Question

When a potential difference is put across a wire, ___.

a. electron speeds decrease
b. electrons drift slowly toward the positive end of the wire
c. conduction of electricity ceases
d. electron energy lessens

Answer 1

option (b)

Step-by-step explanation:

As the potential difference is applied accros a wire, the electron drifts slowly towards the positive end of the wire as the electrons are negatively charged so they attract towards the positive end.

Answer 2

b. electrons drift slowly toward the positive end of the wire

Step-by-step explanation:

Motion of electrons constitutes current. According to Ohm's law, the current in the wire is directly proportional to the potential difference across the two ends of the wire.

I ∝ V

⇒V = I R

When potential difference is put, the electrons towards the positive end. Thus, option b is correct.