Metal frame moved through uniform magnetic field

AI Thread Summary
A square metal frame PQRS is moved through a uniform magnetic field with a flux density of 2.0 × 10–2 T. When entering the magnetic field, the current flows in an anti-clockwise direction, while there is no current in the middle as the frame does not cut any magnetic lines of flux. Upon exiting the field, the current flows clockwise. The direction of the current is determined using Lenz's Law rather than Fleming's Left Hand Rule. Understanding these principles is crucial for analyzing electromagnetic induction in moving conductors.
Masafi
Messages
58
Reaction score
0
A square rigid metal frame PQRS, of side 12 cm, forms a closed circuit with an ammeter. It is moved through an enclosed region of uniform magnetic field of flux density 2.0 × 10–2 T, from left to right. The field is confined to this area and directed into the page.

PQRS --> magnetic field -->

Give the direction of the current through the ammeter when enterting, in the middle, and leaving:

1. entering: anti clockwise
2. middle: no current (not cutting any lines of flux)
3. leaving: clockwise

How do we determine the direction of the current? I cannot do this using Flemings Left Hand rule?
 
Physics news on Phys.org
Lenz's Law.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »

Similar threads

Non-Uniform Magnetic Field Calculations
Replies
9
Views
2K
How does an eddy current brake work exactly?
Replies
2
Views
2K
Induced Current Direction in a Changing Magnetic Field
Replies
1
Views
2K
Motional EMF in the presence of a time-varying magnetic field
Replies
11
Views
3K
Does a Bent Wire Affect Induction Calculations?
Replies
7
Views
2K
Why is magnetic field B along a straight wire circular not radial?
Replies
14
Views
3K
Modelling a metal detector using eddy currents from Non-Destructive Testing
Replies
1
Views
933
Correct statement about coils moving in and out of a magnetic field
Replies
12
Views
2K
Finding magnetic field using Ampere's Circuital Law
Replies
5
Views
1K
Direction of current as bar magnet moves uniformly through copper ring
Replies
3
Views
1K

Hot Threads

Recent Insights

Back
Top