How Much Do You Know About Electromagnetic Interaction?

The unit of frequency for electromagnetic waves is the Hertz (Hz), named after Heinrich Hertz, a German physicist who first conclusively proved the existence of electromagnetic waves. It is used to measure the number of cycles or oscillations per second of a periodic wave, such as an electromagnetic wave.

According to Ampere's law, the magnetic field strength around a current-carrying loop is directly proportional to the number of loops. Therefore, as the number of loops increases, the magnetic field strength also increases.

Among the given options, gamma rays have the highest frequency. They have the shortest wavelength and carry the most energy among electromagnetic waves.

Electric forces and magnetic forces are interrelated and interdependent. According to Maxwell's equations, a changing electric field induces a magnetic field, and a changing magnetic field induces an electric field. Therefore, they work together to create electromagnetic interactions.

The correct answer is option b. Unlike the other options, an iron bar does not produce an electromagnetic wave. Electromagnetic waves are generated by the movement or oscillation of electric charges, while an iron bar does not possess this property.

The Sun is the primary source of electromagnetic waves. It emits a wide range of electromagnetic radiation, including visible light, radio waves, infrared waves, ultraviolet waves, and more.

Magnetic fields are not influenced by gravity. They are produced due to the presence of electric charges in motion and exert forces on moving charges. Certain materials can shield or decrease the effects of magnetic fields.

The SI unit of magnetic field strength is the Tesla (T). One tesla is equivalent to one newton per ampere-meter (N/(A⋅m)). The tesla is used to measure the strength or intensity of a magnetic field.

Electromagnetic induction occurs when a charged particle moves in a magnetic field. This movement induces the generation of an electric current or electromotive force (EMF).

According to the wave equation, c = λ * f, where c is the speed of light, λ is the wavelength, and f is the frequency. As the wavelength decreases, in order to maintain the speed of light, the frequency must increase.

The magnetic field strength decreases with distance from a current-carrying wire. This relationship follows the inverse square law, meaning that as the distance increases, the magnetic field strength decreases.

The speed of electromagnetic waves in a vacuum is approximately 299,792,458 meters per second, which is also known as the speed of light. This value is denoted by the symbol "c" and is a fundamental constant in physics. It represents the speed at which light and other electromagnetic waves propagate through a vacuum.

Refraction is the phenomenon where light waves change direction as they pass from one medium to another due to a change in its speed.

When electric current passes through a straight wire, it produces a magnetic field around it. Following the right-hand grip rule, if you align your thumb with the current flow, your fingers indicate the counterclockwise direction of the magnetic field.

The repulsion or attraction between two electric charges is caused by the interaction between their electric fields. According to Coulomb's law, like charges repel each other, while opposite charges attract each other due to the influence of the electric fields they create.