Chapter Review - 19 HS Physics OpenStax

You connect a resistor across a battery. In which direction do the electrons flow?

• The electrons flow from the negative terminal of the battery to the positive terminal of the battery.

• The electrons flow from the positive terminal of the battery to the negative terminal of the battery.

How does current depend on resistance in Ohm’s law?

• Current is directly proportional to the resistance.

• Current is inversely proportional to the resistance.

• Current is proportional to the square of the resistance.

• Current is inversely proportional to the square of the resistance.

In the context of electricity, what is resistance?

• Resistance is the property of materials to resist the passage of voltage.

• Resistance is the property of materials to resist the passage of electric current.

• Resistance is the property of materials to increase the passage of voltage.

• Resistance is the property of materials to increase the passage of electric current.

What is the mathematical formula for Ohm's Law?

• $V=I^2R$

• $V=\frac{R}{I}$

• $V=\frac{I}{R}$

• $V=IR$

In which circuit are all the resistors connected in series?

• 
• 
• 
• 

To draw the most power from a battery, should you connect a small or a large resistance across its terminals? Explain.

• Small resistance, because smaller resistance will lead to the largest power

• Large resistance, because smaller resistance will lead to the largest power

What is the voltage drop across two 80-Ω resistors connected in series with 0.15 A flowing through them?

• 12 V

• 24 V

• 36 V

• 48 V

When 12 V are applied across a resistor, it dissipates 120 W of power. What is the current through the resistor?

• 1,440 A

• 10 A

• 0.1 A

• 0.01 A

What is the equivalent resistance of the circuit shown above?

• $32.7\ \Omega$

• $100\ \Omega$

• $327\ \Omega$

• $450\ \Omega$