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Capacitors and Dielectrics Quiz

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Questions and Answers

What is the relationship between voltage and electrical potential energy?

Change in potential energy is equal to the charge multiplied by the change in voltage (correct)

Voltage is the same as electrical potential energy

Change in voltage is equal to the change in potential energy divided by the charge

Voltage and electrical potential energy are not related

Why can't a motorcycle battery be used in place of a car battery, even if they have the same voltage?

The motorcycle battery stores more energy than the car battery

The motorcycle battery has a different chemical composition

The car battery can move charges better than the motorcycle battery (correct)

The car battery has a higher voltage than the motorcycle battery

What is the purpose of the negative terminal in a battery?

To have an excess of negative charge, which will flow to the positive terminal (correct)

To attract positive charges

To balance the charge of the positive terminal

To repel negative charges

What is the difference between voltage and energy?

Voltage refers to the energy used to move a unit charge, while energy is the energy stored in a battery Signup and view all the answers

What is the purpose of the uniform electric field produced by placing a voltage across two parallel metal plates?

To create a potential difference between the plates Signup and view all the answers

What is the direction of the flow of charges inside a battery?

Both negative and positive charges flow from the negative terminal to the positive terminal Signup and view all the answers

What is a capacitor?

A device that stores an electric charge Signup and view all the answers

What is the purpose of adding a dielectric material between the plates of a capacitor?

To increase the capacitance of the device Signup and view all the answers

What is the relationship between the dielectric constant $k$ and the capacitance of a capacitor?

Capacitance increases by a factor of $k$ Signup and view all the answers

What is the purpose of a series circuit in a capacitor-based device?

To ensure that if one capacitor is damaged, the entire circuit becomes open and non-functional Signup and view all the answers

What is the unit of potential energy, as denoted by $PE$, in the equation $V = PE/q$?

Joules Signup and view all the answers

What is the primary function of a defibrillator device?

To store energy in its capacitors and release it when desired Signup and view all the answers