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Physics

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Alexandre Ferry

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3y ago
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Cards in this guide (9)
2001 toyoto blows fuse when you go in reverse

Not enough information. WHICH fuse blows out???

What is the resistance in ohms of the computer-monitor combination when a desktop computer and monitor together draw about 1.2 A of current and they plug into a wall outlet that is 120 V

60

Which is true of magnetic field lines but not electric field lines

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.

In terms of the scientific definition of work neither magnetic fields nor electric fields can do work

True

A material that prevents electrons from flowing freely is called what

an insulator

In a parallel circuit the is the same for every leg in the circuit

voltage

Electric fences are not connected to the ground in the circuit

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.

Is an atom that has the same number of protons as neutrons a neutral atom

False. The atom that has the same number of protons as it has electrons is a neutral atom.

Which of the following would be best to do of you were inside a car and a power line fell on the car

wait for someone from the power company to come ant help - APEX;0

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