The document outlines a summative assessment for a Grade 8 Physics class, covering energy, electricity, and magnetism with a total of 45 marks and a 2-hour completion time. It includes various types of questions, ranging from multiple-choice to descriptive answers, along with specific instructions for each question type. Topics addressed in the questions include electric charge, renewable vs non-renewable energy sources, and atomic structure.

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Summative Assessment – Semester II
Physics
Class: 8 Max Mks: 45
Time: 2 hrs
Chapters included are
1. More about Energy
2. Static Electricity
3. Magnetism and Electricity
General Instructions:
All questions are compulsory
Questions 1 to 5 are multiple-choice questions and carry 1 mark each. Choose the appropriate option
and write the answer in the answer sheet.
Question 6 to 10 carry 1 mark each and must be answered in 1 or 2 sentences.
Questions 11 to 19 carry 2 marks each must be answered in 2 or 3 sentences.
Questions 20 to 23 carry 3 marks each and must be answered in 5 or 6 sentences.
Question 24 carries 5 marks and must be answered in 7 or 8 sentences.
1. A positively charged body has:
(a) Excess of electrons
(b) Deficiency of electrons
(c) No change in number of electrons
(d) None of these
2. The kind of energy present in fossil fuels is:
(a) Heat energy
(b) Mechanical energy
(c) Chemical energy
(d) Geothermal energy
3. The device that converts solar energy to electric energy is:
(a) Solar cooker
(b) Solar furnace
(c) Solar cell
(d) Solar water heater

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4. The strength of magnetic field in a solenoid will be maximum, if it has:
(a) 100 turns
(b) 75 turns
(c) 5 turns
(d) 20 turns
5. An electric device to stabilize voltage is:
(a) Dynamo
(b) Transformer
(c) Voltmeter
(d) Ammeter
6. A G.L.E can be charged _____________ by touching a charged glass rod with its cap.
7. What is meant by non-renewable source of energy?
8. What is slurry?
9. The ___________ of steam is used to drive turbines in thermoelectric stations.
10. What do you understand by the term induced current?
11. State two ways by which you can increase the strength of an electromagnet.
12. Name four insulators.
13. Describe an experiment to show that like charges repel each other.
14. Statements given below are incorrect write the correct statements.
(i) Wind mills are popular in India since the 17th
century.
(ii) A _____________ is employed in electric bell.
15. Name the following:
(i) The space around a magnet where its influence can be felt is called _____________.
(ii) The pollutant in air responsible for acid rain is ____________.
16. State two ways of reducing air pollution caused by automobiles.

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17. Draw a neat labeled diagram of gold leaf electroscope.
18. Draw a neat labeled diagram of an electric bell.
19. Why do we prefer biogas, to burning dry biomass?
20. How is nuclear energy released by the fission process? How is this energy converted into
electric energy?
21. How can you use gold leaf electroscope to detect the charge on a body?
22. (a) Why are the contact points of electric bell made of silver-cadmium alloy?
(b) How can you alter the frequency of the ring of the electric bell?
23. Give three characteristics of magnetic field set up by a coil carrying current.
24. Briefly describe Rutherford’s structure of atom.