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MOUNT CARMEL SCHOOL BAIJNATH PRE-BOARD EXAMINATION(2021-2022) CLASS-X PHYSICS TIME:1.5Hrs SECTION-A(ALL QUESTIONS ARE COMPULSORY) Question:1 Choose the correct answer from the given option : 1) Which one has more heat energy at 0o Celsius-1g ice or 1 g water? a) 1 g ice b) 1 g water c) Both have same heat energy d) 1 g ice has no heat enegy, 1 g water has 80 calorie heat energy. M.M.40 (10*1=10) 2) Which characteristic of sound distinguishes different sound having same pitch and quality? a) Intensity b) Loudness c) Frequency d) Amplitude 3) Radioactive sources emit three types of radiations. Which radiation has zero mass? a) Alpha radiation b) Beta radiation c) Gamma radiation d) All of these 4) Amount of heat energy required to melt 5 kg of ice at 00 celsius is (specific latent heat of ice=336J g-1 a) 1680000 J b) 1680 J c) 168*103 d) 168 KJ 5) Current is flowing in a circular loop.which of the following statement is incorrect? a) Looking at the face of the loop if the current flows in anti clockwise direction then that face has south polarity.If the current flows in the clockwise direction then that face has north polarity. b) Near the centre of the loop the magnetic field lines are nearly parallel. c) Magnetic field lines become denser if the current in the loop is increased. d) At the centre the magnetic field lines are along the axis of the loop and normal to the plane of the loop. 6) Which of the following electromagnets will be a stronger one
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