Magnetism and Electromagnetism

The deflection yoke contains electromagnetic coils that steer the electron beam horizontally and vertically across the CRT screen to create the image. Transformers change voltage, capacitors store electrical charge, and diodes rectify AC to DC.

Iron is a ferromagnetic material, meaning it is strongly attracted to magnets. This property is due to the alignment of magnetic domains within the metal when exposed to a magnetic field. This fundamental property of iron is why it's widely used in electromagnets and magnetic applications.

Iron is ferromagnetic and strongly attracted to magnets. Glass, leather, and sodium are not magnetic materials.

A freely suspended magnet aligns with Earth's magnetic field, pointing north-south. This is why compass needles indicate direction. The north pole points toward magnetic north.

A freely suspended magnet aligns with Earth's magnetic field, pointing north-south. This is why compass needles indicate direction. The north pole points toward magnetic north.

The relationship is X does Y / X causes Y. Gravity pulls objects toward each other. Similarly, magnetism causes attraction between magnetic materials. Both represent fundamental physical forces and their directional effects.

Gravity exerts pull as its fundamental action/force. Similarly, magnetism exerts attraction as its fundamental force. Iron:metal is a type relationship. North pole:directions is location-attribute. Dust:desert is part-whole but not action-based.

A fluxmeter is an instrument designed to measure magnetic flux or magnetic field strength. It operates on the principle of electromagnetic induction and is commonly used in physics laboratories and engineering applications.

NFC (Near Field Communication) operates on the principle of inductive coupling between two coil antennas. When devices are brought within close proximity (typically 4cm or less), magnetic induction generates an electric current that enables data transmission. Magnetic coupling alone is incomplete without the inductive mechanism, and electromagnetic coupling is too broad a term.

MAGRAM stands for MAGnetic Radar Absorbing Material, which are specialized materials used in stealth technology to absorb radar waves and reduce radar cross-section. These materials use magnetic properties to dissipate radar energy as heat, making objects less detectable by radar systems.

Yes, it is the correct answer. This statement is false. Their domains are grouped in parallel and anti-parallel directions but in unequal number.

This is the correct answer as both are correct uses for electromagnets. Cranes at the sea docks use electromagnets. Doctors use them for picking up tiny magnetic materials that have fallen in the eye.

This is the correct answer as both statements are correct. When electric current passes through a wire, it behaves like a magnet. Electromagnets can be made very strong and can lift very heavy loads.