Multiple Choice
To weaken a bar magnet
A) drop it on a hard surface.
B) put it in hot flames.
C) whack it with a hammer.
D) all of the above
E) none of the above
Correct Answer:
Verified
Correct Answer:
Verified
Q37: Cosmic rays penetrate your body when<br>A)safely in
Q38: Surrounding every magnet is<br>A)a magnetic field.<br>B)an electric
Q39: In general, a common magnet has<br>A)one pole.<br>B)at
Q40: An iron nail is more strongly attracted
Q41: Earth's magnetic field is<br>A)something we've learned to
Q43: A current-carrying coil of wire is<br>A)a superconductor.<br>B)a
Q44: When a current-carrying wire is bent into
Q45: Although a magnet can change the direction
Q46: A superconducting magnet uses<br>A)iron cores.<br>B)superconducting coils.<br>C)both of
Q47: The force a magnetic field exerts on