What happens when a switch is closed in a circuit with two coils?

Click For Summary
SUMMARY

When the switch is closed in a circuit with two coils, the meter reading will deflect to the left, indicating the direction of current flow. According to Lenz's Law, if a North pole (N) is generated in the first coil, a corresponding North pole must be produced in the second coil to oppose the change. This interaction creates distinct magnetic fields in both coils, influencing the overall circuit behavior. The analysis confirms the application of Lenz's Law in predicting the effects of closing the switch.

PREREQUISITES
  • Understanding of Lenz's Law in electromagnetism
  • Basic knowledge of electric circuits and current flow
  • Familiarity with magnetic field concepts
  • Ability to interpret circuit diagrams and meter readings
NEXT STEPS
  • Study Lenz's Law and its applications in electromagnetic circuits
  • Learn about the behavior of inductors in AC and DC circuits
  • Explore the principles of magnetic fields and their interactions
  • Investigate circuit analysis techniques for complex circuits
USEFUL FOR

Students studying physics, electrical engineers, and anyone interested in understanding the principles of electromagnetism and circuit behavior.

mogley76
Messages
17
Reaction score
0

Homework Statement



when the switch is closed , describe what will happen to the meter reading, the direction of the current flow, if any, and the magnetic fields produced in the two coils

Homework Equations



none

The Attempt at a Solution



the current flow is shown in the pic attached , the meter reading will deflect to the left?

please have a look at the pic attached and see if I've done it all right??
 

Attachments

  • 2011-05-20 23.33.57.jpg
    2011-05-20 23.33.57.jpg
    6.3 KB · Views: 449
Physics news on Phys.org
I think if you apply Lenz's law to that scenario, if N is produced in the circuit on the left, then in order to produce the opposite effect due to the production of a N pole, a similar N pole would need to be produced on the second circuit on the left.

(I may be wrong since I am not too well versed in these conceptual problems)
 
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?

Similar threads

  • · Replies 1 ·
Replies
1
Views
794
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 12 ·
Replies
12
Views
3K
Replies
12
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 15 ·
Replies
15
Views
3K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 9 ·
Replies
9
Views
4K
Replies
5
Views
2K