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☆☆☆☆☆A two-way speaker has two speaker cones built into one speaker assembly: one cone to generate lower-frequency sounds and one cone to generate higher-frequency sounds. The low-range speaker cone is larger, the high-range cone is smaller. In car speakers, the low-range speaker cone usually occupies most of the area of the speaker, and is made from a light-weight, paper-like material, sometimes painted black, sometimes gray. A three way speaker has three speaker cones built into the assembly, an additional cone for mid-range frequency sounds.
Electrons move onto the object, giving it a static charge.
Apex ;)
friction
they show wich way iron shavings would align themselves
They always make closed loops.
Electric field lines can either form closed loops or they can start and finish on isolated electric charges. Magnetic field lines always only form closed loops.
Yes, an electric current is the movement of negative charges called electrons.
true
A. It is measured in volts. B. It is related to current and resistance by Ohm's Law. D. It's what makes current flow in a circuit.
A it is an EMF it can exists in its form without performing any work
The pitch of a sound can be determined by its frequency alone.
electric force can act at a distance bbut is stronger when object are closer
A short answer:
An electric fence is connected to the ground only when an animal or a human being touches it to complete a circuit from the fence to the ground.
A longer answer:
The wires of an electric fence are not connected directly to the ground because, if that was done, the fence would be shorted out and would not be able to do its job!
This is how an electric fence is actually hooked-up: the electric fence is connected to one side of a specially designed high voltage source and the return side of that source is connected to the ground.
Then, whenever the skin of any animal - or human - touches the wire whilst standing on the ground in bare feet, they get a high-voltage (10,000) DC electric pulse from the electric fence. The shocks are designed to be only enough to make them jump back from the fence, not to "electrocute" them so badly as to cause serious injury or death.
not magentic
A 120V power supply connected to a 30 Ohm resistor will produce 120/30 or 4 amps of current.
It is promoted by a scientist.
Electric fields are invisible, and cannot be seen.
ML=YZ ,
If a home were wired in series, every light and appliance would have to be turned on in order for any light or appliance to work.
