Don't worry! In this comprehensive guide, we are going to
discuss the most common, expected, and highly important viva questions that are frequently asked in board
practical exams. While the examiner can ask anything from the entire 9th and
10th-grade syllabus, focusing on these specific practical-wise key terms will
give you a massive advantage.
Make sure to read till the end, note down these questions, and
share them with your friends!
🎯 Part 1: Class
9th Physics Practical Viva Questions
The
examiner usually picks a key term from your practical notebook and asks for its
definition, unit, or formula. Here are the most critical topics you must
prepare:
1. Measurements & Instruments
· Vernier Callipers & Screw Gauge: What is the basic
difference between them? For what purpose are they used?
· Least Count (L.C.): Very, Very Important! You must remember the definition
of least count and the exact values for:
o Meter Rod
o Vernier Callipers
o Screw Gauge
· Formulas: Make sure you memorize the exact formulas
used to calculate the Diameter and Area of an object.
· Zero Error: What is Zero Error? How do
you identify if a zero error is Positive or Negative?
2. Mechanics & Motion
· Acceleration: Define acceleration
and know its SI unit.
· Value of 'g' (Free-Fall Method): What quantity do we
find using the free-fall method? What is the value of $g$ on Earth?
· Atwood's Machine: What is Atwood's
Machine and why is it used?
3. Friction & Forces
· Friction: Define friction and the factors affecting it.
· Limiting Friction: What is meant by
limiting friction?
· Resultant Force / Resultant Vector: Be ready with the
definitions of both terms as they are frequently asked in graphical practicals.
4. Turning Effect of Forces & Properties
of Matter
· Principle of Moments: Highly Important! Memorize the exact statement and
definition.
· Tension: What is tension in a string? What is its
unit?
· Simple Pendulum:
o What is a simple pendulum?
o What is the formula for its Time Period?
o Crucial Question: On which factors does
the time period of a simple pendulum depend, and why is it independent of Amplitude?
· Hooke's Law: Understand the relationship between Load and Extension.
· Archimedes' Principle: Define the principle.
You should also know the concept of Density and why a
heavier body sinks while a lighter body floats.
5. Heat & Thermodynamics
· Temperature vs. Time Graph: Understand how the
curve behaves during heating.
· Latent Heat: Memorize the definitions of both Latent Heat of Fusion and Latent Heat of Vaporization.
🎯 Part 2: Class
10th Physics Practical Viva Questions
For
10th grade, the focus shifts towards Optics, Electricity, and Basic
Electronics.
1. Optics (Light)
· Refraction of Light: What is refraction?
State the Laws of Refraction.
· Refractive Index: Define refractive
index. What is the refractive index of water and glass?
· Mirrors: What is the main difference between a Concave Mirror and a Convex Mirror?
· Critical Angle & Prism: Define critical angle
and explain what a prism does to white light.
· Angle of Deviation: What is it and how is
it formed?
· Parallax Method: Very Important! What is parallax and how do we remove
it?
· Microscope & Telescope: What is the core
purpose of both optical instruments?
2. Electricity & Magnetism
·
Ohm's Law: State Ohm's Law and its mathematical formula
($V = IR$).
·
Conductors vs. Insulators: Core differences with
examples.
·
Resistors & Circuits:
o
What is resistance and what is its unit?
o
How do you write the final equivalent
resistance equation for a Series Circuit and a
Parallel Circuit?
·
Galvanometer: What is a
galvanometer?
·
Half-Deflection Method: Explain the method
used to find the resistance of a galvanometer.
·
Magnetic Field: Define a magnetic
field and magnetic lines of force.
·
Current & Ampere: Define electric
current and define its unit, the Ampere.
3. Basic Electronics (Logic Gates)
·
Logic Gates: Guaranteed Viva Topic!
You must know the:
o
Symbols of ALL basic gates (AND, OR, NOT, NAND, NOR).
o
Truth Tables for these gates.
o
Circuit Diagrams.
📌 Remember: The examiner usually catches "Key
Words" from your answers. If you mention density, they might ask for the
formula of density. Therefore, always prepare the following general theory
concepts thoroughly:
1.
Definitions: Physics, Base Units, Derived Units, Plasma,
Pressure, and Density.
2.
Formulas & Units: Never forget to
mention the SI unit of any physical quantity you talk about.
3. Confidence: Listen to the question carefully before answering. If you don't know the answer, politely say, "I am sorry sir, I don't recall it right now."
📢 Share the Knowledge!
This
guide has been compiled specially upon the repeated requests of students who
are appearing in the exams right now.
Drop a comment below if you have any questions, and don't forget
to share this post with your classmates and study groups
so everyone can get full marks in their viva!
Best of luck with your exams!
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