Charge carriers

Exercise and reference answers

Questions

1. Question

   In most substances the carriers of current are

   Choices

   1. protons
   2. electrons
   3. neutrons

   Correct choice

   electrons

2. Question

   In electrolytic liquids the carriers are

   Choices

   1. electrons only
   2. neutrons
   3. positive and negative ions

   Correct choice

   positive and negative ions

3. Question

   Current is defined as

   Choices

   1. net charge passing per unit time through an area
   2. charge per unit volume
   3. force per unit charge

   Correct choice

   net charge passing per unit time through an area

4. Question

   For electrons the charge q equals

   Choices

   1. +e
   2. −e
   3. 0

   Correct choice

   −e

Explanation