FA-3 PHYSICAL SCIENCE CLASS 10

CLASS-10

MODEL PAPER - 1

FORMATIVE ASSESSMENT - 3

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I. Choose the correct answer. 5x1 = 5M

1. 1 volt = ……………..

A. 1 joule/coulomb B. 1 joule/second

C. 1 ohm-meter D. 1 coulomb/second 

2. Best electric conductor 

A. Copper B. Silver 

C. Gold D. Aluminium 

3. ……… is used to prevent overload in household circuits. 

A. Mains B. Filament

C. Fuse D. Resistor 

4. Identify the Ore that can be concentrated in froth floatation. 

A. Rock salt B. Horn silver

C. Magnesite D. Galena 

5. The process of heating the Ore in the presence of air 

A. Smelting B. Roasting 

C. Calcination D. Refining 

II. Fill in the blanks. 5x1 = 5M

6. The ordered motion of electrons is called …………………..………………….

7. Ammeter should be connected in ……………….. combination in the circuits. 

8. Symbol of Resistance …………………………………………………………….

9. Number of water molecules present in Epsom salt is …………………………

10. ………………………….………………. Is the chemical name of rust of Iron.

III. Answer the following questions. 3x2 = 6M

11. How do metals occur in nature? Give examples to any two types of minerals. 

12. Define the term gangue. What is the common gangue resent in ores?

13. Why do we consider tungsten as a suitable material for making the filament of a bulb?

IV. Answer the following question. 1x4 = 4M

14. (A) A house has 3 tube lights, two fans and a television. Each tube light draws 40W. The fan  draws 80W and the television draws 60W. On the average, all the tube lights are kept on  for five hours, two fans for 12 hours and television for five hours every day. Find the cost of electric energy used in 30 days at the rate of Rs. 3.00 per KWH. 

(OR)

 (B) Suggest an experiment to prove that the presence of air and water are essential for  corrosion. Explain the procedure.