Author Question: Metal detectors that locate metal beneath sand on a beach are activated by A) electric fields. ... (Read 68 times)

Engineer · **on:** Jul 29, 2018

Metal detectors that locate metal beneath sand on a beach are activated by

A) electric fields.
B) magnetic fields.
C) electromagnetic induction.
D) alternating current.

Question 2

When a bar magnet is thrust at the same speed into a coil having twice the number of loops, the induced voltage is

A) half.
B) the same, no different.
C) twice as much.
D) four times as much.
E) none of the above