Understanding Ohm's Law

What happens to the charges when the voltage of the battery is increased?

• The charges increase in movement, leading to a higher current.
• The charges reverse direction, causing a negative current.
• The charges remain unchanged regardless of the voltage increase.
• The charges decrease in movement, leading to a lower current.

Find the resistance in Ω of a single motor horn if it has a voltage of 12 V and current of 8.0 A.

• 2.0 Ω
• 0.75 Ω
• 1.5 Ω
• 3.0 Ω

If a power source has a resistance of 44 Ω and a current of 5.0 A, what is its voltage?

• 110 V
• 220 V
• 180 V
• 300 V

voltage

• Voltage is measured in amperes (A).
• Voltage is measured in volts (V).
• Voltage is a measure of resistance.
• Voltage is measured in ohms (Ω).

Current

• Volt

• Ampere

• Ohm

• Resistance

Resistance

• Resistance is measured in ohms (Ω).
• Resistance is measured in watts (W).
• Resistance is measured in amperes (A).
• Resistance is measured in volts (V).

Ohm’s law tells us that to increase the amount of current in a circuit, we can ________.

• increase the capacitance
• decrease the voltage
• increase the resistance
• increase the voltage

Ohm’s law tells us that to increase the amount of current in a circuit, we can ________.

• lower the voltage

• lower the resistance

• increase the resistance

• increase the capacitance

It is the rate of flow of electric charges from one point to another in a circuit.

• Electric power
• Electric current
• Electric resistance
• Electric voltage

An instrument used to measure the current in the circuit.

• Ohmmeter
• Ammeter
• Capacitor
• Voltmeter