20.1 Electric Charge & Static
Which subatomic particle is NOT found in the nucleus?
Electric ___________________ is the continuous flow of electric charge.
An incandescent bulb emits 40 joules of thermal and radiation energy every second. What is the power rating of that bulb?
This conveys information with electrical patterns called analog and digital signals.
What is one element that semiconductors are often made out of?
If you connect three 2.0 V batteries in series in a circuit, what is the total electrical potential difference across the circuit?
What type of circuit represents the old type of holiday lights, where if one bulb burned out, all of them went out?
In older TVs and computer monitors, the image is produced by a type of vacuum tube called a _________________________________________________, also known by the three-letter acronym ___ ___ ___.
When a cat standing on broken power lines is electrocuted when its head touches a second wire, this is because the bird has created a _________________ _________________ between the wires (similar to one you might create in your phone if you spill water on it).
What is the resistance of a light bulb if it uses 1.5 A when connected to a 240 V line?
What tool lets you measure resistance, voltage, and current?
By switching from __________________________ to solid-state components, we can now make computers small enough to fit in our pockets.
Two series circuits are built: one with a 2 V battery and the other with a 6 V battery. If each circuit has a total resistance of 200 Ω, how much more current is there in one circuit than the other?
How much power does a fan use if it draws 1.5 amps of current and is connected to a 240 volt line?
Binary uses the digits ____ and ____ to encode information.
In a triboelectric series, materials are placed in order of their ability to attract or lose electrons. Here is an example:
Tends to lose electrons <-- Human hands, human hair, silk, cotton, plastic wrap --> tends to gain electrons
If you rub a neutral human hair with a neutral cotton cloth, which will end up with a net positive charge?
Suppose there are 2 charges. q1 is positive and q2 is negative. If the distance between the charges is quartered, then the force between them will [increase / decrease] by ______ times.
Certain materials turn into ______________________________ when they are cooled more than 100°C below the freezing point of water.
How much electrical energy in kilowatts does a fan with a power rating of 300 watts use in 3 hours?
A microchip consists of many solid-state components and is also called an ____________________________ circuit.
If you increase the voltage of the battery in a circuit from 2 to 4 V while keeping the resistance the same, how many times more coulombs of charge will pass by a point on that circuit every second?