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Q 1/20
Score 0
What is the fundamental rule for magnetic pole interaction?
30
All poles attract each other
All poles repel each other
Like poles repel, unlike poles attract
Like poles attract, unlike poles repel
Q 2/20
Score 0
What is the direction of magnetic field lines outside a bar magnet?
30
In random directions
From south to north
From north to south
They form closed circles with no direction
20 questions
Q.
What is the fundamental rule for magnetic pole interaction?
1
30 sec
Q.
What is the direction of magnetic field lines outside a bar magnet?
2
30 sec
Q.
What does the density of magnetic field lines represent?
3
30 sec
Q.
What is the fundamental source of all magnetic fields?
4
30 sec
Q.
What is the shape of the magnetic field around a straight current-carrying wire?
5
30 sec
Q.
Which rule is used to find the direction of the magnetic field around a straight wire?
6
30 sec
Q.
In the right-hand grip rule for a straight wire, what does the thumb represent?
7
30 sec
Q.
Where is the magnetic field strongest in a current-carrying circular coil?
8
30 sec
Q.
What is the magnetic field pattern inside a long solenoid?
9
30 sec
Q.
Which rule is used to find the north pole of a solenoid?
10
30 sec
Q.
How can you increase the magnetic field strength inside an air-core solenoid?
11
30 sec
Q.
What effect does inserting an iron core into a solenoid have?
12
30 sec
Q.
Why does a compass needle point toward geographic north?
13
30 sec
Q.
What causes the aurora borealis (northern lights)?
14
30 sec
Q.
Which two current-carrying structures create magnetic fields similar to bar magnets?
15
30 sec
Q.
What is the direction of the magnetic field at a point directly above a straight wire carrying current toward the north?
16
30 sec
Q.
In a current-carrying circular coil, if the current flows clockwise when viewed from one side, what pole is created on that side?
17
30 sec
Q.
Which of the following does NOT affect the strength of a solenoid's magnetic field?
18
30 sec
Q.
What happens to the magnetic field strength if you double both the current (I) and number of turns (N) in a solenoid? Relevant Equation: B = ( μₒ * N * I ) / L
19
30 sec
Q.
Which experimental discovery first showed the connection between electricity and magnetism?
