Magnetic Effects of Electric Current Flashcards
1
Q
What is the compass needle?
A
Tiny Pivoted Bar Magnet
2
Q
Like poles ______
A
Repel
3
Q
Unlike poles ________
A
Attract
4
Q
Magnetic field is a _________ quantity.
A
Vector
5
Q
The field line emerge at the _________ pole and merge at the ______ pole.
A
North, South
6
Q
What is the shape of the magnetic field lines of a bar magnet?
A
Closed curves
7
Q
What are some of the examples of magnetic substance?
A
Iron, cobalt and nickel
8
Q
A freely suspended magnet always points to the ________ direction.
A
North-South
9
Q
Who discovered the relationship between electricity and magnetism?
A
Hans Christian Oersted
10
Q
Which year did Oersted make his discovery?
A
1820
11
Q
What is the unit of Magnetic Field Strength
A
Oersted
12
Q
When the field lines are crowded__________.
A
The magnetic field is stronger
