- #1
supersunshine
- 7
- 0
Homework Statement
A coil of 120 turns and radius of1.8 cm and resistance of 5.3 ohm is placed outside a solenoid. If the current in the solenoid is changed, what current appears in the coil while the solenoid is being changed?
Homework Equations
emf= -dflux/dt = A*dB/dt
emf=iR
Bsol= nui
The Attempt at a Solution
To solve this problem, first you would need to find the emf induced in the coil by the changing current in the solenoid, and then the current by i=emf/R
but I am confused how to apply this. my questions is;
1) to use emf= -dflux/dt, does this apply to the area of the solenoid or coil? i thought solenoid, but we are only given information about the coil
thank you for your help