Bangla Note of Physics 2nd paper for HSC
Magnetic Effect of Electric Current When electric current flows through a wire wound around an iron bar, the bar behaves like a magnet. This magnet is called an electromagnet. An electromagnet is formed due to the magnetic effect of electric current. This magnetic effect of electric current was discovered by Hans Christian Oersted. Once, while … Read more
Last Updated: March 19, 2026 at 8:51 pmMath Solution of Magnetic Effect of Electric Current When electric current flows through a wire wound around an iron bar, the bar behaves like a magnet. This magnet is called an electromagnet. An electromagnet is formed due to the magnetic effect of electric current. This magnetic effect of electric current was discovered by Hans Christian … Read more
Last Updated: March 19, 2026 at 8:51 pm
Magnetic Material & Terrestrial Magnetism Earth’s magnetic field (also known as the geomagnetic field) is the magnetic field that extends from the Earth’s inner core to where it meets the solar wind, a stream of energetic particles emanating from the Sun. Its magnitude at the Earth’s surface ranges from 25 to 65 µT. It is … Read more
Last Updated: March 19, 2026 at 8:51 pmMath Solution of Magnetic Material & Terrestrial Magnetism Earth’s magnetic field (also known as the geomagnetic field) is the magnetic field that extends from the Earth’s inner core to where it meets the solar wind, a stream of energetic particles emanating from the Sun. Its magnitude at the Earth’s surface ranges from 25 to … Read more
Last Updated: March 19, 2026 at 8:51 pmElectromagnetic Induction & Alternating Current Electromagnetic induction is the production of a potential difference (voltage) across a conductor when it is exposed to a varying magnetic field. Michael Faraday is generally credited with the discovery of induction in 1831 though it may have been anticipated by the work of Francesco Zantedeschi in 1829. Around 1830 … Read more
Last Updated: March 19, 2026 at 8:51 pmMath Solution of Electromagnetic Induction & Alternating Current Electromagnetic induction is the production of a potential difference (voltage) across a conductor when it is exposed to a varying magnetic field. Michael Faraday is generally credited with the discovery of induction in 1831 though it may have been anticipated by the work of Francesco Zantedeschi in … Read more
Last Updated: March 19, 2026 at 8:51 pmElectromagnetic Wave Light, microwaves, x-rays, and TV and radio transmissions are all kinds of electromagnetic waves. They are all the same kind of wavy disturbance that repeats itself over a distance called the wavelength. Electromagnetic waves are waves which can travel through the vacuum of outer space. Mechanical waves, unlike electromagnetic waves, require the presence … Read more
Last Updated: March 19, 2026 at 8:51 pmMath Solution of Electromagnetic Wave Light, microwaves, x-rays, and TV and radio transmissions are all kinds of electromagnetic waves. They are all the same kind of wavy disturbance that repeats itself over a distance called the wavelength. Electromagnetic waves are waves which can travel through the vacuum of outer space. Mechanical waves, unlike electromagnetic waves, … Read more
Last Updated: March 19, 2026 at 8:51 pmReflection of Light Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. The law of reflection says that for specular reflection the angle at which … Read more
Last Updated: March 19, 2026 at 8:51 pm