GCA Physics Electricity Flashcard Review

Front

What happens to the electrical force between two charges held some distance apart, if the value of BOTH of the charges double?

Back

The electrical force increases to 4 times its original value (4 F). This is due to Coulomb's Law, which states that the force between two charges is directly proportional to the product of the charges.

Front

Resistance and current are ____ related for ALL circuits.

Back

Resistance and current are inversely related. This means that as resistance increases, current decreases, and vice versa.

Front

A flashlight uses 2 batteries so it has 3 V of electric potential. How much current flows if the bulb has a resistance of 12 Ohms? (Use V = IR)

Back

0.25 A. Using Ohm's Law (V = IR), we can rearrange to find I = V/R = 3V / 12Ω = 0.25 A.

Front

The more bulbs you add in a series circuit, the ____ they get.

Back

The more bulbs you add in a series circuit, the dimmer they get. This is because the total resistance increases, leading to a decrease in current.

Front

Potential difference and current are ____ related for ALL circuits.

Back

Potential difference and current are directly related. This means that as potential difference (voltage) increases, current also increases.

Front

What is Coulomb's Law?

Back

Coulomb's Law describes the force between two charged objects. It states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

Front

Define electric current.

Back

Electric current is the flow of electric charge, typically measured in Amperes (A). It represents the rate at which charge flows through a conductor.

Front

What is the unit of resistance?

Back

The unit of resistance is the Ohm (Ω). It quantifies how much a material opposes the flow of electric current.

Front

Explain the difference between series and parallel circuits.

Back

In a series circuit, components are connected end-to-end, so the same current flows through all components. In a parallel circuit, components are connected across the same voltage source, allowing multiple paths for current.

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). It is expressed as V = IR.