5F - Current Flow

Front

What are electric field lines and what do they indicate about charged objects?

Back

Electric field lines are visual representations of the electric field around charged objects. They indicate the direction of the force that a positive test charge would experience in the field. The density of the lines represents the strength of the field.

Front

What is the formula for calculating current in a circuit?

Back

The formula for calculating current (I) in a circuit is I = V/R, where V is the voltage in volts and R is the resistance in ohms.

Front

What is the unit of electric current?

Back

The unit of electric current is the Ampere (A).

Front

What is the difference between conductors and insulators?

Back

Conductors are materials that allow electric current to flow easily (e.g., metals), while insulators are materials that resist the flow of electric current (e.g., rubber, glass).

Front

What is the charge of an electron?

Back

The charge of an electron is negative (-1.6 x 10^-19 coulombs).

Front

What is the charge of a proton?

Back

The charge of a proton is positive (+1.6 x 10^-19 coulombs).

Front

How do like and unlike charges interact?

Back

Like charges repel each other, while unlike charges attract each other.

Front

What is Ohm's Law?

Back

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

Front

What is the significance of a circuit's resistance?

Back

Resistance determines how much current will flow in a circuit for a given voltage. Higher resistance means less current for the same voltage.

Front

What is the role of a battery in a circuit?

Back

A battery provides the voltage (electrical potential) needed to drive the current through the circuit.