ELECTRICITY CHAPTER # 16 Physics 10th - Question Answers

 Physics 10th - Question Answers

ELECTRICITY
CHAPTER # 16

Q.1: What do you know about the electrical nature of matter?

Ans:
Matter is made up of atoms and an atom consists of three elementary particles called neutron, proton, and electron.

• Proton is positively charged and present in the nucleus. It is 1836 times heavier than an electron.
• Neutron has no charge. It is also present in the nucleus. Its mass is equal to the mass of a proton.
• Electron is a negatively charged particle. Its charge is equal to the charge of a proton. Electrons move around the nucleus in orbits.

NATURE OF LIGHT AND ELECTROMAGNETIC SPECTRUM CHAPTER # 15 Physics 10th - Question Answers

 Physics 10th - Question Answers

NATURE OF LIGHT AND ELECTROMAGNETIC SPECTRUM
CHAPTER # 15

Q.1: What is Newton’s corpuscular theory of light?

Ans:
This theory which was proposed by Newton is given briefly as under:

• Light consists of tiny (minute) particles called corpuscles.
• These corpuscles are emitted from a source of light (like the sun).
• These corpuscles are traveled in a straight line.
• When these particles enter the eyes, they create the sensation of sight.
• Velocity of light in a denser medium is greater.

Refraction of Light and Optical Instruments (Chapter # 14) Physics 10th Question Answers

Refraction of Light and Optical Instruments

Q.1: Define refraction of light and laws of refraction?

Answer:

Refraction: When a ray of light enters from one medium into another obliquely, it undergoes a change not only in direction but in velocity as well. This change of direction and velocity of light as it enters from one medium into another is known as refraction of light.

PROPAGATION AND REFLECTION OF LIGHT (Chapter # 13) Physics 10th - Question Answers

Physics 10th - Question Answers

PROPAGATION AND REFLECTION OF LIGHT

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Q.1: What do you understand by rectilinear propagation of light or path of light?

Ans:

• A ray of light travels in a straight path or straight line. This phenomenon is known as rectilinear propagation of light.

WAVES AND SOUND (Chapter # 12) Physics 10th - Question Answers

 Physics 10th - Question Answers

WAVES AND SOUND

Q.1: Define the following terms:

• Wave
• Wave motion
• Oscillation or vibration
• Oscillatory or vibratory motion
• Periodic motion
• Displacement
• Amplitude
• Time period
• Frequency
• Wavelength

HEAT : Chapter # 11 Physics 10th - Question Answers

 Physics 10th - Question Answers

Chapter # 11: HEAT

Q.1: Define Heat. What is its unit?
Ans: HEAT:
The total kinetic energy of the molecules present in a body is called heat. It is the form of energy which is transferred from one body to another due to the difference in temperature.

Unit:
The S.I. unit of heat is Joule.

PROPERTIES OF MATER CHAPTER # 10 Physics 10th - Question Answers

 Physics 10th - Question Answers

PROPERTIES OF MATER
CHAPTER # 10

Q.1: Define matter?
Ans: MATTER:
Anything which occupies space and has mass is called matter.

Q.2: Write down the properties of solids?
Ans: PROPERTIES OF SOLIDS:

• The solid bodies have fixed volume and fixed shape.
• In solids, the molecules are closely packed.
• The force of attraction between molecules is very strong; it is because of strong attraction that the solid has fixed shape and fixed size.
• The motion of molecules in a solid body is very much restricted. They just vibrate about their mean position.
• In solids, molecules do not leave their mean position.
• The relative distance between the atoms or molecules of a solid body is fixed.

Simple Machines (Chapter # 09) Physics 10th -Question Answers

 Physics 10th - Simple Machines

Q.1: Define Machine. Write Down the Useful Purposes of Machines.

Ans: Machine: A machine is a device used to perform work in a more convenient way or to speed up work.

OR

A machine can be defined as any device that uses force applied at one point to overcome resistance at another point.

Work, Power, and Energy (Chapter # 08) Physics 10th Question Answers

 Physics 10th - Work, Power, and Energy

Q.1: Define Work. Write Its Formula and Unit. Write Down the Factors on Which Work Depends.

Ans: Work: When a force acts on a body and the body moves through some distance in the direction of the force, work is said to be done.

Circular Motion and Gravitation (Chapter # 07) Physics 10th - Question Answers

 Physics 10th - Question Answers

Circular Motion and Gravitation (Chapter # 07)

Q.1: Define Circular Motion and Give Any Two Examples.

Ans: Circular Motion: When a body moves along the circumference of a circle, it is called circular motion.

Examples:

• The rotation of Earth and other planets around the Sun.
• The wheel of a moving bicycle.

Equilibrium (Chapter # 06) Physics 10th - Question Answers

Physics 10th - Question Answers

Equilibrium (Chapter # 06)

Q.1: Define Parallel Forces?

Ans: Parallel forces can be defined as: “When a number of forces act on a body and if their directions are parallel, they are called parallel forces.”

VECTORS : CHAPTER # 05 Physics 10th - Question Answers

 Physics 10th - Question Answers

CHAPTER # 05: VECTORS

Q.1: Define scalar and vector quantities and give five examples of each?

Ans:

Scalar Quantities: Physical quantities which have magnitude and units but there is no need of direction to describe them are called scalar quantities. Scalar quantities can be solved by simple arithmetic rules. They can add, subtract, multiply, and divide easily.

Examples: Mass, length, time, speed, distance, volume, temperature, heat, energy, pressure, power, etc.

MOTION AND FORCE Chapter # 04 Physics 10th - Question Answers

 Physics 10th - Question Answers

MOTION AND FORCE
Chapter # 04

Q.1: Define force. Write down its formula and units. Also write down the factors on which force depends?

Ans: FORCE:
Force is that agent which changes or tends to change the state of rest or of motion of a body. It can also distort or tends to distort the shape of a body to which it is applied. It is denoted by $F$. It is a vector quantity.

KINEMATICS OF LINEAR MOTION Chapter # 03 Physics 10th - Question Answers

 Physics 10th - Question Answers

KINEMATICS OF LINEAR MOTION
Chapter # 03

Q.1: Define rest?

Ans: REST:
A body is said to be in the state of rest if it does not change its position with respect to its surroundings.

MEASUREMENT Chapter # 02 Physics 10th - Question Answers

 Physics 10th - Question Answers

MEASUREMENT
Chapter # 02

Q.1: What is measurement? What is the importance of measurement?

Ans: MEASUREMENT:
The meaning of measurement is the comparison of an unknown quantity with a standard, to see how many times it is big or small as compared to the standard.

INTRODUCTION TO PHYSICS Chapter # 01 Physics 10th - Question Answers

 Physics 10th - Question Answers

INTRODUCTION TO PHYSICS
Chapter # 01

Q.1: What is Physics? Write the name of branches of Physics and explain them?

Ans: PHYSICS:
Physics is defined as a science which deals with the interaction of matter and energy.
OR
It is the branch of science which deals with physical properties, behavior of matter and bodies. Nowadays, Physics deals with the production of energy and their mutual relationship.

FUNCTIONS:Chapter # 05: COMPUTER SCIENCE 10TH – DETAILED QUESTION ANSWERS

 COMPUTER SCIENCE 10TH – DETAILED QUESTION ANSWERS

Chapter # 05: FUNCTIONS

Q.1: What do you know about functions?

Ans:
INTRODUCTION TO FUNCTIONS
A function is a block of code that performs a particular task. It is also called a method or a sub-routine or a procedure, etc. There are some situations when we need to write a particular block of code more than once in our program. This may lead to bugs and irritation for the programmer. C++ language provides an approach in which you need to declare and define a group of statements once and that can be called and used whenever required. This saves both time and space. Every C++ program has at least one function, which is main(), and all the programs can define additional functions.

CONTROL STRUCTURE-Chapter # 04- COMPUTER SCIENCE 10TH – DETAILED QUESTION ANSWERS

 COMPUTER SCIENCE 10TH – DETAILED QUESTION ANSWERS

CONTROL STRUCTURE
Chapter # 04

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Q.1: What are control structures?

Ans:
CONTROL STRUCTURES / STATEMENTS
Control structures control the flow of execution in a program or function. Control structures are used to repeat any block of code, transfer control to a specific block of code, and make a choice by selection. There are three basic control structures in C++ programming:

1. Selection / Decision Making Control Structure
2. Loops / Iteration Control Structure
3. Jumps

INPUT / OUTPUT HANDLING IN C++ Chapter # 03- COMPUTER SCIENCE 10TH – DETAILED QUESTION ANSWERS

 COMPUTER SCIENCE 10TH – DETAILED QUESTION ANSWERS

INPUT / OUTPUT HANDLING IN C++
Chapter # 03

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Q.1: Describe basic structure of C++ program.

Ans:
BASIC STRUCTURE OF C++ PROGRAM
A C++ program is mainly divided into three parts:

1. Preprocessor Directives
2. Main Function Header
3. Body of program / Function

Basics of Programming in C++ -Chapter #02- Computer Science 10th - Detailed Question Answers

 Computer Science 10th - Detailed Question Answers

Basics of Programming in C++

Q.1: Define Computer Program?
Ans. Computer Program:
A computer program is a set of instructions that performs a specific task when executed by a computer. A computer requires programs to function and typically executes the program's instructions in a central processing unit. A computer program is usually written by a computer programmer in a programming language.