Skip to content
QuizQuip
Sign up
Back to Chapter 5
Mark schemePDF

Chapter 5 Practice Paper: Static Electricity — question paper

QuizQuipPractice Series
QQ/S4PH/CH5

Secondary 4 · Physics (G2 / G3)

Chapter 5 Practice Paper

Static Electricity

Duration: 40 minutes
Total: 30 marks
Name:
Class:
Register No.:
Date:

READ THESE INSTRUCTIONS FIRST

  • Write your name, class and register number in the spaces at the top of this page.
  • Answer all questions.
  • Give numerical answers correct to 3 significant figures unless stated otherwise.
  • Diagrams should be drawn clearly with a ruler.
  • The number of marks is given in brackets [ ] at the end of each question or part question.
  • The total number of marks for this paper is 30.

Original practice material written for the MOE Physics syllabus. It is not an official MOE or school examination paper. Charging by friction as electron transfer, insulators and conductors, electric fields and field-line patterns, charging by induction, the gold-leaf electroscope, hazards and applications including earthing and the electrostatic precipitator.

For Examiner’s Use
Section A/ 10
Section B/ 20
Total/ 30

Section A: Multiple-choice questions[10 marks]

Choose the one correct answer for each question.

  1. 1

    The SI unit of electric charge is the

    1. Aampere
    2. Bvolt
    3. Cnewton
    4. Dcoulomb
    ( )
  2. 2

    A polythene rod becomes negatively charged when rubbed with a dry cloth because

    1. Aprotons move from the cloth onto the rod
    2. Belectrons move from the cloth onto the rod
    3. Celectrons move from the rod onto the cloth
    4. Dprotons move from the rod onto the cloth
    ( )
  3. 3

    Two suspended charged spheres push each other apart. They must carry

    1. Aopposite charges
    2. Bthe same type of charge
    3. Cno charge
    4. Dequal and opposite charges
    ( )
  4. 4

    Electric field lines never

    1. Astart on positive charge
    2. Bend on negative charge
    3. Ccross one another
    4. Dpoint from positive to negative
    ( )
  5. 5

    An insulated metal sphere is charged by induction with an earth touch, using a negatively charged rod. The final charge on the sphere is

    1. Apositive
    2. Bnegative
    3. Czero
    4. Dequal to that of the rod
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

  1. 1

    A student rubs an acetate strip with a dry duster and brings it close to a thin stream of water from a tap. The stream bends toward the strip.

    1. (a)

      Explain why the water stream is attracted although it is uncharged overall.

      [3]
    2. (b)

      State what charge the duster carries after the rubbing, and why.

      [2]
  2. 2

    Two insulated metal spheres, A and B, touch each other. A negatively charged rod is brought near to sphere A, and while the rod stays in place, sphere B is moved away. The rod is then removed.

    1. (a)

      State the charge induced on the near face of A while the rod is nearby.

      [1]
    2. (b)

      State the final charge on each sphere after separation.

      [2]
    3. (c)

      Explain why the spheres must be metal rather than plastic for this to work.

      [2]
    4. (d)

      The rod is now brought near sphere A again. State and explain what happens to a second positively charged sphere hung nearby.

      [2]
  3. 3

    An electrostatic precipitator cleans the smoke from a factory chimney.

    1. (a)

      Describe how the precipitator charges the smoke particles.

      [2]
    2. (b)

      Explain how the charged particles are removed from the smoke.

      [3]
    3. (c)

      State one other useful application of electrostatic charging and one hazard of unwanted charging, each with a one-line reason.

      [3]

— End of paper —