ion density, critical ignition temperature b. ion density, confinement time c. neutrino density, confinement time d. ion density, critical ignition temperature e. neutrino density, reaction mean life
A metal wire of resistance R is cut into three equal pieces that are then placed together side by side to form a new cable with a length equal to one-third the original length. What is the resistance of this new cable?
1. 1/9 R 2. 1/3 R 3. R 4. 3R 5. 9R