Which converts mechanical energy to electrical energy
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Definition1/12
a generator
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Term1/12
Do electric and magnetic fields always form closed loops
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Definition1/12
Magnetic fields do, because there's no such thing as an isolated
magnetic "pole",
and a magnetic line always starts and ends at opposite poles of
the same
magnetized object.
But electric fields don't. You can easily have a bundle of
isolated positive charge
over here and a bundle of isolated negative charge over there,
whereupon the
lines of the electric field start on one bundle and end on the
other bundle.
But electric field lines can also exist in closed loops, and
they do that in radio waves, where the electromagnetic field
propagates with an electric field component and a magnetic field
component, and they both form closed loops.
🔄 Click to see term
Term1/12
Current is the movement of negative charges called protons
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Definition1/12
false
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Term1/12
Electric fences are not connected to the ground in the circuit
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Definition1/12
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.
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Term1/12
When none of the magnetic domains in a material will stay aligned the material is called
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Definition1/12
not magentic
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Term1/12
In a closed circuit what does an increase in voltage cause
🔄 Click to see definition
Definition1/12
an increase in current, hence increased power and increased
heat.
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Term1/12
What are likely to be affected by a magnet
🔄 Click to see definition
Definition1/12
Credit card, an access card you scan for entry into a building
!
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Term1/12
Where would shock from an electrified fence be the least unpleasant if standing A barefoot on wet grass during rain B on a rubber mat or very dry ground C on a metal ladder against the fence
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Definition1/12
You would need to be standing on some kind of electrical
insulator, such as a rubber mat, or on very dry ground.
🔄 Click to see term
Term1/12
What will be attracted to or repelled by an magnet
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Definition1/12
a copper wire carrying current and another magnet.
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Term1/12
What do protons and electrons have that neutrons do not
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Definition1/12
Protons and electrons both have a positive or negative charge,
but neutrons have no charge.
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Term1/12
In terms of the scientific definition of work magnetic fields can do work but electric fields cannot true or false
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Definition1/12
false
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Cards in this guide (12)
2001 toyoto blows fuse when you go in reverse
Not enough information. WHICH fuse blows out???
Which converts mechanical energy to electrical energy
a generator
Do electric and magnetic fields always form closed loops
Magnetic fields do, because there's no such thing as an isolated
magnetic "pole",
and a magnetic line always starts and ends at opposite poles of
the same
magnetized object.
But electric fields don't. You can easily have a bundle of
isolated positive charge
over here and a bundle of isolated negative charge over there,
whereupon the
lines of the electric field start on one bundle and end on the
other bundle.
But electric field lines can also exist in closed loops, and
they do that in radio waves, where the electromagnetic field
propagates with an electric field component and a magnetic field
component, and they both form closed loops.
Current is the movement of negative charges called protons
false
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.
When none of the magnetic domains in a material will stay aligned the material is called
not magentic
In a closed circuit what does an increase in voltage cause
an increase in current, hence increased power and increased
heat.
What are likely to be affected by a magnet
Credit card, an access card you scan for entry into a building
!
Where would shock from an electrified fence be the least unpleasant if standing A barefoot on wet grass during rain B on a rubber mat or very dry ground C on a metal ladder against the fence
You would need to be standing on some kind of electrical
insulator, such as a rubber mat, or on very dry ground.
What will be attracted to or repelled by an magnet
a copper wire carrying current and another magnet.
What do protons and electrons have that neutrons do not
Protons and electrons both have a positive or negative charge,
but neutrons have no charge.
In terms of the scientific definition of work magnetic fields can do work but electric fields cannot true or false
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
Which is true of magnetic field lines but not electric field lines
When a fuse blows
Do electric and magnetic fields always form closed loops
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
An electric clothes dryer has a resistance of 16 ohms It draws 15 A of current What is the voltage in volts of the wall outlet that it is plugged into
Do electric and magnetic fields always form closed loops
In terms of the scientific definition of work neither magnetic fields nor electric fields can do work
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
Which is true of magnetic field lines but not electric field lines
Do electric and magnetic fields always form closed loops
In a parallel circuit the is the same for every leg in the circuit
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
A quantum of energy as defined in the Quantum Mechanical Model is a
Do electric and magnetic fields always form closed loops
What should you be standing on for the shock from an electric fence to be the least unpleasant