Diploma Semester 2 Physics GTU Exam Guide

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Questions and Answers

What is the formula for calculating the Least Count of a micrometer screw gauge?

LC = Pitch / Number of divisions on the circular scale

Explain Coulomb's Law in your own words.

Coulomb's Law states that the force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

List the SI unit for measuring electric current.

The SI unit for measuring electric current is ampere (A).

In the micrometer screw gauge, why is it important to draw accurate diagrams?

Accurate diagrams help in understanding the structure and functioning of the micrometer screw gauge, which is vital for effective communication of ideas in physics. Signup and view all the answers

What are the two key components of Coulomb's Law?

The two key components are the product of the charges and the distance squared between them. Signup and view all the answers

How can understanding SI units and their symbols benefit a physics student?

Understanding SI units and their symbols allows students to accurately interpret and solve problems involving measurements in physics. Signup and view all the answers

What is the significance of the micrometer screw gauge in measurement?

The micrometer screw gauge is significant as it provides precise measurements of small dimensions, which is crucial in experiments and applications. Signup and view all the answers

Why should students study consistently throughout the semester instead of last-minute?

Consistent study helps students understand concepts better and reduces stress, increasing the likelihood of achieving higher scores in examinations. Signup and view all the answers

What is the formula for the electric field constant in a vacuum?

The formula for the electric field constant in a vacuum is <code>k = 1 / 4πε₀</code>. Signup and view all the answers

Describe the difference between series and parallel capacitor combinations.

In a series combination, the formula is <code>1/C = 1/C1 + 1/C2 + 1/C3</code>, while in a parallel combination, it is <code>C = C1 + C2 + C3</code>. Signup and view all the answers

What is thermal conductivity and why is it important?

Thermal conductivity is a material's ability to conduct or transfer heat, and it is important in determining how materials respond to thermal energy. Signup and view all the answers

Explain conduction and provide an example.

Conduction is the transfer of heat through direct contact, such as a metal spoon getting hot in a pot of boiling water. Signup and view all the answers

What is Snell's Law and its significance?

Snell's Law states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, known as the refractive index. Signup and view all the answers

What units are used to measure specific heat capacity?

Specific heat capacity is measured in Joules per gram per degree Celsius (J/g°C). Signup and view all the answers

Differentiate between transverse and longitudinal waves.

Transverse waves oscillate perpendicular to the direction of wave travel, while longitudinal waves oscillate parallel to the wave direction. Signup and view all the answers

What is ultrasonic wave and where is it commonly used?

Ultrasonic waves are sound waves with frequencies above the audible range (20 kHz), and they are commonly used in medical imaging and industrial applications like sonar. Signup and view all the answers

Explain total internal reflection and its application.

Total internal reflection occurs when a light wave hits a boundary at a steep angle, causing it to reflect entirely within a medium, which is utilized in fiber optic cables for efficient light transmission. Signup and view all the answers

What does the symbol 'C' represent in relation to capacitors?

The symbol 'C' represents capacitance, which measures a capacitor's ability to store electrical charge. Signup and view all the answers

Study Notes

Diploma Semester 2 Physics

GTU examination, subject code 43005, 30 crucial questions are outlined for successful passing with at least 23 marks, potentially higher.
Solutions to these questions, along with additional practice questions and videos, are available via a course.
Students are encouraged to join a WhatsApp group for further support and course purchase information.
Diligent study throughout the semester is advised rather than last-minute preparation.

Chapter 1: Measurements

SI units (International System of Units) and their symbols (meter (m), kilogram (kg), second (s), ampere (A), kelvin (K), candela (cd), mole (mol)).
GTU exam potentially includes a table of SI units (worth 3-4 marks).
Micrometer screw gauge's Least Count (LC) formula: LC = Pitch / Number of divisions on the circular scale.
Accurate diagrams of the micrometer screw gauge, with labeled parts, using a pencil and ruler are recommended.
Practice questions related to the Micrometer Screw Gauge are available in the course materials.

Chapter 2: Electrostatics

Coulomb's Law: F = k * q1 * q2 / r² where k = 1 / 4πε₀ (vacuum).
Electric field lines originate from positive charges, terminate on negative charges, and never intersect. Stronger field strength when lines are closer together.
Series and parallel combinations of capacitors:
- Series: 1/C = 1/C1 + 1/C2 + 1/C3
- Parallel: C = C1 + C2 + C3
Exam likely includes a question comparing series and parallel combinations.
Capacitor definition: a device for storing electrical energy, symbol "C", measured in Farads (F), C = Q/V (Q = charge, V = potential difference).
Students need to understand electric potential difference and its unit (likely a question on the exam).

Chapter 3: Heat

Three modes of heat transfer: Conduction, Convection, Radiation.
Temperature scales: Celsius, Fahrenheit, Kelvin.
Importance of understanding diagrams, structures, advantages, disadvantages, and uses of: mercury thermometers, bimetallic thermometers, platinum resistance thermometers, and infrared thermometers.
Likely to see a question on at least one, possibly two thermometers.
Thermal conductivity definition & applications.
Definitions of calorie, heat capacity, and specific heat capacity, and their units (crucial for the exam).

Chapter 4: Waves

Differentiation of transverse and longitudinal waves.
Properties of sound waves and light waves.
Sound wave velocity, wavelength, and frequency relationship: v = n * λ.
Methods for generating ultrasonic waves: Electromagnetic and Piezoelectric.
Ultrasonic waves' significance and uses (medical technology, sonar, depth measurement, drilling, soldering).
Definitions of mechanical waves, non-mechanical waves, frequency, wavelength, time period, and amplitude.

Chapter 5: Light

Refraction of light and Snell's Law: the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant (refractive index).
Full name of a laser: Light Amplification by Stimulated Emission of Radiation.
Differentiation between ordinary light and laser light.
Fiber optic cable structure and differences between step index and graded index fibers.
Important applications of lasers and optical fibers, and ultrasonic waves (will be part of the exam).
A short note on total internal reflection is required.

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Description

This quiz provides important questions for the GTU Diploma Semester 2 Physics examination, subject code 43005. With 30 essential questions, students will gain the knowledge necessary to pass the exam and potentially score higher. The focus is on mastering key concepts to ensure thorough preparation throughout the semester.