1)In the demonstration where a magnet is brought near a loop, which is true abou
ID: 3897741 • Letter: 1
Question
1)In the demonstration where a magnet is brought near a loop, which is true about the induced current if we move the magnet faster?
A)It is smaller and in the same direction as before.
B)It is larger and in the same direction as before.
C)The size and the direction are the same.
D)It is now smaller and in the opposite direction.
E)It is now larger and in the opposite direction.
F)The size is the same but the current is now reversed.
2)In the demonstration where a magnetic north pole is brought near a loop, which is true about the induced current if we use the same speed but switch to the south end of the magnet?
A)It is smaller and in the same direction as before.
B)It is larger and in the same direction as before.
C)The size and the direction are the same.
D)It is now smaller and in the opposite direction.
E)It is now larger and in the opposite direction.
F)The size is the same but the current is now reversed.
3)In the discussion about pulling the loop from the magnetic field, what causes the current in the loop?
A)The motion creates a magnetic field along the loop.
B)The motion decreases the magnetic flux through the loop, which induces a current.
C)The motion dissipates energy as thermal energy, which induces a current.
D)The motion increases the magnetic flux through the loop, which induces a current.
4)Which is true?
A)A changing magnetic field produces a constant perpendicular magnetic field.
B)A changing magnetic field produces a changing perpendicular magnetic field.
C)A changing magnetic field produces a constant parallel magnetic field.
D)A changing magnetic field produces a changing parallel magnetic field.
E)A changing magnetic field produces an electric field.
Explanation / Answer
1. B)It is larger and in the same direction as before.
2.F)The size is the same but the current is now reversed.
3.B)The motion decreases the magnetic flux through the loop, which induces a current.
4.E)A changing magnetic field produces an electric field.
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