Electricity Marking Period 3

What is Ohm's Law?

• The law stating that the current through a conductor between two points is directly proportional to the voltage across the two points.

• The law stating that the current through a conductor between two points is inversely proportional to the resistance between those two points.

• The law that defines the relationship between power and resistance in an electrical circuit.

• The law that describes the capacitance in an electrical circuit.

If the voltage across a resistor is 10 volts and the current through the resistor is 2 amperes, what is the resistance?

• 20 ohms

• 5 ohms

• 0.2 ohms

• 10 ohms

Which formula represents Ohm's Law?

• All of the above

What happens to the current if the voltage is doubled while the resistance remains constant?

• It is halved.

• It remains the same.

• It is doubled.

• It is quadrupled.

Calculate the power dissipated in a circuit with a voltage of 12 volts and a current of 2 amperes.

• 6 watts

• 12 watts

• 24 watts

• 144 watts

In a series circuit with two resistors of 5 ohms and 10 ohms, what is the total resistance?

• 15 ohms

• 5 ohms

• 10 ohms

• 7.5 ohms

In a parallel circuit with two resistors of 6 ohms each, what is the total resistance?

• 12 ohms

• 3 ohms

• 6 ohms

• 1.5 ohms

What unit is used to measure electrical resistance?

• Volt

• Ampere

• Ohm

• Watt

If the resistance in a circuit is increased, what happens to the current, assuming voltage remains constant?

• It increases.

• It decreases.

• It remains the same.

• It becomes zero.

What is the voltage across a 4 ohm resistor if a current of 3 amperes is flowing through it?

• 7 volts

• 12 volts

• 1.33 volts

• 0.75 volts