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.

49. A wooden block of volume 5.00 x 10⁴ m³ floats partially submerged in water, and a small steel object of mass m is placed on top of the block. When m = 0.25 kg, the system is in equilibrium and the top of the wooden block is at the level of the water. What is the density of the wood?

1000 kg.m^-3
1500 kg.m^-3
500 kg.m^-3
800 kg.m^-3

50. A bimetallic strip made up of iron and brass bonded together is used in a thermostat. The coefficient of linear expansions for iron and brass are 1.1 x 10^-5/K and 1.9 x 10^-5/K, respectively. Which of one the following phenomena occurs when the temperature changes?

When the temperature decreases, the brass section of the bimetallic strip contracts slowly than the iron and the strip bends towards the brass section.
When the temperature increases, the iron section of the bimetallic strip expands faster than the brass and the strip bends towards the brass section.
When the temperature increases, the brass section of the bimetallic strip expands faster than the iron and the strip bends towards the iron section.
When the temperature decreases, the iron section of the bimetallic strip contracts faster than the brass and the strip bends towards the iron section.

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!

49. A wooden block of volume 5.00 x 104 m3 floats partially submerged in water, and a small steel object of mass m is placed on top of the block. When m = 0.25 kg, the system is in equilibrium and the top of the wooden block is at the level of the water. What is the density of the wood?

50. A bimetallic strip made up of iron and brass bonded together is used in a thermostat. The coefficient of linear expansions for iron and brass are 1.1 x 10-5/K and 1.9 x 10-5/K, respectively. Which of one the following phenomena occurs when the temperature changes?

49. A wooden block of volume 5.00 x 10⁴ m³ floats partially submerged in water, and a small steel object of mass m is placed on top of the block. When m = 0.25 kg, the system is in equilibrium and the top of the wooden block is at the level of the water. What is the density of the wood?

50. A bimetallic strip made up of iron and brass bonded together is used in a thermostat. The coefficient of linear expansions for iron and brass are 1.1 x 10^-5/K and 1.9 x 10^-5/K, respectively. Which of one the following phenomena occurs when the temperature changes?