Which of the following cannot be charged easily by friction?
- A plastic scale
- A copper rod
- An inflated balloon
- A woollen cloth.
The Correct Option is B
Solution and Explanation
Because copper rod is a conductor, friction cannot readily charge it. Friction alone can readily charge non-conducting materials.
The correct option is (B): A copper rod
Top Questions on Charging by Rubbing
Questions Asked in CBSE Class VIII exam
- Draw a pie chart showing the following information. The table shows the colours preferred by a group of people.
Colours Number of people Blue 18 Green 9 Red 6 Yellow 3 Total 36 - CBSE Class VIII
- Circle Graph or Pie Chart
- When he felt the earthquake, do you think Ignesious immediately worried about a tsunami? Give reasons for your answer. Which sentence in the text tells you that the Ignesious family did not have any time to discuss and plan their course of action after the tsunami struck?
- CBSE Class VIII
- The Tsunami
Mention the following.
(i) Two examples of social practices prevailing then.
(ii) Two oppressive policies of the British.
(iii) Two ways in which common people suffered.
(iv) Four reasons for the discontent that led to the 1857 War of Independence.
- CBSE Class VIII
- Glimpses of the past
- Subtract 3xy + 5yz – 7zx from 5xy – 2yz – 2zx + 10xyz
- CBSE Class VIII
- Addition and Subtraction of Algebraic Expressions
- Factorise the following expressions.
- \(a^ 2 + 8a + 16 \)
- \(p^ 2 - 10p + 25 \)
- \(25m^2 + 30m + 9 \)
- \(49y^ 2 + 84yz + 36z ^2 \)
- \(4x^ 2 - 8x + 4 \)
- \(121b ^2 - 88bc + 16c ^2 \)
- \((l + m) ^2 - 4lm \) (Hint: Expand \((l + m) ^2 \) first)
- \(a^ 4 + 2a ^2b ^2 + b^ 4\)
- CBSE Class VIII
- What is Factorisation?
Concepts Used:
Electric Charge
What is Electric Charge
It is the property of subatomic particles that experiences a force when put in an electric and magnetic field. It is are of two types: Positive and Negative. It commonly carried by charge carriers protons and electrons.
Properties of Electric Charge
Various properties of charge include the following :-
- Additivity of Electric Charge
- Conservation of Electric Charge
- Quantization of Electric Charge
Types of electric charge
Two kinds of electric charges are there :-
Negative Charge - When an object has a negative charge it means that it has more electrons than protons.
Positive Charge - When an object has a positive charge it means that it has more protons than electrons.
When there is an identical number of positive and negative charges, the negative and positive charges would cancel out each other and the object would become neutral.