Sample Question Paper Year 2011
CBSE Class IX
Subject: Physics & Chemistry
Time: 2 Hrs
MM: 60
Question.1 Why do we hear sound of approaching aero plane
before it reaches us? (1x3)
Question.2 If an electric bulb of 60w lighted for 10 hrs. How much is the
electric energy consumed in joules?
Question.3 How many electrons are present in P3-?
Question.4 The speed of an arrow shouted from the bow is square root of
its Kinetic Energy. What is the mass of an arrow? (2x7)
Question.5 A girl vibrates her scale 20 cycles per minute. What is the
time period of wave?
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