Calculating Induced EMF and Current in a Moving Bar with Magnetic Field B = 1 T

Click For Summary
SUMMARY

The discussion focuses on calculating the induced electromotive force (emf) and current in a circuit involving a moving bar in a magnetic field. The bar, measuring 1 meter in length, moves at a velocity of 10 m/s in a magnetic field of 1 T directed in the -z direction. The calculated induced emf is confirmed to be 10 V using the formula emf = vBL. Subsequently, the induced current is determined using Ohm's Law (I = V/R), where the resistance of the light bulb is 10 ohms, resulting in an induced current of 1 A.

PREREQUISITES
  • Understanding of electromagnetic induction principles
  • Familiarity with the formula for induced emf (emf = vBL)
  • Knowledge of Ohm's Law (I = V/R)
  • Basic concepts of circuits and resistance
NEXT STEPS
  • Explore the concept of Faraday's Law of electromagnetic induction
  • Learn about the applications of induced emf in real-world circuits
  • Study the effects of varying magnetic fields on induced currents
  • Investigate the relationship between motion and magnetic fields in different configurations
USEFUL FOR

Students studying physics, particularly those focusing on electromagnetism, as well as educators and anyone interested in practical applications of electromagnetic induction in circuits.

manda2110
Messages
1
Reaction score
0

Homework Statement


A bar of 1 m length aligned in y direction moves in +x direction at 10 m/s, in space where B = 1 T pointing in the -z direction. Calculate the motional EMF.
If the bar above, is a part of a circuit with a light bulb of 10 ohms resistance, what would be the induced current?



Homework Equations


emf= vBL
I don't know what to use to find the induced current


The Attempt at a Solution


I know how to find the emf. I found that to be 10 V. Am i correct on that? I am just confused on how to find the induced current
 
Physics news on Phys.org
Hi manda2110, welcome to PF.

The current in the circuit is

I = V/R, where V is the induced emf.
 
R is given in ur problem (the resistance of the bulb, 10 ohms)
u know V,
wheres the problem in finding I?
 

Similar threads

Potential difference defined in non-conservative electric field
  • · Replies 12 ·
Replies
12
Views
2K
How to measure the magnetic field/ induced fem in a system
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Questions about cancelation of induced EMF and minimizing eddy currents
  • · Replies 4 ·
Replies
4
Views
2K
Finding the induced EMF on a bar - Faraday¡s law
  • · Replies 1 ·
Replies
1
Views
2K
Induced current and force on circular loop in varying magnetic field
  • · Replies 4 ·
Replies
4
Views
1K
Induced EMF in a moving Loop Conductor
  • · Replies 3 ·
Replies
3
Views
3K
Need some confirmation regarding induced currents
  • · Replies 1 ·
Replies
1
Views
887
What is the induced magnetic force on this closed current loop?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad What Causes Induced EMF in Conductive Bars Moving Through Magnetic Fields?
  • · Replies 20 ·
Replies
20
Views
3K
High School A question about induced current in LC circuits
  • · Replies 4 ·
Replies
4
Views
2K