Physics - Static Electricity - Quiz, Flashcards & Trivia

1. When polythene is rubbed with a duster, _______ move from the duster to the polythene leaving the polythene negatively charged and the duster positively charged.

Photons

Protons

(1) electrons(2) duster(3) polythene(4) polythene(5) duster

Neutrons

When two materials are rubbed together, electrons are transferred from one material to the other, resulting in one material becoming negatively charged (gaining electrons) and the other becoming positively charged (losing electrons).

Explanation

When two materials are rubbed together, electrons are transferred from one material to the other, resulting in one material becoming negatively charged (gaining electrons) and the other becoming positively charged (losing electrons).

2. If two charged objects are brought together with the same type of charge, what will happen?

They will have no interaction.

They will attract.

They will repel.

Their charges will neutralize each other.

When two charged objects have the same type of charge, they will repel each other due to the principle of like charges repel.

Explanation

When two charged objects have the same type of charge, they will repel each other due to the principle of like charges repel.

3. Attraction and Repulsion: If two charged objects are brought together with the opposite type of charge, what will happen?

The charges will cancel each other out.

Nothing will happen.

They will attract.

They will repel.

Opposite charges attract each other due to the electrostatic force of attraction between them.

Explanation

Opposite charges attract each other due to the electrostatic force of attraction between them.

4. When two charged objects are brought together with one charged and the other not, what will happen?

They will explode.

They will remain stationary.

They will attract.

They will repel.

Charged objects with opposite charges will attract each other due to the electrostatic force. This force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

Explanation

Charged objects with opposite charges will attract each other due to the electrostatic force. This force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

5. What are the 4 steps involved in photocopying?

2. Scan the document into a computer program.

1. Select the document on the photocopier and press 'Start'.

3. Use a pencil to trace the document onto a separate sheet of paper.

1. The image of the document is projected onto a positively charged copying plate.2. Where the light falls onto the plate, the electrical charge leaks away.3. Negatively charged black toner particles are attracted to the remaining positive areas.4. Paper is placed over the copying plate, toner is transferred to the paper and heated to make it stick.

The correct steps for photocopying involve a process with a copying plate, toner, and paper, not just scanning or hand-tracing the document.

Explanation

The correct steps for photocopying involve a process with a copying plate, toner, and paper, not just scanning or hand-tracing the document.

6. How can you help prevent explosions at petrol stations?

Smoking at the fueling station.

Regularly lighting matches near the fuel pumps.

Grounding or earthing devices.

Using cell phones while refueling.

Grounding or earthing devices help prevent the buildup of static electricity, reducing the risk of sparks that could lead to explosions at petrol stations. Regularly lighting matches, using cell phones, and smoking at the fueling station all pose significant dangers of igniting flammable fuels.

Explanation

Grounding or earthing devices help prevent the buildup of static electricity, reducing the risk of sparks that could lead to explosions at petrol stations. Regularly lighting matches, using cell phones, and smoking at the fueling station all pose significant dangers of igniting flammable fuels.