CBSE Worksheet for Chapter - 5 Electricity Class 8

CBSE Worksheet for Chapter - 5 Electricity Class 8

Worksheets For class 8

Find CBSE Worksheet for chapter-5 Electricity class 8

1. CLASS-8
2. BOARD: CBSE
3. PHYSICS Worksheet - 5
4. TOPIC: Electricity
5. For other CBSE Worksheet for class 8 Science check out main page of Physics Wallah.

SUMMARY

• Electricity, Electric charge – types of charge, Properties, Units, flow of charge, Earthing
• Conductors, Insulators, Semi- conductors
• Electric current, Electric circuit, Electric conductivity
• Chemical effect of electric current
• Danger of electricity and Safety measures

SECTION 1 – OBJECTIVE

1. When a glass rod is rubbed with silk, it acquires a positive charge because:
   1. Electrons are added to it
   2. Protons are added to it
   3. Protons are removed from it
   4. Electrons are removed from it
2. When two bodies are charged together by rubbing each other then both of them acquire:
   1. Unequal charges
   2. Equal charges
   3. Unequal and opposite charges
   4. None of the above
3. Silicon is a:
   1. Conductor
   2. Insulator
   3. Semi-conductor
   4. Super- conductor
4. Materials which allow larger current to flow through them are called:
   1. Insulators
   2. Semi-conductors
   3. Alloys
   4. Conductors
5. On increasing temperature semiconductor behaves as:
   1. Conductor
   2. Insulator
   3. Both A and B
   4. None of the above
6. Which of the following is a conductor?
   1. Vacuum
   2. Copper
   3. Mica
   4. Pure water
7. Earthing protects us from:
   1. Electrical shocks
   2. Chemical shocks
   3. Magnetic shocks
   4. None of these
8. If I is the current through a wire and e is the charge of electron, then the number of electrons in t second will be given by:
   1. Ie/t
   2. lte
   3. e/lt
   4. lt/e
9. Conventionally the direction of the current is taken as:
   1. The direction of flow of negative charge
   2. The direction of flow of atoms
   3. The direction of flow of molecules
   4. The direction of flow of positive charge
10. If 10C charge flows through a conductor in 2s then the value of the current flowing through the conductor is:
    1. 5A
    2. 2A
    3. 3A
    4. 1A
11. Electrical potential is measured by:
    1. Voltmeter
    2. ammeter
    3. Galvanometer
    4. cell
12. In an electrolytic cell, the electrode that is connected to the positive terminal of the battery is called:
    1. Cation
    2. Cathode
    3. Anion
    4. Anode
13. Electroplating is a method of:
    1. Making plates using electricity
    2. Plating a metal with another metal
    3. Coating any object with an electrically conducting plate
    4. Coating any object with an electrically conducting
14. Electric bell works on the principle of:
    1. Chemical effect of current
    2. Magnetic effect of current
    3. Heating effect of current
    4. All of the above
15. Iron objects are generally electroplated with:
    1. (A) Gold
    2. (B) silver
    3. (C) chromium
    4. (D) mercury

SECTION 2 – SUBJECTIVE

1. What are the two types of electric charges ? Give some important properties of electric charges.
2. What do you mean by earthing ?
3. What are cations and anions? Give an example of each.
4. Write any 3 safety measures in using electricity.
5. What is electroplating ? Mention three examples of electroplating.

Solutions: to worksheet-5 Topic- Electricity

objective