Electric Field Outside a Solenoid

Click For Summary
The discussion revolves around calculating the electric field outside a solenoid with specific parameters, including a radius of 1.85 cm and 1110 turns per meter, where the current varies over time as I = 2.50t. The relevant equation for the electric field is provided, incorporating constants and variables such as the permeability of free space and the distance from the solenoid's axis. Initially, the user calculated the electric field to be 1.09x10^{-4} V/m but later realized their calculation contained an error. The user ultimately found the mistake in their calculations. The thread highlights the importance of careful unit conversion and application of formulas in physics problems.
sashab
Messages
12
Reaction score
0

Homework Statement



A solenoid has a radius of 1.85 cm and 1110 turns per meter. Over a certain time interval the current varies with time according to the expression I = 2.50t, where I is in amperes and t is in seconds. Calculate the electric field 5.47 cm from the axis of the solenoid.


Homework Equations



E = (μ_{0}n/2)(di/dt)(R^{2}/r), r>R

Where μ_{0} = 4∏x10^{-7}, n = 1110 turns/meter, di/dt = 2.50, R = 0.0185m, r=0.0547m

The Attempt at a Solution



After plugging in all the numbers and putting things in the right units, I got 1.09x10^{-4} V/m, but this is incorrect. If someone could tell me where I went wrong, I would really appreciate it! Thanks
 
Physics news on Phys.org
Nevermind, I found my mistake!
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
View full post »

Similar threads

Understanding self-inductance in a solenoid.
  • · Replies 3 ·
Replies
3
Views
2K
Calculating magnetic field outside a solenoid
  • · Replies 15 ·
Replies
15
Views
1K
Direction and magnitude of electric field produced by current change
  • · Replies 8 ·
Replies
8
Views
1K
Current in circular wire surrounding infinite solenoid in a circuit
  • · Replies 7 ·
Replies
7
Views
1K
Magnetic field outside a semi-infinite solenoid
  • · Replies 12 ·
Replies
12
Views
2K
Induced EMF in a coil outside a solenoid
  • · Replies 15 ·
Replies
15
Views
7K
Induced Current Problem from the professor not in our textbook
  • · Replies 2 ·
Replies
2
Views
2K
Calculating Induced EMF in a Larger Solenoid Slipped Over Another Solenoid
  • · Replies 5 ·
Replies
5
Views
2K
Electron in a time variable magnetic field
  • · Replies 5 ·
Replies
5
Views
2K
Calculating Current in a Wire Loop Inside and Outside a Solenoid
  • · Replies 9 ·
Replies
9
Views
6K