Biology 2015 E.C - 2023 G.C 2014 E.C - 2022 G.C Chemistry 2015 E.C - 2023 G.C Civics and Ethical Education 2015 E.C - 2023 G.C English 2015 E.C - 2023 G.C Geography 2015 E.C - 2023 G.C History 2015 E.C - 2023 G.C Physics 2015 E.C - 2023 G.C Physics - Grade 12 -2023 G.C Grade 12 students can now access their exam results by visiting the Educational Assessment and Examination Services (EAES) website. Previous1234567891011Next 9. In a simple a.c circuit, an inductor of 4µH and a capacitor of 9 pF are connected in series to each other and the combination is connected to an a.c source. What is the angular frequency at resonance of the circuit? 1.67x108 rad/s 3.6x107 rad/s 2.7x105 rad/s 3.8x108 rad/s 10. Electrons in a Sodium atom emit radiation when they move from a higher energy level of -0.81eV to a lower energy level of -2.21eV. What is the frequency of radiation emitted in the process? 2.21x1014 Hz 8.10x1015 Hz 1.40x1015 Hz 3.38x1014 Hz 11. Which one of the following statements is NOT correct about power of a lens? The power of a lens decreases as the focal length of the lens increases. The larger the focal length of the lens the greater is the power of the lens. The power of a lens is the measure of the strength of the lens. Optician gives the name diopters for the unit of power of a lens. 12. Which one of the following groups of physical quantities contains only vectors? Work, Electric field, Displacement and Force Acceleration, Speed, Force and Electric field Momentum, Energy, Magnetic field and Force Displacement, Velocity, Magnetic field and Momentum 13. Which rule about the number of significant figures is correct? Zeros in the number 450.0 are significant figures. 0.0023 are significant figures. 1.1000 are not significant figures. 2.70018 are not significant figures. Previous1234567891011Next We have provided these questions from previous years grade 12 Ethiopian Secondary School Leaving Certificate Examination (ESSLCE) exams with the sole purpose of assisting students in their studies and preparations for upcoming exams. Please be aware that these questions are not indicative of future exam content. Good luck with your studies!