Module 1 Flashcards
independently
discovered that magnetism could
produce an electric current in a wire
Michael Faraday and Joseph Henry
an electric current can be induced in a circuit by
a changing magnetic field
an induced emf is produced in the secondary circuit by the
changing magnetic field
The emf (electromotive force) induced in a circuit is ____ to the
time rate of change of the magnetic flux through the circuit.
directly proportional
emf
electromotive force
Ways of Inducing an emf
- Magnetic field can change over time.
- Area enclosed by the loop can change over time.
- Angle between magnetic field and loop’s normal can change over time.
the production of an electromotive force (i.e., voltage) across an electrical conductor due to its dynamic interaction with a magnetic field.
Electromagnetic Induction
APPLICATION OF ELECTROMAGNETIC INDUCTION:
- electric generator
- eddy currents
- transformers
When a magnet is moved toward the loop, the galvanometer needle
deflects in one
direction
When the magnet is moved away from the loop, the needle
deflects in the opposite direction
When the magnet is held stationary relative to the loop
no deflection is observed
if the magnet is held stationary and the loop is moved either toward or away from it
the needle deflects
What is electromagnetic induction
A. The production of an electric current created by a varying magnetic field
B. The production of the magnetic field, accomplished by running a
current through a coil of wire
C. Creating electromagnetic fields by any purposeful means
D. Building a magnet
A
If a wire is moved perpendicular to the magnetic field, what is induced
across the ends of the wire
A. area
B. coil
C. magnetic field
D. potential difference
D
All matters are said to be neutral wherein the numbers of electron and protons are
equal so once charges it do not stay for a long time because of the following factors
except;
A. faster
B. slower
C. in opposite direction
D. parallel to the magnetic field
A
