Magnetism
What's the origin of the term "magnetism," which traces back to a region in Greece famous for its naturally appearing magnets?
Magnesia
What does the symbol B represent in the context of magnetism?
Magnetic Field (strength)
Which of the following processes does not directly relate to electromagnetic induction?
A. Charging a battery
B. Operating a transformer
C. Generating electricity in a wind turbine
D. Inducing current in a coil by moving a
A. Charging a battery
What is the speed of light in a vacuum?
3x10^8m/s
What happens to a ferromagnetic material's domains when it is magnetized?
A. They shrink in size.
B. They become randomly aligned.
C. They align with the magnetic field.
D. They lose their magnetic properties
C. They align with the magnetic field.
Which factor determines the magnitude of the magnetic field produced by a current-carrying wire at a
given distance from the wire?
A. The wire's length
B. The wire's resistance
C. The wire's current
D. The wire's temperature
C. The wire's current
It is used to increase or decrease voltage levels in power transmission and distribution systems
Transformer
What is this formula called: n1sinθ1=n2sinθ2.
Snell's Law Formula
What do we call the areas in a magnet where atoms are uniformly aligned?
Magnetic Domains
According to the right-hand rule, when you hold a straight wire carrying current with your right hand, what does your thumb signify?
The direction of the current
What unit is used to measure magnetic flux?
Weber
It is a fundamental particle representing a quantum of light or other electromagnetic radiation. It is the basic unit of all forms of electromagnetic radiation, including visible light, radio waves, X-rays, and gamma rays.
Photon
Which part of a magnet is the strongest?
A. Center
B. South pole
C. North pole
D. Both the north and south poles
D. Both the north and south poles
magnetic field along a straight current-carrying conductor forms what shape around the wire?
A. Straight lines
B. Parabolas
C. Ellipses
D. Concentric circles
D. Concentric circles
Which law explains the induced electromotive force (EMF) in a coil resulting from a change in magnetic flux?
Faraday's Law
He described light as a propagating wave made up of electric and magnetic fields.
James Clerk Maxwell
Who was the individual credited with uncovering the connection between electricity and magnetism, eventually leading to the concept of electromagnetic induction?
Hans Christian Oersted
What principle governs the relationship between the electric current flowing through a conductor and the magnetic field it produces?
Ampere's Law
A transformer is designed to step down the voltage from 140V to 14V. If the primary coil has 700 turns,
how many turns should the secondary coil have?
70
A light ray passes from air into water. The angle of incidence in air is 30 degrees. If the refractive index of air is 1.00 and the refractive index of water is 1.33, what is the angle of refraction in water?
22.09 degrees