Electricity and Magnetism

No, a positively charged glass rod will not be attracted to a magnet. Magnets attract materials with unpaired electrons or magnetic properties, which glass does not have.

During periods of magnetic pole reversals, the Earth's magnetic field weakens, leading to decreased shielding of cosmic rays. This can result in an increase in cosmic ray intensity at the Earth's surface because fewer cosmic rays are being deflected away by the weaker magnetic field. As the field weakens and reverses, cosmic rays can penetrate deeper into the atmosphere, impacting climate and potentially affecting electronic systems.

Metals such as aluminum, silver, and gold are known to be good reflectors of electromagnetic radiation, including visible light and infrared radiation. Their smooth and shiny surfaces allow for efficient reflection of a wide range of electromagnetic wavelengths.

Lead is a good conductor of electricity compared to sulfur. This is because lead has free-flowing electrons that can easily carry an electric current, while sulfur lacks these free electrons and does not conduct electricity as well.

Copper is not commonly used as a semiconductive material; it is used as a conductive material due to its high electrical conductivity. Semiconductive materials like silicon and gallium arsenide are preferred for electronic devices due to their ability to switch between conducting and non-conducting states, which is essential for creating transistors and other semiconductor devices.

A closed circuit ensures that there is a continuous path for the flow of electrons, allowing a complete transfer of energy. When the circuit is open, there is no complete path for the energy to flow, resulting in a disruption of the transfer process.

A switch is necessary to be able to turn the electrical circuit on and off, otherwise it would stay "on" all the time, until either the source of power stops giving out power - like a battery which goes dead - or part of the circuit stops working, like a light bulb that fails to work after a long time or a that motor siezes-up, overheats and eventually burns out.

Even if you just disconnect a wire from the source of power, you are doing the same thing as a switch.

Hydroelectric power plants generate about 7% of the electricity in the United States.

The Earth acts like a giant magnet with its magnetic north pole located near the geographic North Pole. The compass's magnetic needle aligns itself with the Earth's magnetic field, pointing north. By using the compass in conjunction with a map, travelers can determine their direction and navigate accurately.

Yes, Canadians have access to electricity just like most developed countries. The electricity infrastructure in Canada is quite developed and reliable, with most households and businesses being connected to the grid.

If the current direction in the wire changes from going up to going down, the direction of the magnetic field around the wire will reverse. This is governed by the right-hand rule, where the direction of the magnetic field is perpendicular to the direction of current flow. Overall, the magnitude of the magnetic field would remain the same, but its direction would be opposite.

1.05 V

Yes, it is possible to convert 120VAC 60Hz to 220VAC 50Hz using a step-up transformer with the appropriate turns ratio. However, the conversion may require additional components such as frequency converters to accurately achieve the desired output. It is recommended to consult with an electrical engineer or expert for assistance in designing and implementing the conversion system.

There are many branches or jobs dealing with electricity. Some jobs are electric power generator operators, power distributor and dispatchers, and line installers and repairmen. There are electrical technicians, electrical engineers, and meter readers as well.

Hydroelectric power is generated by harnessing the energy of flowing water. Water stored in a reservoir flows through turbines, which spin a generator to produce electricity. The movement of the water turns the turbines, converting the kinetic energy of the water into electrical energy.

An ironing board cover that is only fabric would be more of an insulator between the wood or metal surface of the ironing board.

An ironing board cover with a foam backing and an aluminum type fabric on top would be both an insulator as well as a conductor of heat, to have heat distribute more evenly through the item being ironed.

It is best to take it to your local recycling centre. Most towns in Europe and USA now have proper disposal points, in a segregated bin or container. For domestic refuse there is generally no charge.

No. Wood is a poor conductor of electricity unless it is wet/saturated with water.

A complete electrical circuit is formed even with just one wire because the wire provides a path for the flow of electrons from the power source to the light bulb and back. This flow of electrons allows the bulb to light up. In this scenario, the bulb is acting as a resistor completing the circuit.

Caesium is a good conductor of electricity because it has one valence electron that can move freely within the metallic structure. This allows the electron to flow easily in response to an applied electric field, conducting electricity efficiently.

Yes. When a material is magnetized the magnetic domains are aligned.

Electric current is described in units of 'Amperes' . It's a direct expression of

the number of electrons that pass a point in the circuit every second.

"1 Ampere" is something like 6,250,000,000,000,000,000 electrons per second.

The left-hand rule, a rule used in physics to determine the direction of magnetic force in a conductor, was developed in the 19th century by scientists such as John Fleming and Oliver Heaviside. However, the specific date of its invention is not precisely recorded.

Most likely not.

Light is made up of photons, and even photons have mass..Thus light is a particle as particles are mass.

But to confuse you, even though light = photons & photons = particle & particle = mass; the photons also act as a wave.

Which is rather incredible, because it means that a mass also acts as a wave.