Electricity and Magnetism

Yes, asbestos has been used as an electrical insulator in cables, fuse boxes, fuses etc.

A battery snap is a kind of connector, used on certain batteries.

Popular 9v batteries have terminals on them like a 'press stud'. They are polarized, one connection is like a claw and the other like a button. This make sure that the connection only fits one way round or on the correct terminals, preventing reverse polarity damage. Small batteries like the PP3, have the two connectors on one clip, or board. Larger batteries will have the connectors separate, one on each wire.

A large "test charge" would influence the field you want to measure.

An electromagnet uses electricity to create the magnetic field. Moving charges create magnetic fields. Knowing that, if we have a lot of copper wire (with a suitable insulator) wrapped around an iron core, we can send direct current through that wire, and it will create a magnetic field. The magnetic field will magnetize the iron core, and the core becomes a magnet. Wrapping wire around a nail and connecting a battery to the ends of the wire will make a simple electromagnet.

Generally speaking, no, they are not. Lead is a pretty good electrical conductor, but pyrite (iron disulfide), which has variable electrical conductivity, might actually be tagged as a semiconductor.

Yes, the attractive force of a magnet is greatest at its poles because this is where the magnetic field is strongest. The strength of the magnetic force decreases as you move away from the poles towards the center of the magnet.

If the magnetic field is caused only by a current, you can turn the current off.If you have another magnetic field, for example due to a permanent magnet, with a current you can create a magnetic field that counters the first one. But that will only work in certain regions in space; you can't cancel such a magnetic field everywhere in space.

Walking across a nylon carpet can cause charge separation between you and the carpet. You take on an electrostatic charge as a result. Touching a door knob allows that charge you accumulated to neutralize via a discharge event. The static discharge is the electric shock.

Yes, electricity can flow through an iron nail. Iron is a good conductor of electricity, allowing electrons to move freely through it. This is why iron nails are commonly used in science experiments to demonstrate electrical conductivity.

The strength of the electric field from a positive point charge decreases as the distance from the charge increases. This relationship follows an inverse-square law, meaning that the electric field strength is inversely proportional to the square of the distance from the charge. So, the farther you are from the charge, the weaker the electric field will be.

The SI units used in electricity include:

coulomb- unit of electrical charge

volt - unit of potential (joule/coulomb)

ampere - unit of current flow (coulombs per second)

watt - unit of power (volt-ampere)

ohm - unit of resistance

farad - unit of capacitance

henry - unit of inductance

siemens - unit of conductance

The term galvanometer is used to refer to a meter which can measure small currents, usually in the mA (10-3A) or mA (10-6A) range. When a soft iron core is used, the magnetic field lines tend to crowd through the core. It is because soft iron core is ferromagnetic in nature. As a result, the strength of the magnetic field due to the field magnet increases, which in turn increases the sensitivity of the galvanometer.

Any current will produce a magnetic field. If you let a current pass through the wire, you got your magnetic field.Note: If you connect the wire directly to the battery, without any resistance, you'll most likely destroy the battery, due to a short circuit.

It's correctly spelt mica and it is a mineral, not a stone. No, it, isn't magnetic- it is a phyllosilicate mineral with a layered structure and is chemically inert. It has superior electrical properties as an insulator, and can support an electrostatic field whilst dissipating minimal energy in the form of heat.

These devices are called generators, alternators, magnetos, or dynamos. These devices produce electrical energy from mechanical energy. The opposite is a motor which produces mechanical energy from electrical energy.

Electricity does not flow well through wood because wood is a poor conductor of electricity. The electrons in wood are tightly bound to the atoms, making it difficult for them to move freely and carry an electrical current. As a result, wood does not allow electricity to flow through it easily.

An Electromagnet.

Take a screwdriver, and a put 50 turns of wire round the screwdriver. Now connect one wire to positive and one wire to negative of a battery and try to pick up some paperclips.

Yes. Placing a rotating magnet below it can generate a magnetic field that creates a spin in the suspended magnet. If the magnet is mounted on a low-friction axis, bringing an opposite pole toward one side of the magnet, then removing it, will add force to spin it for awhile.

In metals, electrical conductivity increases with higher number of free electrons, which can be influenced by factors like temperature and impurities. In non-metals, electrical conductivity is generally lower due to lack of free electrons, but can increase with doping or introduction of impurities.

I would expect a voltage in both coils of wire.Note that, if the two coils are connected, the voltages (and corresponding currents) in the coils can interact.

Also, if the two coils are NOT connected, they can STILL interact, since a current will produce its own magnetic field.

talk about how life would change in small village if electricity was brought to it

Yes. Pure gold is a much better conductor than pure germanium is.

A washer needs electricity to power its motor, which drives the drum to wash and spin the clothes. Electricity is also required to operate the control panel and other electronic components, such as sensors and timers, that regulate the washing cycle.

properly grounded to ensure safety and efficient operation. It must also be protected by fuses or circuit breakers to prevent damage in case of power surges or shorts. Regular maintenance and checks are important to ensure the circuit's integrity and avoid any electrical hazards.

if the magnet has a low enough mass, and the string induces very little forces and friction on the magnet, it will act like a compass, the south end will point to the north pole and vice versus with north