Sci Unit 2 Lesson 2

Front

What is resistance in an electrical circuit?

Back

Resistance is a measure of the opposition to the flow of electric current, measured in Ohms (Ω).

Front

What happens to current when voltage increases while resistance remains constant?

Back

The current increases according to Ohm's Law (I = V/R).

Front

What is the unit of measurement for electric current?

Back

Electric current is measured in Amperes (A).

Front

What type of current continually reverses direction?

Back

Alternating current (AC) is the type of current that continually reverses direction.

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).

Front

What is the relationship between voltage, current, and resistance?

Back

The relationship is defined by Ohm's Law: V = I × R.

Front

What is a good conductor of electricity?

Back

A good conductor allows electric current to flow easily, examples include metals like copper and aluminum.

Front

What is a poor conductor of electricity?

Back

A poor conductor, or insulator, resists the flow of electric current, examples include rubber and glass.

Front

How does the thickness of a wire affect its resistance?

Back

Thicker wires have lower resistance compared to thinner wires, allowing more current to flow.

Front

What is the effect of increasing the length of a wire on its resistance?

Back

Increasing the length of a wire increases its resistance.