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HOLY CHILD SCHOOL, KALNA MOCK TEST CLASS:-X Sub: Physics Total: 80 Time: General Instructions (i) This question paper is divided into two sections. (ii) Section A is compulsory (iii) Attempt any four questions in Section B. (iv) The intended marks for questions or parts of questions are given in brackets [ ]. [Section A] Attempt all questions: Question: 1 (a) Which physical quantity does the electron volt measure? How is it related to the SI unit of this quantity? [2] (b) What should the angle between force and displacement be to get the (i) Minimum work and (ii) Maximum work? [2] (c) By drawing a diagram, give an example of a body where CG lies outside the body? [2] (d) The work done by the heart is 1 joule per beat. Calculate the power of the heart if it beats 72 times in one minute. [2] (e) Two men A and B climb through the same height. Neglecting friction of the earth compare the work done by them. [2] Question: 2 (a) (a) Why does ice at 0 C feels colder than water at 0 C? [2] (b) How do the characteristics of musical note change when amplitude of a note decreases and wavelength of a note decreases? [2] (c) Draw a fully labelled and neat diagram for the verification of Ohm s law by voltmeterammeter method. [4] (d) An electric of power 750W, operates at 250V. Calculate the inductive resistance. [2] Question: 3 (a) State two practical uses of echoes. (b) Why ice at 0 C feels more colder than water at 0 C? (c) 100 g of water at 20 C is supplied 16800 J of heat energy. If specific heat capacity of water is 4.2 Jg-1 C-1, calculate the final temperature of water. (d) How is the critical angle related to the refractive index of a medium? [2] [2] [2] [2]
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