Physics Exam Questions - Grade 12 ESSLCE 2023

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.

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.

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!