Physics

This chapter sheds light on the concept of force. It highlights the effects of force on mass, speed, direction, change in shape and size. It explains friction and its types. We will also study the advantages and disadvantages of friction.

This chapter explains the concepts of work, energy, and power. It also teaches us about energy conversions. Furthermore, it includes some formulas and results to solve the questions on work done.

This chapter explains the working of a machine. It discusses the block and tackle system. It describes different classes of a lever. We will also learn how to solve questions based on an inclined plane.

This chapter explores the refraction of light, its laws, refractive index and its significance. We will study the refraction of light through various media and normal displacement. It also describes the total internal reflection and its applications.

In this chapter, we will learn about the real and virtual images in detail. It discusses the function of the power lenses, including their magnification and focal length. It also briefs on the working mechanism of a simple microscope.

This chapter covers topics like deviation produced by a triangular prism, electromagnetic spectrum, properties and uses of different radiations of electromagnetic spectrum, and scattering of light.

This chapter comprises the details of loudness, pitch and quality of sound. It describes the musical instruments which include wind instruments, stringed instruments and the percussion instruments. We will also learn about the unit of loudness.

This chapter sheds light on the current electricity. It discusses the sources of direct current, electric circuits, and detection of current through diagrams. It also describes Ohm’s law, electrical resistance, and conductors and insulators.

In this chapter, we will understand the magnetic effect of current. We will learn about the conversion of mechanical energy to electrical energy and vice versa. It further describes the working of a transformer.

The chapter discusses the process of measuring heat by explaining calorimetry and the instrument associated with it. It also explains some examples of calorimetry. Questions related to specific heat capacity with detailed answers are also given here.

This chapter deals with the concept of electron emission in detail with examples. It also briefs about thermionic emission, field emission, and photoelectric emission.