Question

Electrons are emitted from a conductor when the conductor is

A. exposed to weak light.
B. bombarded by high-speed electrons.
C. cooled rapidly.
D. subjected to a small voltage.

Answer 1

B. Is the answer .
hope helped :)

Answer 2

Electrons, the negatively charged particles that carry electricity in metals, can be ejected from the material if it is bombarded by a large number of high-speed electrons. This effectively, leads to some metallic electrons being "knocked" out of the material.