Pre-lab: Electric Charge                             Name:

Choose the best answer

 

(2x à double value)  Describe an electroscope

 

If we had a beta emitter inside today’s electroscope (we don’t), what would be the resultant charge on the leaves?  And would they repel or attract?

  1. Protons, repel
  2. Protons, attract
  3. Electrons, repel
  4. Electrons, attract

 

 

The atom is made up of

  1. protons
  2. neutrons
  3. electrons
  4. all of the above

 

An atom that has a net positive charged is called

  1. positive atom
  2. proton atom
  3. positive ion
  4. negative ion

 

The nucleus consists of

  1. protons and electrons
  2. moving electrons
  3. electrons and neutrons
  4. neutrons and protons

 

2x  You decide to rub a PVC pipe with wool and

  1. the rod gains electrons from the fur
  2. the rod loses electrons from the fur
  3. causes the rod to become positive
  4. none of the above

We say that an atom has an electric charge if

  1. the atom has more electrons than neutrons
  2. the atom has less electrons than neutrons
  3. the atom has more electrons than protons
  4. All of the above

 

2x  A glass rod is rubbed with silk and

  1. the silk strips electrons from the rod
  2. the silk transfers electrons to the rod
  3. causes the rod to become negative
  4. none of the above

If a neutral atom loses an electron, the atom is

  1. negatively charged
  2. positively charged
  3. neutral
  4. None of the above

 

2x  A rigid rubber rod is rubbed with fur and

  1. the rod gains electrons from the fur
  2. the rod loses electrons from the fur
  3. causes the rod to become positive
  4. none of the above