Table of Contents
What is the function of the round third prong in a modern household electric plug? It grounds the case to zero potential, by connecting the appliance body directly to ground.
What is the function of the round third prong in an electric plug?
When you plug in a three-pronged plug, that third prong is providing an alternate pathway for electricity in the event of a fault. If you cut the third prong off of a plug, you defeat the safety feature.
Does a battery produce dc or AC does the generator at a commercial power station produce dc or AC quizlet?
The battery produces DC, and the generator at a power station produces AC.
Does the generator at a commercial power station produce dc or AC?
Does a battery produce dc or ac? Does the generator at a commercial power station produce dc or ac? The battery is dc; the generator is ac.
What causes a wire to become warm when current flows through it?
The electrical current through the wires itself causes the home wiring to heat up. This is because as the electrons flow they come across the resistive forces of the medium’s material, releasing energy that is expended in the form of heat energy.
What is the function of the third prong on the plug of an electric appliance quizlet?
What is the function of a third prong on a plug? The third prong protects people from electric shock by connecting the metal pieces of an appliance to the ground wire of the building. If a short circuit occurs in the appliance, the electric charge will flow directly into Earth.
Can you use an electrical cord without the 3rd prong?
If you cut the third prong off and the appliance is in good condition then nothing will happen. But if for instsnce a motor burns out and one of the wires touches the case then you will get a shock at the very least.
What is different between AC and DC?
Alternating Current (AC) is a type of electrical current, in which the direction of the flow of electrons switches back and forth at regular intervals or cycles. Direct current (DC) is electrical current which flows consistently in one direction.
Does voltage flow in a circuit?
Voltage, as an expression of potential energy, is always relative between two locations, or points. Sometimes it is called a voltage “drop.” When a voltage source is connected to a circuit, the voltage will cause a uniform flow of charge carriers through that circuit called a current.
What are the roles of a diode and a capacitor in an AC DC converter?
It’s just the current will lead the voltage by 90°. Capacitor can be connected across a diode bridge rectifier circuit which will give you a smoother DC signal as only the AC component of the waveform passes through the capacitor and will make the output waveform ripple free.
How do DC generators work?
A direct-current (DC) generator is a rotating machine that supplies an electrical output with unidirectional voltage and current. The field is produced by direct current in field coils or by permanent magnets on the stator. The output, or armature, windings are placed in slots in the cylindrical iron rotor.
Why do you power stations generate AC and not DC?
The power station generates AC and not DC because the transmission of alternating current is easier and very efficient. The transformers can step up and step down the voltage of the alternating current.
What is the role of a generator in producing electricity?
Generators don’t actually create electricity. Instead, they convert mechanical or chemical energy into electrical energy. They do this by capturing the power of motion and turning it into electrical energy by forcing electrons from the external source through an electrical circuit.
How does heat affect current flow?
In metal conductors, electrical current flows due to the exchange of electrons between atoms. Heating the metal conductor causes atoms to vibrate more, which in turn makes it more difficult for the electrons to flow, increasing resistance.
What temperature does wire insulation melt?
For example, PVC, a common wire insulator can melt in the range of 100-260°C (212-500°F) depending on the makeup of the PVC. Most commonly, PVC used for electronics manufacturing will melt between 160-190°C (320-374°F).
Why can telephone lines sag?
To allow for contraction/expansion due to changes in air temperature. During the winter, materials shrink (contract), so if the wires were tighter, they would either break, or pull the poles together. In summer, the opposite is true – the wires expand, causing them to ‘droop’.
What determines the strength or power of an electric current Milady?
Power equals amps times the voltage. What determines the strength or power of an electric current? The unit that measures the resistance in an electric circuit. Watt is a measurement of how much electricity is being used in one second.
What is the function of circuit breakers and fuses quizlet?
Fuses prevent circuits from overheating devices and circuit breakers are added to the circuit. In circuit breakers, when you pull the switch back, you reconnect the metal band to the wires which is helpful for people.
What is the purpose of an electrical ground and how is it accomplished?
Electrical grounding, otherwise known as earthing, primarily provides a measure of safety against electric shocks by acting as a safety line to redirect electric current in the event of short circuits. For household appliances, this is accomplished by a three-pronged electrical outlet with a dedicated grounding prong.
Does leaving an extension cord plugged in use electricity?
An extension cord of this kind does not consume electricity when plugged in. The reason is that this kind of tool merely conducts electricity from the wall or other source to whatever is plugged into it. By itself, it does not and cannot consume units of power.
Why are some plugs not grounded?
Why do we use three prong plugs? A three prong plug is designed so that electricity can be safely supplied to electrical appliances. The third prong grounds the electricity to protect anyone who uses the metal-encased appliance from electric shock.
Why do plugs have two holes in the end?
Contrary to what you might think, Hubbell’s design featured no holes. Rather than having deliberate gaps in the middle of the metal, the design used to feature semi-circular indents on either side of the plug. These indents were designed to hook the plug to the socket and prevent it from falling out.
