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Induced Current and Motional Emf
The electric field in the metal bar causes a potential difference of V = El = vBl. If the bar slides along metal rails, as in the figure below, a closed circuit is set up with current flowing in the counterclockwise direction, up the bar and then around the metal rail back to the bottom of the bar. TInduced Current and Motional Emf
The electric field in the metal bar causes a potential difference of V = El = vBl. If the bar slides along metal rails, as in the figure below, a closed circuit is set up with current flowing in the counterclockwise direction, up the bar and then around the metal rail back to the bottom of the bar. This is called an induced current.
The moving bar is a source of an electromotive force, called motional emf, since the emf is generated by the motion of the bar.
The force is defined as:
The magnitude of the induced emf can be increased by increasing the strength of the magnetic field, moving the bar faster, or using a longer bar.
Example
A bar of length 10 cm slides along metal rails at a speed of 5 m/s in a magnetic field of 0.1 T. What is the motional emf induced in the bar and rails?
Now that we've defined motional emf, solving this problem is simply a matter of plugging numbers into the appropriate equation:
his is called an induced current.
What else can I help you with?
Why emf of battery driving potentiometer is greater than emf of the cell to be measured?
Bcoz the emf which is to be measured is less than emf of driving cell....
Can back emf in an inductor be in the same sense as emf of source?
yes..only the application is different.
What is Back emf of DC motor?
In dc motor, the armature conductors are revolving in the magnetic field and emf is induced in the armature conductors. The direction of the induced emf is in opposite direction to the applied voltage as per Flemings left hand rule. So, the induced emf in motor is called as back emf or counter emf. Vydehi
What is the difference between emf and mmf?
emf is electromotive force mmf is magnetic motive force emf drives electon where as mmf drives magnetic field
Where is it possible to buy an EMF meter?
EMF meters can be purchased online at dedicated sites such as 'LessEMF', 'Home Depot' and 'EMF Center'. Alternatively, you could try your luck with finding one on eBay or Amazon.
How are motion induced electric fields and motional emf related in the context of electromagnetic induction?
Motion-induced electric fields and motional emf are related in the context of electromagnetic induction because both phenomena involve the generation of an electric field due to a changing magnetic field. When a conductor moves through a magnetic field, it experiences a motional emf, which is the voltage induced in the conductor. This motional emf is caused by the motion-induced electric fields that are generated in the conductor as a result of the changing magnetic field. In essence, motion-induced electric fields lead to the generation of motional emf through electromagnetic induction.
Does motional emf call induced emf?
yes indused emf is also called motional emf. If an open coil is subjected to a variable magnetic field, at the ends of the coil a potential difference is induced which is called induced emf. If a coil is connected to an emf source and switched on, the rising current will produced an variable magnetic field which in turn produces an emf. It is called back emf.
What is the relationship between the motion of a conducting rod and the generation of motional emf within the rod?
The motion of a conducting rod can generate motional electromotive force (emf) within the rod. When the rod moves through a magnetic field, it experiences a change in magnetic flux, which induces an emf according to Faraday's law of electromagnetic induction. This emf can create an electric current in the rod, leading to the generation of electrical energy.
How can one effectively understand and solve problems related to motion-induced electric fields and motional emf in the context of mastering physics?
To effectively understand and solve problems related to motion-induced electric fields and motional emf in mastering physics, one must grasp the concepts of electromagnetic induction and Faraday's law. By applying these principles, one can analyze the motion of charged particles in magnetic fields and calculate the induced electric fields and emf. Practice and familiarity with relevant formulas and problem-solving techniques are key to mastering this topic in physics.
When was Pre-Motional Songs created?
Pre-Motional Songs was created in 2005.
What is the adjective form of motion?
The adjective form of the word "motion" is "motional", but the word "moving" would probably also work.
What is carry current?
the current carried by conductor, either static or motional
How are emf measured?
emf in volts
Why emf of battery driving potentiometer is greater than emf of the cell to be measured?
Bcoz the emf which is to be measured is less than emf of driving cell....
While discharging which is greater TPD or EMF?
EMF is greater
When was EMF - band - created?
EMF - band - was created in 1989.
When did EMF - band - end?
EMF - band - ended in 2009.
