Charge, conductors, insulators and semiconductors

Answer Key - Grade 11 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   Two identical metal spheres on insulating stands carry 6 nC and -2 nC. They touch and are pulled apart. What charge does each carry now, Ari?

   2 nC
2. 2.

   Two identical metal spheres on insulating stands carry -9 nC and 5 nC. They touch and are pulled apart. What charge does each carry now, Bo?

   -2 nC
3. 3.

   Two identical metal spheres on insulating stands carry 10 nC and -4 nC. They touch and are pulled apart. What charge does each carry now, Esme?

   3 nC

4. Read this first

   Use this

   (example data); rubbed on a.

6. 4.

   In the diagram, which object gained electrons, Jun?

   • Neither of them
   • The balloon
   • The wool cloth
7. 5.

   In the diagram, what charge does the wool cloth have, Kira?

   Use the picture in question 4.

   • Positive
   • Negative
   • No charge
8. 6.

   In the diagram, what is the total charge of the balloon and cloth together, Luz?

   Use the picture in question 4.

   • 6 minus
   • Zero
   • 12 plus
9. 7.

   Is a copper wire a conductor, an insulator or a semiconductor, Milo?

   • Semiconductor
   • Conductor
   • Insulator
10. 8.

    Is a plastic comb a conductor, an insulator or a semiconductor, Noah?

    • Insulator
    • Semiconductor
    • Conductor
11. 9.

    Is pure silicon a conductor, an insulator or a semiconductor, Pia?

    • Insulator
    • Semiconductor
    • Conductor
12. 10.

    A negative balloon is held near the positive wool cloth. What happens, Tala?

    • They pull together
    • They push apart
    • They trade places