RAJUK Uttara Model College HSC Physics 1st Paper MCQ 2025 with Solution

This expert guide provides a comprehensive breakdown of the RAJUK Uttara Model College (RUMC) Physics 1st Paper MCQ for 2025. RUMC is known for academic excellence, and their test patterns frequently mirror those of the actual Dhaka Board exams. This analysis focuses on helping students understand the core concepts behind the questions.

Detailed MCQ Solutions and Logical Explanations

Measurements and Errors

• Question 1: What is the term for the apparent change in an object’s position due to a change in the direction of sight?

• Answer: Parallax Error.
  • Expert Insight: This error occurs when the observer’s eye is not positioned perpendicularly to the scale. To avoid this, always look directly at the measurement point.
• Question 2: If there is a 3% error in measuring the diameter of a sphere, what is the resulting percentage error in its volume?

• Solution: Because the volume of a sphere is proportional to the cube of its radius or diameter, the percentage error in volume is three times the error in the diameter.
  • Result: 9%.

Vector Analysis

• Question 3: What is true if Divergence is negative?

• Answer: The density of the fluid increases.
  • Logic: Negative divergence indicates a “sink” where more fluid enters a specific point than leaves it, causing the density to rise.
• Question 4: What is the angle between the vectors (i – j) and (j + k)?

• Fast-Track Solution: By applying the dot product formula, we determine the cosine of the angle between these two vectors.
  • Result: 120 degrees.

Dynamics and Newtonian Mechanics

• Question 8 (Case Study): A block with a mass of 10 kg sits on a floor with a friction coefficient of 0.20. If a horizontal force of 9.6 N is applied, what is the resulting friction force?

• The Pitfall: Many students mistakenly calculate the maximum possible friction and assume that is the answer.
  • The Reality: Since the applied force of 9.6 N is lower than the maximum static friction threshold, the block remains stationary. In this state, the static friction force perfectly balances and equals the applied force.
  • Answer: 9.6 N.

Quick Answer Key and Topic Map

High-Performance Preparation Checklist

To maximize your score in the Physics MCQ section, follow these strategies used by top students:

• Dimensional Analysis: Frequently verify the units of your answers. For instance, ensure the dimensions of Torque are correct.
• Calculator Mastery: Practice performing vector operations and equations on your calculator to save time during the 25-minute exam.
• Constant Values: Memorize essential constants like the gravitational constant and understand how gravity behaves at the Earth’s center.
• Graph Recognition: Be prepared to identify common physics graphs, such as the parabolic relationship in spring potential energy.

RAJUK Uttara Model College HSC Physics 1st Paper MCQ 2025 Question

RAJUK Uttara Model College HSC Physics 1st Paper MCQ 2025 Solution

Why RUMC Questions are Essential for HSC 2025

The exam questions from RAJUK Uttara Model College are built to challenge both your conceptual depth and calculation speed. These questions often reappear in board exams with only slight variations. Mastering this paper prepares you for the high difficulty level expected in the 2025 finals.

Common Mistake Alert: In Question 19, if the length of a simple pendulum is doubled, the time period does not double; it increases by approximately 41.4% because the time period is proportional to the square root of the length.

Authoritative Resources for Candidates

For official updates and further study materials, visit these sources:

• National Curriculum and Textbook Board (NCTB): nctb.gov.bd
• Teachingbd24.com: For additional college solutions and suggestions.