Courtney has been practicing bending wires into different shapes – and she’s get
ID: 1795052 • Letter: C
Question
Courtney has been practicing bending wires into different shapes – and she’s getting rather good at it! Let’s say she’s playing around in a lab where there is a magnetic field pointing vertically downwards of 0.55 T. She starts with a circular loop of wire that has a diameter is 25 cm. She always keeps the wire flat on the desk, and in a mere 0.15 seconds transforms it into a skinny rectangle (with a small edge of 3.5 cm). Wow!What EMF was generated in that wire during the transformation? Courtney has been practicing bending wires into different shapes – and she’s getting rather good at it! Let’s say she’s playing around in a lab where there is a magnetic field pointing vertically downwards of 0.55 T. She starts with a circular loop of wire that has a diameter is 25 cm. She always keeps the wire flat on the desk, and in a mere 0.15 seconds transforms it into a skinny rectangle (with a small edge of 3.5 cm). Wow!
What EMF was generated in that wire during the transformation? Courtney has been practicing bending wires into different shapes – and she’s getting rather good at it! Let’s say she’s playing around in a lab where there is a magnetic field pointing vertically downwards of 0.55 T. She starts with a circular loop of wire that has a diameter is 25 cm. She always keeps the wire flat on the desk, and in a mere 0.15 seconds transforms it into a skinny rectangle (with a small edge of 3.5 cm). Wow!
What EMF was generated in that wire during the transformation?
Explanation / Answer
here ,
magnetic field , B = 0.55 T
t = 0.15 s
EMF generated = B * change in flux/time taken
EMF generated = 0.55 * (pi * (0.25/2)^2 - 0.035^2)/.15
EMF generated = 0.175 V
the EMF generated is 0.175 V