Grade 9 science electricity:
Part B: True or False (K – 13 marks)
23. ______ Static electricity refers to electric charges that flow through a conductor in a controlled way.
24. ______ Lightning is an example of an electric current that is not controlled.
25. ______ Electrons move from the positive to the negative terminal of a battery in a circuit.
26. ______ A cell phone battery is an example of a secondary cell.
27. ______ If a switch is open in a series circuit, the circuit is complete and electrons are flowing.
28. ______ Wall outlets provide direct current.
29. ______ The difference in electric potential energy measured at two different points in a circuit is called current.
30. ______ Copper has a high electrical resistance.
31. ______ The lower the voltage of the source, the higher the current.
32. ______ The energy of electrons in a circuit decreases after they pass through the source.
33. ______ The cables that carry electricity from the generating station to your home are larger so that they can carry more current without heating up.
34. ______ Some appliances, like stoves, need to be connected to a higher voltage (240 Volt) circuit.
35. ______ Appliances that have failed to meet the government’s standards for electrical efficiency are given the Energy Star label.
Grade 9 science electricity:
Part B: True or False (K – 13 marks)
23. ______ Static electricity refers to electric charges that flow through a conductor in a controlled way.
24. ______ Lightning is an example of an electric current that is not controlled.
25. ______ Electrons move from the positive to the negative terminal of a battery in a circuit.
26. ______ A cell phone battery is an example of a secondary cell.
27. ______ If a switch is open in a series circuit, the circuit is complete and electrons are flowing.
28. ______ Wall outlets provide direct current.
29. ______ The difference in electric potential energy measured at two different points in a circuit is called current.
30. ______ Copper has a high electrical resistance.
31. ______ The lower the voltage of the source, the higher the current.
32. ______ The energy of electrons in a circuit decreases after they pass through the source.
33. ______ The cables that carry electricity from the generating station to your home are larger so that they can carry more current without heating up.
34. ______ Some appliances, like stoves, need to be connected to a higher voltage (240 Volt) circuit.
35. ______ Appliances that have failed to meet the government’s standards for electrical efficiency are given the Energy Star label.
