IB DP Physics Mock Exam HL Paper 1A Set 3 - 2025 Syllabus
IB DP Physics Mock Exam HL Paper 1A Set 3
Prepare for the IB DP Physics Mock Exam HL Paper 1A Set 3 with our comprehensive mock exam set 3. Test your knowledge and understanding of key concepts with challenging questions covering all essential topics. Identify areas for improvement and boost your confidence for the real exam
Question
Two blocks of equal mass are connected by a light string that passes over a frictionless pulley. The blocks slide at a constant velocity on inclined planes that are at right angles to each other. One of the inclined planes makes an angle 
to the horizontal such that < 45°.
Which of the following statements is correct?
A. The net force acting on each block is the same.
B. The weight force acting on each block is different.
C. The magnitude of the normal force acting on each block is the same.
D. The magnitude of the force exerted by the string on each block is different
▶️Answer/Explanation
Ans A
Question
Three statements about the Carnot cycle are:
I. The Carnot cycle is reversible.
II. The net entropy change of the surroundings of the gas over one cycle is positive.
III. Heat transfer takes place in only two stages of the cycle
Which statements are correct?
A. I and II
B. I and III
C. II and III
D. I, II and III
▶️Answer/Explanation
Ans:B
Question
Unpolarized light is incident on two polarizers X and Y. The transmission axis of X is vertical and that of Y is horizontal.
Polarizer Z can be placed
I. before polarizer X.
II. between polarizer X and Y.
III. after polarizer Y.
The transmission axis of Z makes an angle of 45° with those of X and Y. At which positions for Z will no light be transmitted?
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
▶️Answer/Explanation
Ans B