Electricity (Honors)

Front

What is an insulator?

Back

An insulator is a material that does not allow electric current to flow through it easily. Examples include plastic, glass, and rubber.

Front

What is Ohm's Law?

Back

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

Front

What is the relationship between voltage, current, and resistance according to Ohm's Law?

Back

Current is directly proportional to voltage and inversely proportional to resistance.

Front

What is electrical resistivity?

Back

Electrical resistivity is a measure of how strongly a material opposes the flow of electric current. It is typically measured in ohm-meters (Ω·m).

Front

How does distilled water behave as an insulator?

Back

Distilled water has high electrical resistivity, making it a poor conductor of electricity and a good insulator.

Front

What is a resistor?

Back

A resistor is a component in an electrical circuit that resists the flow of electric current, causing a voltage drop.

Front

What is an example of a good electrical insulator?

Back

Glass is an example of a good electrical insulator.

Front

What is the difference between a conductor and an insulator?

Back

A conductor allows electric current to flow easily (e.g., metals like copper), while an insulator resists the flow of electric current (e.g., rubber, glass).

Front

What is the role of a light bulb in a circuit?

Back

A light bulb acts as a resistor that converts electrical energy into light and heat.

Front

What happens to current in a circuit if resistance increases?

Back

If resistance increases, the current decreases, assuming the voltage remains constant.