Electric Charge
Ways of Charging, Insulator, and Conductors
Electric Force and Application of Static Electricity
Electricity, Electric Circuits, and Electric Potential Difference (Voltage)
Resistors and Ohm's Law
100
Although static charge linger for some time, eventually it is _________
Discharged.
100
Charging by friction occurs when?
When two objects are rubbed together.
100
Does a laser printer use static electricity to print ? True or False
True
100
Current Electricity refers to electric charges flowing in a _______.
Circuit.
100
What is a resistor?
A resistor is a component of a circuit that resists the flow of electrical current.
200
The study of static electric charge
Electrostatics
200
Charging by conduction occurs when?
Objects touch and electric charge is transferred from one to the other.
200
Clothes stick to each other in the dryer because ?
they are rubbing against each other in a very dry area that cause static electricity and some cloth may be positively or negatively charged and it results in them sticking to each other
200
What is the similarities and differences between a primary cell and a secondary cell?
They both contain an electrolyte and a positive and negative electrode. A primary cell cannot be recharged because the chemical reactions are irreversible while a secondary cell can be recharged.
200
The relationship between voltage, current and the resistance of a conductor is known as?
Ohm's Law.
300
Some objects are more likely to lose electrons, when an object with increasing tendency to lose electrons is rubbed with one with less tendency to lose electrons, what happens?
The object with increasing tendency to lose electrons gain an negative charge.
300
Charging by induction is different from charging by conduction because ? Give example of charging by induction.
Objects never touch in charging by induction, some examples are dust buildup on screens.
300
What does an electrostatic precipiator do?
It removes ash particle from smoke
300
What does the Load in an electric circuit do?
It is a device that converts electrical energy into another form of energy.
300
Adding resistors to a series circuit __________ the total resistance while adding resistors to a parallel circuit _________ the total resistance.
increases, decreases.
400
A neutral object has equal number of ________ and ________ charges, they don't repel or ______ to each other.But, what happens when a charged object is brought near a neutral one?
Positive, negative, attract, when a charge object is brought near a neutral one they attract
400
A Faraday Cage protects the people inside because?
It contains the charge and protect the person inside.
400
How does a electrostatic precipitator work?
Exhaust from burning coal pass through negatively charge plates, where the ashes turn negative, then they pass between a pair of positive charged plates where they are attracted and scrapped off.
400
What happens to the current when it goes through a series circuit? A parallel circuit?
The current goes through the series circuit in sequence. In a parallel circuit, the current splits up and some of the current goes through each device.
400
What are most of the resistors made of?
Usually, resistors are made of carbon.
500
When a neutral object is attracted to an charged objects, it is called a ___ ______ _________
Induced Charge Separation
500
A metal leaf electroscope is used to detect electric charge, how does it work? (using a positive charged object)
When a positively charged object is brought near the electroscope, it induces a separation of charge. the ball near the top became negatively charged and two leaves positively charged and repel each other.
500
How does a laser printer function?
The printer drum is given a positive charge, the laser then "write" the printing in negative charge. the drum is the rolled onto the toner, which sticks to the drum because it have a positive charge. then its rolled onto the paper, the paper attracts the toner which makes the image.
500
What is the point of using a parallel circuit instead of a series circuit?
Using a parallel circuit allows for a longer battery life and a greater current. Also, using a parallel circuit allows the user to operate a device with two different switches.
500
The resistance of some materials also depend on what?
The resistance of some materials also depend on temperature.
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