Electrical Science Mid point review

What is electrical current?

• The resistance to electron flow

• The flow of electrons through a conductor

• The energy stored in a battery

• The difference in electrical potential

Which unit is used to measure electrical current?

• Volt

• Watt

• Ohm

• Ampere

Which unit measures electrical resistance?

Ohm’s Law is best expressed as:

• Voltage = Current × Resistance

• Voltage = Current / Resistance

• Current = Voltage + Resistance

• Resistance = Voltage - Current

In a series circuit, if one component fails (opens), what happens to the current?

• It increases

• It decreases

• It stops flowing

• It splits among the remaining components

In a parallel circuit, which of the following remains the same across all branches?

• Current

• Voltage

• Resistance

• Power

What is the unit of electrical power?

• Watt

• Joule

• Amps

• Ohm

Which material is considered a good conductor of electricity?

• Wood

• Rubber

• Plastic

• Copper

What is the primary function of a battery in an electrical circuit?

• To convert AC to DC

• To provide a potential difference (voltage) that drives current

• To store electrical charge permanently

• To resist the flow of current

Which law states that the total current entering a junction equals the total current leaving the junction?