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ANSWER SHEET Subject Physics Name _________________________ Grade and Section _____________R. No ____________ R.NO Answer, True Or false R.NO Answer Choose R.NO Answer Choose R.NO Answer Choose 1 9 18 27 2 10 19 28 3 11 20 29 4 12 21 30 5 13 22 31 6 14 23 32 Choose 15 24 33 7 16 25 34 8 17 26 35

MekanisaDebre Genet St, Michael Cathedral primary &secondary School 2016 E.C 2nd semester physics Final exam for Grade 10 Email: -Mekanisa St Michael 12@ Ethio net. com Full Name _______________________________Grade ______ Section ___________ No___ Subject: - PHYSICS Academic Year 2014E.C. Prepared by:- Mr. S.H Time allowed 60min Part One: For questions 1 to 6write TRUE if the stamen is correct and FALSE if it is not correct. Each question contains one mark. Full wave rectification is the conversion of both AC wave forms into DC wave forms by using diode bridge circuit. Electromagnetic waves are waves that travel through vacuum. Refracted ray bends away from the normal when light passes from denser medium to rarer/lighter medium. Collector is the heavily doped region to supply charge carriers to the collector via the Convex mirror-a mirror which converges light rays reflecting from it. Part Two: For questions 6 to 26 choose the correct answer and write the letter of your choice on the space provided on answer sheet. Each question contains one mark. a long solenoid has 1000 turns uniformly distributed over a length of 0.40. what current is required in the windings to produce a magnetic field of magnitude π ×10-4T at the center of the solenoid? ( μ0= 4π×10-7Tm/A) A. 0.01A B. 1.0A C. 0.1A D. 10A A pin stands erect 10cm from a converging mirror of focal length 20cm. how far apart are the pin and image. 10cm B. 30cm C. 20cm D. 7cm C F All electromagnetic waves travel with the same speed in A. air B. vacuum C. mirror D. water An object is 25 cm in front of a converging mirror of focal length 10cm. the image is A. real and the same size as the object B. real and larger than the object C. real and smaller than the object D. virtual and smaller than the object A certain wave is characterized by the wavelength , frequency f and wave speed v. as this wave travels from one medium to another one, it gets refracted. Which of these characteristics of the wave are changed due to refraction? A. ,f& v B. &v C. f & v D. & f What is the basic difference between mechanical and electromagnetic waves? A. mechanical waves are longitudinal waves while electromagnetic waves are transversal B. mechanical waves travel in one direction while electromagnetic waves do in all directions C. mechanical waves are compressions while electromagnetic waves are rarefactions D. mechanical waves require material medium while electromagnetic waves do not Which one of the following statements describes a convex mirror correctly? A. parallel rays of light diverge when reflected from the mirror B. rays along the radius of the mirror converge to its principal focus C. the principal focus is on the center of curvature of the mirror D. the radius of curvature of the mirror is on the reflecting side