Grade 7 Integrated Science – Static Electricity Quiz
1. What is static electricity?
2. How are static charges produced?
3. Which of the following are methods of charging objects?
4. .......charges are produced when two materials are rubbed against each other.
5. We have ..... types of charges.
6. Which one is a type of charge?
7. When charged objects are brought together,they may..........
8. What happens when two balloons are brought together before they were rubbed?
9. What happens when one balloon is rubbed and brought close to another uncharged balloon?
10. Which statement is true?
11. Which of the following is not a use of charges in our daily life?
12. Which one is not a safety measures while dealing with static charges?
13. Lightning is very dangerous.We should not take the following safety precautions against lighting.
14. What is the process by which certain objects acquire a charge by gaining or losing electrons?
Friction is the process by which certain objects acquire a charge by gaining or losing electrons through rubbing against another object.
15. What type of charge does an electron carry?
An electron carries a negative charge.
16. Which type of material allows electrons to move easily and is a good conductor of electricity?
Metal is a good conductor of electricity as it allows electrons to move easily through it.
17. What happens when two objects with opposite charges are brought close together?
Objects with opposite charges attract each other, while objects with similar charges repel each other.
18. What happens when you rub a balloon against your hair and then place it near a wall?
Rubbing the balloon against your hair creates static electricity, causing the balloon to stick to the wall due to attraction.
19. Which of the following is NOT a way to transfer static electricity?
Radiation is not a method of transferring static electricity; the other options are valid ways to transfer static charge.
20. What is the transfer of electrons that occurs when a charged object is brought near but not touched to a neutral object?
Induction is the transfer of electrons that occurs when a charged object is brought near but not touched to a neutral object, causing a temporary separation of charges.
21. Which type of material does NOT allow electrons to move easily and is a poor conductor of electricity?
Glass is a poor conductor of electricity as it does not allow electrons to move easily through it.
22. What happens when two objects with the same charge are brought close together?
Objects with the same charge repel each other, while objects with opposite charges attract each other.
23. What happens when you touch a metal doorknob after shuffling your feet on a carpet?
Shuffling your feet on a carpet creates static electricity, which discharges when you touch a metal object like a doorknob, causing a shock.
24. Which material is a good conductor of electricity?
Copper is a good conductor of electricity because it allows electric charges to flow through it easily.
25. What is the process of transferring electrons from one object to another by rubbing known as?
Static electricity is the buildup of electric charge on the surface of an object.
26. What happens when two objects with opposite charges are brought close together?
Objects with opposite charges attract each other due to the imbalance in electric charges.
27. What is the SI unit of electric charge?
The SI unit of electric charge is the coulomb, named after the French physicist Charles-Augustin de Coulomb.
28. Which of the following can become positively charged by losing electrons?
A glass rod can become positively charged by losing electrons, resulting in an excess of positive charge.
29. What is used to measure the electric potential difference between two points in a circuit?
A voltmeter is used to measure the electric potential difference in volts between two points in a circuit.
30. Which of the following is NOT a method of eliminating static electricity?
Rubbing is a method that can actually create static electricity by transferring electrons from one object to another.
31. Which type of charge does an object have if it gains electrons?
An object gains electrons when it becomes negatively charged, as electrons are negatively charged particles.
32. What is the property of an object that indicates whether it is positively or negatively charged?
The property that indicates whether an object is positively or negatively charged is its electric charge.
33. Which of the following is a common example of static electricity in everyday life?
Lightning is a natural example of static electricity where electrical discharge occurs between clouds or between clouds and the ground.
34. What happens when two objects with the same charge are brought close together?
Objects with the same charge repel each other because like charges repel due to the electrostatic force.
35. Which of the following is a negatively charged subatomic particle?
Electrons are negatively charged subatomic particles that orbit the nucleus of an atom.
36. What property of an object determines the strength of the electric force between two objects?
The electric force between two objects is determined by the amount and type of charge each object possesses.
37. Which of the following is an example of a material that is an insulator?
Rubber is an insulator because it does not allow electric charges to flow through it easily, unlike metals which are conductors.
38. What is the process of neutralizing a charged object by adding or removing electrons called?
Discharging involves neutralizing a charged object to return it to a neutral state by adding or removing electrons.
39. Which of the following devices is commonly used to demonstrate static electricity by producing sparks?
A Van de Graaff generator is a device used to accumulate and store static electricity, often producing visible sparks.
40. What do opposite charges do when they are brought close together?
Opposite charges attract each other due to the electrostatic force, forming an electric field between them.
41. Which of the following is a common source of static electricity in households?
Carpets are a common source of static electricity in households due to the friction between shoes and the carpet fibers.
42. What is the charge of an object that has an equal number of protons and electrons?
An object with an equal number of protons and electrons is neutrally charged, meaning it has no net charge.
43. Which of the following is NOT a factor that affects the strength of static electricity?
Temperature does not significantly affect the strength of static electricity, unlike factors such as distance, material, and humidity.
44. What happens to the electric charge of an object when it gains electrons?
An object gains negative charge when it gains electrons, leading to an imbalance of charge and a negative overall charge.
45. Which of the following objects is commonly used to demonstrate static cling?
Balloons are commonly used to demonstrate static cling as they can be charged by rubbing and attract small objects like paper bits.
46. What is the process of transferring charge between an object and the earth called?
Earthing involves transferring charge between an object and the earth to neutralize the object and prevent static buildup.
47. What type of material is often used in clothing to prevent static electricity buildup?
Cotton is often used in clothing to prevent static electricity buildup as it is a natural fiber that does not create as much static charge.
48. What is the term for the ability of an object to hold an electric charge called?
Capacitance is the property of an object that allows it to store electric charge, typically in a capacitor.
49. Which of the following is a common way to discharge static electricity from your body?
Touching a metal doorknob allows the excess static charge on your body to flow to the doorknob and neutralize, reducing the static buildup.