Only two? Most metal oxides won't: tantalum pentoxide won't, which is why electrolytic (wet) capacitors work. Alumina serves the same purpose in dry capacitors. Almost any ceramic material will insulate. How about glass? Try conducting electricity through glass or quartz, both made of sand.
it is known as coil
The conduct of electricity
it is something that causes an electric field
Yes you can but you need to convert the passing electrons into photons just by the use of an LED. If you want to see a large current you must use a product called INDI-LINK.INDI -LINK is a proprietary device that is essentially a current shunt or wire-LINK that INDIcates (hence the name) the presence of an electric current over the wide range of 3mA to 10 Amperes AC or DC. It allows circuits that are working properly to be read by eye as to their functional condition and will find use in just about anything electric.See INDI-LINK on facebook and Utube for more information.
conduct
it is known as coil
The conduct of electricity
Current
The name for the status of a circuit that has breaks which electric current that can't flow is called a Closed Circuit. Electric current cannot flow through an open circuit.
That's a "direct" current.
ampere is the unit in all the systems for electric current
it is something that causes an electric field
Flowing electricity is called electric current.
Circuit... i think
A magnetic compass can detect current, butyou'll need an Ammeter to measure it.A galvanometer can detect current ~ butyou'll need an Ammeter to measure it.
Conductors.
EMF is electromotive force. It is another name for voltage. Voltage is electric potential in joules per coulomb. Current is electric flow, in amperes. Amperes are coulombs per second. Voltage and current are not the same thing, and "emf current", or "voltage current" does not make sense.