Understanding Ohm's Law and Circuit Analysis

What is Ohm's Law primarily concerned with?

• The relationship between current, voltage, and resistance

• The relationship between voltage, capacitance, and inductance

• The relationship between resistance, inductance, and capacitance

• The relationship between power, current, and resistance

What unit is used to measure electrical resistance?

• Watt

• Coulomb

• Ampere

• Ohm

Which component in a circuit typically opposes the flow of electrons?

• Transformer

• Resistor

• Capacitor

• Inductor

In a simple circuit with a known resistance and voltage, how can you calculate the current?

• Add the voltage to the resistance

• Subtract the resistance from the voltage

• Multiply the voltage by the resistance

• Divide the voltage by the resistance

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

• The current increases

• The current remains constant

• The current decreases

• There is no change to the current

How does increasing resistance affect the current in a circuit, assuming voltage remains constant?

• Current becomes zero

• Current decreases

• Current increases

• Current remains unchanged

If a circuit has a voltage of 10 volts and a resistance of 2 ohms, what is the current?

• 5 amps

• 0.2 amps

• 2 amps

• 20 amps

In a series circuit with two resistors, how does the total voltage across both compare to the source voltage?

• It is less than the source voltage

• It is more than the source voltage

• It is equal to the source voltage

• It cannot be determined without more information

What is the purpose of a voltage divider in a circuit?

• To distribute voltage across components

• To decrease the total current

• To convert AC to DC

• To increase the total voltage

What does a voltmeter measure in a circuit?

• Current

• Power

• Resistance

• Voltage