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Hi, when a current flows through a conductor a magnetic field is set up around it, it is this magnetic field or flux that attracts your compass. This of course has practical applications such as motors or generators using tight coils of wire which when a current is passed through sets up magnetic fields, in the form of a generator these lines of flux are turned and passed to stationary coils, in a motor these fields are rotated causing the yolk or rotor to chase the rotating magnetic field giving us circular motion.
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Is condensation near an electrical panel dangerous?
O course it is very dangerous. Moisture should never ever be allowed near a service panel.
What is the difference between primary electrical distribution and secondary distribution?
Primary electrical distribution carries medium voltage power to distribution transformers near the customers. Secondary electrical distribution transfers the power from the transformer to the households.
When did the United States stop using DC power in your homes?
We never did, that battle was lost before electrical transmissions lines where anywhere near common.
What changes the voltage of a current?
First off, voltage and current are two completely different, yet related phenomenons.Kirchoff's law states that Voltage = Current * Resistance (V=IR. So, to change the voltage in a given circuit while keeping current constant, simply change the resistance.Open in Google Docs ViewerOpen link in new tabOpen link in new windowOpen link in new incognito windowDownload fileCopy link addressEdit PDF File on PDFescape.com
What precautions should you take when using mains electrical equipment?
As an electrician you definitely use precautions around electricity to avoid getting shocked or electrocuted. Here are some precautions I use:If at all possible make sure the power is turned off.When the circuit breaker is turned off put a 'lock' on the breaker box and warning note to keep others from turning the power back on.If you can't turn the power off, make sure you are not grounded. Use rubber covered tools. Rubber sole shoes.If you can't turn the power off, work on each electrical wire separately. Capping or tapping the wire you are not using while you work on the hot wire.If you have to pull a flat bladed fuse from a fuse box use a specially built 'fuse puller'.If you can't turn the power off, use a 'Electrical Tick Detector' to make sure there is no power in the wires.There is a 'Circuit Breaker' finder if you don't know which breaker to turn off. You plug the 3 pronged insert into the receptacle then use the electrical wand to locate the breaker.There is a device for checking GFCI receptacles to make sure they are working properly.shutting up
Does a compass turn near a closed circuit wire?
It will if there is current flow
Is the magnetic field that is near an electrical circuit parallel or perpendicular to the circuit?
Perpendicular to the circuit.
What are 3 conductors you shouldn't have near an electrical circuit?
# Your body # Water # Earth (ground)
Why does the compass respond when it is near a electrical wire with current flowing through it?
Because electricity gives off a magnetic field.
What do tripped circuit breaker and blown fuses indicate?
Blown fuses indicate overload in the electrical circuit. Possible short-circuit or higher input voltage.Tripped circuit breakers I guess means:A residual-current device (RCD), similar to a residual current circuit breaker (RCCB) which is used for breaking the circuit when electric current pass through a man or could cause fire/burning in the/near the electrical sockets.
What fields are present near electricity?
Electromagnetic and electrostatic fields are present. The strength of each field is dependent upon the components in the electrical circuit.
What do tripped breakers and blown fuses indicate?
Blown fuses indicate overload in the electrical circuit. Possible short-circuit or higher input voltage.Tripped circuit breakers I guess means:A residual-current device (RCD), similar to a residual current circuit breaker (RCCB) which is used for breaking the circuit when electric current pass through a man or could cause fire/burning in the/near the electrical sockets.
What do Tripped circuits and blown fuses indicate?
Blown fuses indicate overload in the electrical circuit. Possible short-circuit or higher input voltage.Tripped circuit breakers I guess means:A residual-current device (RCD), similar to a residual current circuit breaker (RCCB) which is used for breaking the circuit when electric current pass through a man or could cause fire/burning in the/near the electrical sockets.
Can you use a compass to detect the currents in wires in the walls near light switches in your home?
Yes, the needle would point perpendicular to the wire, and parallels to the magnetic lines of the wire. Another answer The above answer would be correct IF you were dealing with a DC circuit AND there was a load on the circuit, but house wiring uses Alternating Current, and the compass needle would attempt to reverse directions at the rate of 60 cycles per second. Effectively, the needle would simply act strange when it's near house wiring, IF there is a current load on the wire. ++ To add to that, use a proper cable-locator, not a compass.
Should you see a fence on the compass when your near the cattle ranch?
You should never see a fence on a compass.
What happens to a compass when it is brought near a current-carrying wire?
the compass aligns with the magnetic field created by the wire
What did Humphrey Davy notice about a wire with electricity running through it as he brought it near a compass?
The compass needle was deflected.
