Multiple Choice
Metal detectors, like the ones used at airports, are activated by
A) magnetic fields.
B) alternating current.
C) electromagnetic induction.
D) electric fields.
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q42: If the voltage produced by a generator
Q43: Disregarding the effects of friction, a cyclist
Q44: The voltage across the input terminals of
Q45: Electromagnetic induction occurs in a coil when
Q46: Disconnect a small-voltage battery from a coil
Q48: The force on an electron moving in
Q49: A step-up transformer has a ratio of
Q50: A transformer actually transforms<br>A) voltage.<br>B) generators into
Q51: As a motor armature turns faster and
Q52: Compared to the primary voltage, the secondary