A long solenoid (cylinder wrapped with many turns of wire) creates a magnetic field inside of it equal to B=µnI, where µ=4π*10^-7, m/A is the number of turns of wire per unit length, and I is the current in the wire. If the solenoid is very long, then outside (far from the ends) the field is zero.
a. Consider a solenoid with 100 turns of wire per cm (n=100cm^-1). If a current of 2A runs through it, what is the field inside?
b. Let the radius of the solenoid be R1= 2 cm, the radius of a small loop inside it be R2= 1 cm and the radius of a big loop outside it be R3= 5 cm. find the flux through the two loops.
c. Now suppose that the current is decreased at a constant rate from 2A to zero over a time of .2 seconds. What is the EMF induced in (around) each of the two loops (if there were breaks in them)?
Answers: 2
Another question on Physics
Physics, 21.06.2019 22:00
In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.
Answers: 1
Physics, 22.06.2019 13:30
Select the three ways that the parallel-plate capacitor differs from a car battery.
Answers: 1
Physics, 22.06.2019 17:20
The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.
Answers: 3
You know the right answer?
A long solenoid (cylinder wrapped with many turns of wire) creates a magnetic field inside of it equ...
Questions
English, 14.11.2019 04:31
English, 14.11.2019 04:31
