Questions and Answers
Which of the following is not a fundamental unit?
The dimensions of kinetic energy are the same as that of force.
False
What defines derived quantities in physics?
Derived quantities are those physical quantities that are calculated from fundamental units through mathematical operations.
As per recent understanding, light consists of ______.
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What is the critical angle for commonly used glass with a refractive index of 1.5?
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State the significant figures of the number 0.001257.
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Match the following physical quantities with their dimensions:
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The equation $S = ut + at^2$ is dimensionally correct.
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The ray diagram for a convex mirror shows that the focal length is ______.
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What are the requirements of good units?
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Study Notes
Unit Test Overview
- D.B.F.Dayanand College of Arts and Science, Solapur, conducted Unit Test-I for the academic year 2024-25.
- Test covers subjects including Arts, Science, and M.C.V.C.
- Duration: 1 hour, Maximum Marks: 25 for Physics (Subject Code: 54).
Instructions for Students
- Use of logarithmic tables is permitted.
- Each section of the exam should be written on a new page.
- Diagrams must be included wherever necessary.
- Symbols and units are to be understood as per standard meanings, unless specified otherwise.
- Marks for each question are indicated on the right.
Section A
Multiple Choice Questions (1 mark each)
- Identify the non-fundamental unit from the options:
- a) Candela
- b) Steradian
- c) Mole
- d) Coulomb
- Recognize that dimensions of Kinetic Energy are equivalent to:
- a) Force
- b) Acceleration
- c) Work
- d) Pressure
- Recent insights suggest that light consists of:
- a) Rays
- b) Waves
- c) Corpuscles
- d) Photons obeying wave rules
- Determine the critical angle for glass with a refractive index of 1.5:
- a) 49°
- b) 42°
- c) 45°
- d) 46°
Short Answer Questions (1 mark each)
- Definition of derived quantities of a physical quantity.
- Significant figures of:
- a) 0.001257
- b) 9.1 × 10^n (confirm 'n' if given)
- Definition of the focal power of spherical mirrors.
Section B
Attempt any Four Questions (2 marks each)
-
Write the dimensional formula for:
- Momentum
- Angle
-
Verify the correctness of the equation ( S = ut + \frac{1}{2}at^2 ) through dimensional analysis.
-
Determine the order of magnitude for:
- ( 6.4 × 10^n , (\text{m}) )
- ( 1.6 × 10^m , (C) )
-
List the requirements of good units.
-
Create a ray diagram depicting a convex mirror with a positive focal length.
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Description
Prepare for your XI Science Physics unit test with this quiz. This assessment covers various topics aligned with the curriculum for the 2024-25 academic year. Make sure to refresh your knowledge and practice using logarithmic tables as permitted.
